2008-12-31
Green Laser Pointer with Star Cap constellations beam
http://laserpointers.auctionblah.com/green-laser-pointer-with-star-cap-constellations-beam-72/
2008-12-24
Stable 405-, 35-mW Blue-Violet Laser Diode
Products, a UK optoelectronics device manufacturer and laser diode specialist, has introduced a lead-free, blue-violet wavelength (405 nm) laser diode from Sanyo. The Sanyo DL-5146-152 405-nm, 35-mW CW (50-mW pulsed) laser diode incorporates an internal monitor photodiode that can be used to accurately stabilize and control optical output power. Ideal for applications such as biomedical instrumentation, medical imaging, fluorescence sensing, spectroscopy and microscopy, the DL-5146-152 was also developed for use in DVD and other emerging technologies. Supplied in a 5.6-mm package with M-type common cathode pin configuration, the Sanyo DL-5146-152 laser diode has a low threshold current of 38 mA, typical operating current of 75 mA, operating voltage of 5.6 V (higher than conventional lasers), threshold voltage of 4.8 V, monitoring output current of 0.2 mA, laser reverse voltage of 2 V and differential efficiency of 0.9 mW/mA at a visible wavelength of 405 nm. The operating temperature range is 0 to 60 degrees C. Virtually all Sanyo laser diodes are now RoHS compliant.
http://www.photonics.com/Content/ReadArticle.aspx?ArticleID=24500
http://www.photonics.com/Content/ReadArticle.aspx?ArticleID=24500
New Type Of Laser Discovered
A Princeton-led team of researchers has discovered an entirely new mechanism for making common electronic materials emit laser beams. The finding could lead to lasers that operate more efficiently and at higher temperatures than existing devices, and find applications in environmental monitoring and medical diagnostics.
The team that conducted the study includes Gmachl's graduate student Kale Franz, who built the laser that revealed the new phenomenon, and Stefan Menzel, a graduate student from the University of Sheffield, UK, who unearthed the unique properties of the phenomenon during an internship at Princeton University last summer.
The study was published online in Nature Photonics on Dec. 14.
The light emitted by a laser differs fundamentally from light produced by common sources such as the sun, fire, or electric lamps. According to the field of physics called quantum electrodynamics, light is made up of particles called photons. Common sources of light emit photons that are in a random order, like crowds milling about a busy marketplace. In contrast, photons in a laser are "in sync" with each other, like a music band marching in formation. This property, called coherence, allows laser light to shine in an intense, narrow beam of a single, very pure color.
One way to produce a laser beam is to pass an electric current through a semiconductor such as gallium arsenide. The electric current pumps energy into the material, forcing a large number of its electrons to a higher energy level than normal. Under certain conditions, these electrons drop to a lower level of energy, and emit the extra energy in the form of synchronized photons of light. This is the mechanism underlying lasers used in CD writers, laser pointers and other common electronic devices.
http://www.sciencedaily.com/releases/2008/12/081222122609.htm
The team that conducted the study includes Gmachl's graduate student Kale Franz, who built the laser that revealed the new phenomenon, and Stefan Menzel, a graduate student from the University of Sheffield, UK, who unearthed the unique properties of the phenomenon during an internship at Princeton University last summer.
The study was published online in Nature Photonics on Dec. 14.
The light emitted by a laser differs fundamentally from light produced by common sources such as the sun, fire, or electric lamps. According to the field of physics called quantum electrodynamics, light is made up of particles called photons. Common sources of light emit photons that are in a random order, like crowds milling about a busy marketplace. In contrast, photons in a laser are "in sync" with each other, like a music band marching in formation. This property, called coherence, allows laser light to shine in an intense, narrow beam of a single, very pure color.
One way to produce a laser beam is to pass an electric current through a semiconductor such as gallium arsenide. The electric current pumps energy into the material, forcing a large number of its electrons to a higher energy level than normal. Under certain conditions, these electrons drop to a lower level of energy, and emit the extra energy in the form of synchronized photons of light. This is the mechanism underlying lasers used in CD writers, laser pointers and other common electronic devices.
http://www.sciencedaily.com/releases/2008/12/081222122609.htm
2008-12-16
Laser Pointers As Protestor's Tool
Protestors used laser pointers to try to blind police as unrest continued in Greece over the fatal police shooting of a teenager. via: Metro
I have heard of a lot of stories on misuse of laser pointers by pointing to aircrafts and sportmen etc. But using of laser pointers in a riot is the first time. It is really like a weapon in small scale war.
http://yan.me/2008/12/laser-pointers-protestors-tool
I have heard of a lot of stories on misuse of laser pointers by pointing to aircrafts and sportmen etc. But using of laser pointers in a riot is the first time. It is really like a weapon in small scale war.
http://yan.me/2008/12/laser-pointers-protestors-tool
2008-12-09
High power laser diode DRIVER for DPSS lasers
The Laser Diode Driver is an electronic device that combines high power current source (up to 10A) for laser diode (LD) and two controllers for Peltier termoelectrical coolers (TECs).
Compact and highly-efficient design limits power dissipation and simplifies heat-sinking requirements. Perfectly suited for OEM applications.
The Laser Diode Driver incorporates LD protection features like slow current ramp-up (soft start function), current limit, temperature limit and overheating protection.
Features
-Easy controlled
-Soft start function
-Laser diode current up to 10A
-User selectable: 2 uni-directional TEC controllers or single bi-directional TEC controller
-For smooth temperature stabilization - adjustable parameters to avoid temperature oscillations
-Overheating protection for laser diode
-Compact size: 119mm(with DB15 socket 128mm) x 51mm x 20mm.
-LD current modulation (optional)
-Microprocessor controlled
-USB 2.0 compatible
http://optics.org/cws/product/P000001876
Compact and highly-efficient design limits power dissipation and simplifies heat-sinking requirements. Perfectly suited for OEM applications.
The Laser Diode Driver incorporates LD protection features like slow current ramp-up (soft start function), current limit, temperature limit and overheating protection.
Features
-Easy controlled
-Soft start function
-Laser diode current up to 10A
-User selectable: 2 uni-directional TEC controllers or single bi-directional TEC controller
-For smooth temperature stabilization - adjustable parameters to avoid temperature oscillations
-Overheating protection for laser diode
-Compact size: 119mm(with DB15 socket 128mm) x 51mm x 20mm.
-LD current modulation (optional)
-Microprocessor controlled
-USB 2.0 compatible
http://optics.org/cws/product/P000001876
2008-12-07
Green Laser Pointers - Which One Should I Choose?
Just by typing in the word "laser pointer" into google's search engine, you will find hundreds of laser pointer companies out there. Some have very attractive websites with very high prices. Some laser pointers offer the same functions and power but are much cheaper. It's all very confusing especially when you don't understand what all the terms mean. You're about to spend a good amount of money on a laser pointer, the least you should is do some research before choosing the right laser and right company for your needs.
The first thing you will notice about high powered green laser pointers is they are always categorized by power. This is the number with "mW" at the end. mW stands for milli-watts and is 1/1000 of a watt, that is, 1000mW is 1W. You will also see another number associated with green laser pointers. This number has "nm" at the end. This stands for nano-meters and is used to measure wavelength. You really don't have to look into this number too much as all green laser pointers have a wavelength of 532nm. Pretty much, when you see 532nm, you should automatically think of the color green.
Now, lets focus on power. This is probably the most important factor because the more power you buy, the more money you spend. Yes, power is expensive! You need to ask yourself, what are you buying this laser pointer for? I think I can categories this into 3 types of lasers.
The first type, you're looking to buy something for everyday use. You're a teacher, professor, or someone always doing presentations in large groups. You are looking to use the green laser pointer as a "pointer". Good, I can make the decision for you now. Get a 5mw green laser pointer. While you could buy something more powerful, I wouldn't suggest getting anything over 20mW if pointing is all you will be doing. 5mW is for small classroom pointing, 20mw is for longer distance pointing as in an auditorium. Now, I'm talking about real laser pointers, that is, don't buy from ebay or any auction sites. Their advertised output is usually fake. If you buy a 5mW, you'll probably end up with a 1-2mW green laser. You can search the term "Skylasers" in google, they are a good reputable company.
Now, the second type is looking for a visible beam green laser pointer. First question, are you looking to burn or melt anything with it? If you answer is no, stick with a green laser pointer between 20mW to 80mW. During the day, these lasers have a very bright end dot (the laser beam is not visible). Realize that you will not find a laser pointer with a visible beam during the day. At night, however, a 20-80mw green laser is very bright! Yes, amazingly bright! This is where I ask, how much do you plan on spending? The more power you buy, the brighter the laser pointer. On a personal note, I would recommend a 40 - 60mW green laser pointer if all you want is a bright beam. The 20mW is still slightly dim for me. 40mW to 60mW green laser pointers go for around $100-$150. If you have the money, go for the 80mW, you will notice the difference in brightness. I just think 40mW - 60mW is plenty bright though.
If you are looking to burn and melt with this laser, you need something above 100mW. Want to see laser pointers in action? Simple, go to youtube and search for "lasers". You will find green laser pointers from various companies lighting cigarettes, popping balloons, etc. There are some very cool videos out there. The question now is, what do you want to burn? Again, the more power you have, the faster your laser will burn and melt. You can buy green laser pointers with more then 500mw these days that could cost you a pretty penny. It's really up to you as to how much you want to spend. If burning is your thing, look around for reliable companies and compare prices. Buy something you are comfortable with spending.
There are several laser pointer forums out there that can be very resourceful to you. Stick with www.laserpointerforums.com, www.photonlexicon, and www.candlepoweredforums.com. These forums have a good following and members are generally very eager to answer your questions. I suggest staying away from www.lasercommunity.com, this forum is very tightly monitored and is run by a laser company. They do not allow members talking about other laser companies...
The first thing you will notice about high powered green laser pointers is they are always categorized by power. This is the number with "mW" at the end. mW stands for milli-watts and is 1/1000 of a watt, that is, 1000mW is 1W. You will also see another number associated with green laser pointers. This number has "nm" at the end. This stands for nano-meters and is used to measure wavelength. You really don't have to look into this number too much as all green laser pointers have a wavelength of 532nm. Pretty much, when you see 532nm, you should automatically think of the color green.
Now, lets focus on power. This is probably the most important factor because the more power you buy, the more money you spend. Yes, power is expensive! You need to ask yourself, what are you buying this laser pointer for? I think I can categories this into 3 types of lasers.
The first type, you're looking to buy something for everyday use. You're a teacher, professor, or someone always doing presentations in large groups. You are looking to use the green laser pointer as a "pointer". Good, I can make the decision for you now. Get a 5mw green laser pointer. While you could buy something more powerful, I wouldn't suggest getting anything over 20mW if pointing is all you will be doing. 5mW is for small classroom pointing, 20mw is for longer distance pointing as in an auditorium. Now, I'm talking about real laser pointers, that is, don't buy from ebay or any auction sites. Their advertised output is usually fake. If you buy a 5mW, you'll probably end up with a 1-2mW green laser. You can search the term "Skylasers" in google, they are a good reputable company.
Now, the second type is looking for a visible beam green laser pointer. First question, are you looking to burn or melt anything with it? If you answer is no, stick with a green laser pointer between 20mW to 80mW. During the day, these lasers have a very bright end dot (the laser beam is not visible). Realize that you will not find a laser pointer with a visible beam during the day. At night, however, a 20-80mw green laser is very bright! Yes, amazingly bright! This is where I ask, how much do you plan on spending? The more power you buy, the brighter the laser pointer. On a personal note, I would recommend a 40 - 60mW green laser pointer if all you want is a bright beam. The 20mW is still slightly dim for me. 40mW to 60mW green laser pointers go for around $100-$150. If you have the money, go for the 80mW, you will notice the difference in brightness. I just think 40mW - 60mW is plenty bright though.
If you are looking to burn and melt with this laser, you need something above 100mW. Want to see laser pointers in action? Simple, go to youtube and search for "lasers". You will find green laser pointers from various companies lighting cigarettes, popping balloons, etc. There are some very cool videos out there. The question now is, what do you want to burn? Again, the more power you have, the faster your laser will burn and melt. You can buy green laser pointers with more then 500mw these days that could cost you a pretty penny. It's really up to you as to how much you want to spend. If burning is your thing, look around for reliable companies and compare prices. Buy something you are comfortable with spending.
There are several laser pointer forums out there that can be very resourceful to you. Stick with www.laserpointerforums.com, www.photonlexicon, and www.candlepoweredforums.com. These forums have a good following and members are generally very eager to answer your questions. I suggest staying away from www.lasercommunity.com, this forum is very tightly monitored and is run by a laser company. They do not allow members talking about other laser companies...
How to Choose the Atlasnova 635nm RED Laser Pointer All Black Class IIIa
I really revel in my Atlasnova 635nm RED Laser Pointer All Black Class IIIa! Atlasnova 635nm RED Laser Pointer All Black Class IIIa is such an breathtaking product that I dont know how I’ve lived without it all these years.
The high quality of Atlasnova 635nm RED Laser Pointer All Black Class IIIa is astonishing, and I promise you will be completely overjoyed with Atlasnova 635nm RED Laser Pointer All Black Class IIIa.
I bought my Atlasnova 635nm RED Laser Pointer All Black Class IIIa from ebay and was certainly cheerful with the breathtaking shopping experience, prompt delivery, and lowest price for Atlasnova 635nm RED Laser Pointer All Black Class IIIa.
If you want to buy Atlasnova 635nm RED Laser Pointer All Black Class IIIa, I have left some info, photos, and auctions on ebay for Atlasnova 635nm RED Laser Pointer All Black Class IIIa. Consider buying your Atlasnova 635nm RED Laser Pointer All Black Class IIIa from ebay as you will obtain the absolute cheapest cost and awe-inspiring service.
I suggest ebay to anyone getting Atlasnova 635nm RED Laser Pointer All Black Class IIIa.
http://hulettblog1836.blogsatu.com/2008/12/07/how-to-choose-the-atlasnova-635nm-red-laser-pointer-all-black-class-iiia/
The high quality of Atlasnova 635nm RED Laser Pointer All Black Class IIIa is astonishing, and I promise you will be completely overjoyed with Atlasnova 635nm RED Laser Pointer All Black Class IIIa.
I bought my Atlasnova 635nm RED Laser Pointer All Black Class IIIa from ebay and was certainly cheerful with the breathtaking shopping experience, prompt delivery, and lowest price for Atlasnova 635nm RED Laser Pointer All Black Class IIIa.
If you want to buy Atlasnova 635nm RED Laser Pointer All Black Class IIIa, I have left some info, photos, and auctions on ebay for Atlasnova 635nm RED Laser Pointer All Black Class IIIa. Consider buying your Atlasnova 635nm RED Laser Pointer All Black Class IIIa from ebay as you will obtain the absolute cheapest cost and awe-inspiring service.
I suggest ebay to anyone getting Atlasnova 635nm RED Laser Pointer All Black Class IIIa.
http://hulettblog1836.blogsatu.com/2008/12/07/how-to-choose-the-atlasnova-635nm-red-laser-pointer-all-black-class-iiia/
2008-12-01
5mw 532nm Astronomy Powerful Green Laser Pointer - Silver
Silver Finish High Power Green Laser. We ensure that every high power green laser pointer is hand calibrated and tested to output at least 4.99mw and thus offers the expected stunning power expected of a real constant wave green (532nm) laser pointer, much brighter to look at than a regular red laser pointer and always with a visible green beam. This high power green laser pointer will impress your coworkers, family and friends. Use it for your next presentation and everybody will know that you are ahead of the latest technology. BONUS ITEMS INCLUDED - LED Flashlight Keychain and Microfiber Optical Cloth (1 set per order)
http://electronicslog.com/presentation-pointers/5mw-532nm-astronomy-powerful-green-laser-pointer-55840.html
http://electronicslog.com/presentation-pointers/5mw-532nm-astronomy-powerful-green-laser-pointer-55840.html
Belfast flights targeted by laser pointers
At least five attempts have been made to dazzle pilots with laser pointers in the skies over Belfast over the last six months.
In the most serious incident early in August, the captain of a Boeing 737 was hit in the eye with a laser as he made his approach to Belfast City Airport.
On 31 October, numerous planes on final approach to the same airport were targeted by a green laser over a full hour.
The most recent involved a Boeing 737 at 4,700 feet ten days ago.
The British Airline Pilots Association said there had been prosecutions for similar offences in other parts of the UK and they would like to see anybody who did this put behind bars and taught a lesson.
A British Civil Aviation Authority spokesman said it took the threat to aviation safety extremely seriously.
'Any member of the public shining a light at an aircraft or helicopter could endanger the safety of the flight and any person found guilty of such an offence could face a custodial sentence,' he said.
A PSNI spokeswoman said they were looking for witnesses.
She said police were aware of a number of reports of laser lights being shone at planes and that it was an offence under the air navigation order to endanger aircraft.
http://www.rte.ie/news/2008/1201/laser.html
In the most serious incident early in August, the captain of a Boeing 737 was hit in the eye with a laser as he made his approach to Belfast City Airport.
On 31 October, numerous planes on final approach to the same airport were targeted by a green laser over a full hour.
The most recent involved a Boeing 737 at 4,700 feet ten days ago.
The British Airline Pilots Association said there had been prosecutions for similar offences in other parts of the UK and they would like to see anybody who did this put behind bars and taught a lesson.
A British Civil Aviation Authority spokesman said it took the threat to aviation safety extremely seriously.
'Any member of the public shining a light at an aircraft or helicopter could endanger the safety of the flight and any person found guilty of such an offence could face a custodial sentence,' he said.
A PSNI spokeswoman said they were looking for witnesses.
She said police were aware of a number of reports of laser lights being shone at planes and that it was an offence under the air navigation order to endanger aircraft.
http://www.rte.ie/news/2008/1201/laser.html
2008-11-30
405nm 150mw BluRay Burning Laser Pointer
ML BluExtreme x150. This BluRay Burning laser pointer is capable of lighting matches from several feet away, popping balloons, slashing through vinyl electrical tape, and has a visible beam over 50 miles away! Order yours today from NitroxLasers.com!
http://www.metacafe.com/watch/2099168/405nm_150mw_bluray_burning_laser_pointer/
http://www.metacafe.com/watch/2099168/405nm_150mw_bluray_burning_laser_pointer/
2008-11-27
Convert your laser pointer to AA or AAA
introConvert your laser pointer to AA or AAA
Those LR44, A76, or 357 size batteries are more expensive than the laser pointer!! I needed a reasonable alternative. This one looks kinda rough but it does the job well and it is extremely cheap.
http://www.instructables.com/id/Convert_your_laser_pointer_to_AA_or_AAA/
Those LR44, A76, or 357 size batteries are more expensive than the laser pointer!! I needed a reasonable alternative. This one looks kinda rough but it does the job well and it is extremely cheap.
http://www.instructables.com/id/Convert_your_laser_pointer_to_AA_or_AAA/
Laser Pointer,laser，laser Module,green Laser,
laser module,red laser,green laser,visible laser,laser pointer,line laser,cross line laser,point laser,military laser,semiconductor laser
http://www.importers.com/industrial-supplies/industrial-lighting-lasers/Exporter/Shenzhen_Hongdu_Optoelectronics/ID.311216.TL.277101/laser_pointer_laser_65292_laser_module_green_laser_.html
http://www.importers.com/industrial-supplies/industrial-lighting-lasers/Exporter/Shenzhen_Hongdu_Optoelectronics/ID.311216.TL.277101/laser_pointer_laser_65292_laser_module_green_laser_.html
2008-11-25
Burning 405nm Violet Laser homemade diy blu ray xbox hd dvd
This laser is the same one from my previous video only now it has a case. If you want to see more of this laser without its case check
http://sharerevmedia.com/component/option,com_seyret/Itemid,52/task,videodirectlink/id,306082/
http://sharerevmedia.com/component/option,com_seyret/Itemid,52/task,videodirectlink/id,306082/
2008-11-24
Green Laser Pointer With Star Cap Constellations Beam
http://laserpointers.auctionblah.com/green-laser-pointer-with-star-cap-constellations-beam-29/
http://www.beamq.com/green-laser-pointers-emit-stars-p-90.html
http://www.beamq.com/green-laser-pointers-emit-stars-p-90.html
Police arrest suspect for shining laser at CHP helicopter
L CERRITO — Police arrested a 50-year-old man this morning after they say he shined a laser pointer into the cockpit of a Highway Patrol helicopter flying above the city, momentarily incapacitating the pilot.
Three officers were aboard. Nobody was hurt.
El Cerrito police asked the CHP for the helicopter about 2:30 a.m. to help search for a burglar who fled into the woods behind the city recycling yard at the end of Schmidt Lane. Police had staked out the yard for several nights because of copper theft, Detective Sgt. Paul Keith said.
"We set up out there and we heard them in the yard," Keith said. "There were two of them. We arrested (a 31-year-old San Pablo man) and the other ran up the hill."
The CHP helicopter, equipped with infrared equipment, looped around the crime scene at about 1,000 feet looking for the burglar. The pilot reported that a green laser struck his craft about 2:50 a.m., and the laser subsequently shone in his face, forcing the helicopter to abort its search for 10 or 15 minutes and for authorities both in the air and on the ground to look for the laser's source.
The helicopter spotted a man standing in a driveway near the corner of Moeser Lane and Seaview Drive and directed El Cerrito police to the address. Officers found three men inside. The resident, commercial laser salesman Brian Butler, eventually produced a green laser pointer.
Butler, a current probationer, was also wanted on uspicion of auto theft in Colorado, according to a statement from the CHP.
Police booked Butler into County Jail in Martinez on suspicion of discharging a laser at an aircraft — a potential felony — and booked another suspect on suspicion of petty theft.
Reach Karl Fischer at 510-262-2728 or kfischer@bayareanewsgroup.com
Three officers were aboard. Nobody was hurt.
El Cerrito police asked the CHP for the helicopter about 2:30 a.m. to help search for a burglar who fled into the woods behind the city recycling yard at the end of Schmidt Lane. Police had staked out the yard for several nights because of copper theft, Detective Sgt. Paul Keith said.
"We set up out there and we heard them in the yard," Keith said. "There were two of them. We arrested (a 31-year-old San Pablo man) and the other ran up the hill."
The CHP helicopter, equipped with infrared equipment, looped around the crime scene at about 1,000 feet looking for the burglar. The pilot reported that a green laser struck his craft about 2:50 a.m., and the laser subsequently shone in his face, forcing the helicopter to abort its search for 10 or 15 minutes and for authorities both in the air and on the ground to look for the laser's source.
The helicopter spotted a man standing in a driveway near the corner of Moeser Lane and Seaview Drive and directed El Cerrito police to the address. Officers found three men inside. The resident, commercial laser salesman Brian Butler, eventually produced a green laser pointer.
Butler, a current probationer, was also wanted on uspicion of auto theft in Colorado, according to a statement from the CHP.
Police booked Butler into County Jail in Martinez on suspicion of discharging a laser at an aircraft — a potential felony — and booked another suspect on suspicion of petty theft.
Reach Karl Fischer at 510-262-2728 or kfischer@bayareanewsgroup.com
2008-11-20
DIY - Make a blue laser pointer
This video shows you how to extract the blue laser from a DVD player and build a circuit to control it. The laser is powerful enough to pop a balloon or light a match:
http://brainstuff.howstuffworks.com/2008/11/19/diy-make-a-blue-laser-pointer/
http://brainstuff.howstuffworks.com/2008/11/19/diy-make-a-blue-laser-pointer/
2008-11-17
OMG — a kid just flashed a red laser light into my eye .. can I go blind? Should I go to ER? Please HELP !!!?
The damage will be instantaneous. If you can see, you are fine. Most lasers available to people (ie laser pointers) are not powerful enough to damage the eye, unless you look into it for a long period of time. There are more powerful lasers that this kid could have had, but it is unlikely. But, if you don't currently have vision problems from it, then there's nothing to worry about.
Oh, and there's also no reason not to look at a microwave when it is on. I don't know what the other guy is thinking, but microwave oven emit basically no radiation outside of the… inside. It is very easy to block microwaves, and as long as you didn't build the microwave yourself (which very few people would do something like that) or buy it from someone who did, I'm sure it has more than ample shielding. You know that mesh stuff on the window? Well, that's the shielding. So look all you want to. There's absolutely no risk.
Be carefull for that
if the laser was made of metal
and a copperish color
you can go blind
doesent mean you will though
about to years ago that happend to me.
i didnt go blind….
but if you truley cant see well
go see a doctor A.S.A.P
also
dont stare atmicrowaves when turned on
http://pcstateusa.blogmas.com/2008/11/16/omg-a-kid-just-flashed-a-red-laser-light-into-my-eye-can-i-go-blind-should-i-go-to-er-please-help/
Oh, and there's also no reason not to look at a microwave when it is on. I don't know what the other guy is thinking, but microwave oven emit basically no radiation outside of the… inside. It is very easy to block microwaves, and as long as you didn't build the microwave yourself (which very few people would do something like that) or buy it from someone who did, I'm sure it has more than ample shielding. You know that mesh stuff on the window? Well, that's the shielding. So look all you want to. There's absolutely no risk.
Be carefull for that
if the laser was made of metal
and a copperish color
you can go blind
doesent mean you will though
about to years ago that happend to me.
i didnt go blind….
but if you truley cant see well
go see a doctor A.S.A.P
also
dont stare atmicrowaves when turned on
http://pcstateusa.blogmas.com/2008/11/16/omg-a-kid-just-flashed-a-red-laser-light-into-my-eye-can-i-go-blind-should-i-go-to-er-please-help/
2008-11-13
4-in-1 Red Laser Pointer with WiFi
The Latest in Laser Technology -- Find the nearest wireless connection on the go with this cool laser. -- Equipped with a state-of-the art Wi-Fi detector, this red laser alerts you of the presence of any wireless network of 802.11b/g up to 150 feet away. -- This device can be used as a laser pointer, LED flashlight, and much more. -- Includes five LR44 batteries and a one year warranty. Satin silver finish multi Wi-Fi detector 4:1 comes with a PDA stylus and laser pointer. -- Size: 1/2" x 5 3/8".
http://www.firstscience.com/home/index.php?option=com_shop&task=item&Itemid=36&pid=428783725
http://www.firstscience.com/home/index.php?option=com_shop&task=item&Itemid=36&pid=428783725
Laser beams presenting increased risk to pilots: Transport Canada
MONTREAL — Transport Canada says the number of incidents involving laser pointers being directed at planes as they take off or land is on the rise.
Officials say 83 incidents have been reported across Canada since 2005, with 56 of them occurring in the last year alone.
Kirsten Goodnough of Transport Canada says the sharp rise is alarming and that the department is working with industry partners and police to address it.
Still, she says one explanation for the increase is that Transport Canada has been making a concerted effort to remind pilots that it's their duty to report them.
Capt. Barry Wiszniowski of the Air Canada Pilots Association says lasers are currently among the top three safety concerns for pilots.
The blinding light lasers emit can stun pilots during the critical periods of takeoff and landing but can also cause permanent eye damage.
http://canadianpress.google.com/article/ALeqM5iUXyILYUpbFbGyAQKTCzeinAjJVg
Officials say 83 incidents have been reported across Canada since 2005, with 56 of them occurring in the last year alone.
Kirsten Goodnough of Transport Canada says the sharp rise is alarming and that the department is working with industry partners and police to address it.
Still, she says one explanation for the increase is that Transport Canada has been making a concerted effort to remind pilots that it's their duty to report them.
Capt. Barry Wiszniowski of the Air Canada Pilots Association says lasers are currently among the top three safety concerns for pilots.
The blinding light lasers emit can stun pilots during the critical periods of takeoff and landing but can also cause permanent eye damage.
http://canadianpress.google.com/article/ALeqM5iUXyILYUpbFbGyAQKTCzeinAjJVg
2008-11-12
Montreal airport laser pointer a serious safety risk: Officials
MONTREAL - Transport Canada is trying to find out who has been pointing laser pointers at airplane pilots over the last few days.
There have been at least six instances recently where pilots landing at Montreal's Trudeau airport have been distracted by a green laser pointer.
The device, which can be purchased for $100 and has a range of three kilometres, can blind airline pilots, so Transport Canada considers it a serious safety risk.
Air Canada pilots are reportedly using the instruments on their planes to pinpoint the location from where the device is being used.
Montreal isn't alone. There are other reports of the devices being used in Calgary and Winnipeg, and in many U.S. cities.
It's illegal to distract pilots, and penalties are severe - up to $10,000 in fines.
This year a man pleaded guilty and was fined $1,000 for using a laser on a plane landing at Calgary's airport.
A dollar store laser pointer. Someone has been pointing the lasers at planes at the Montreal airport, an offence which can earn $10,000 in fines.
CNS
http://www.canada.com/topics/news/national/story.html?id=ddfaa308-eac8-46bc-8c6d-5af49cc2484f
There have been at least six instances recently where pilots landing at Montreal's Trudeau airport have been distracted by a green laser pointer.
The device, which can be purchased for $100 and has a range of three kilometres, can blind airline pilots, so Transport Canada considers it a serious safety risk.
Air Canada pilots are reportedly using the instruments on their planes to pinpoint the location from where the device is being used.
Montreal isn't alone. There are other reports of the devices being used in Calgary and Winnipeg, and in many U.S. cities.
It's illegal to distract pilots, and penalties are severe - up to $10,000 in fines.
This year a man pleaded guilty and was fined $1,000 for using a laser on a plane landing at Calgary's airport.
A dollar store laser pointer. Someone has been pointing the lasers at planes at the Montreal airport, an offence which can earn $10,000 in fines.
CNS
http://www.canada.com/topics/news/national/story.html?id=ddfaa308-eac8-46bc-8c6d-5af49cc2484f
2008-11-06
Star Wars Master Replicas Darth Maul Lightsaber Laser Pointer
Star Wars Master Replicas Darth Maul Lightsaber Laser Pointer
I must address that I’m oftentimes one that does not fancy shopping online, but my feeling on that has changed since I purchased my Star Wars Master Replicas Darth Maul Lightsaber Laser Pointer from ebay.
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I bought my Star Wars Master Replicas Darth Maul Lightsaber Laser Pointer with ease and the low price was untouchable. It was the absolute affordable price you could possibly track down for Star Wars Master Replicas Darth Maul Lightsaber Laser Pointer.
My Star Wars Master Replicas Darth Maul Lightsaber Laser Pointer arrived in a week from my seller. The Star Wars Master Replicas Darth Maul Lightsaber Laser Pointer was exactly as it was described! I am so joyous about ebay, I’m sure I will purchase more!
I have left some info on Star Wars Master Replicas Darth Maul Lightsaber Laser Pointer, a totally astounding product. I have left pictures, further details, and links to auctions. Be sure to take a look as you will locate the absolute lowest pricing on Star Wars Master Replicas Darth Maul Lightsaber Laser Pointer.
Click picture below to see great prices for Star Wars Master Replicas Darth Maul Lightsaber Laser Pointer on Ebay:
http://paxton6790.cubaweblogs.com/2008/11/06/star-wars-master-replicas-darth-maul-lightsaber-laser-pointer/
I must address that I’m oftentimes one that does not fancy shopping online, but my feeling on that has changed since I purchased my Star Wars Master Replicas Darth Maul Lightsaber Laser Pointer from ebay.
Not only was Star Wars Master Replicas Darth Maul Lightsaber Laser Pointer amazing, but the shopping experience was astounding too! The secruity that ebay has implemented is truly safe.
I bought my Star Wars Master Replicas Darth Maul Lightsaber Laser Pointer with ease and the low price was untouchable. It was the absolute affordable price you could possibly track down for Star Wars Master Replicas Darth Maul Lightsaber Laser Pointer.
My Star Wars Master Replicas Darth Maul Lightsaber Laser Pointer arrived in a week from my seller. The Star Wars Master Replicas Darth Maul Lightsaber Laser Pointer was exactly as it was described! I am so joyous about ebay, I’m sure I will purchase more!
I have left some info on Star Wars Master Replicas Darth Maul Lightsaber Laser Pointer, a totally astounding product. I have left pictures, further details, and links to auctions. Be sure to take a look as you will locate the absolute lowest pricing on Star Wars Master Replicas Darth Maul Lightsaber Laser Pointer.
Click picture below to see great prices for Star Wars Master Replicas Darth Maul Lightsaber Laser Pointer on Ebay:
http://paxton6790.cubaweblogs.com/2008/11/06/star-wars-master-replicas-darth-maul-lightsaber-laser-pointer/
Green-Red Laser Pointer
Many people have a red laser pointer and some really cool people have the green laser pointer. But very few people have them both built into a single unit. Being the cutting edge geek that you are, we know you'll choose this dual output beauty. Why would you want to be like everybody else?
The first laser pointer that projects a brilliant GREEN beam from one end and a high-power RED beam from the other end. The GREEN beam is just as bright as other green pointers, range up to 2 miles in darkness, wavelength 532 nm. The green laser beam (not just the dot) is visible at night. The RED beam is the most powerful red laser allowed by the FDA, range 4000 ft in darkness. Power output <5 mW.
Each color laser has these specs.
Green Laser Specifications
Output Type - Pulsed
Wavelength - 532 nm
Polarization - Linear (50:1)
Batteries: 2 X N-size
Beam Dia. at Source - 1 mm
Output Variance - 10% after 20 min.
Body Color - Silver
Beam Divergence - 1.2 mRad
Output Power - <5mW
Switch - Push Button
Operating Lifetime - 2000 hours
Class - IIIa
Range 10,000 ft (3000m) in darkness
Red Laser Specifications
Wavelength - 635 nm
Polarization - Linear (50:1)
Batteries: 3 Button-size
Beam Dia. at Source - 1 mm
Output Variance - 5% after 20 min.
Body Color - Silver
Beam Divergence - 1.2 mRad
Output Power - <5mW
Switch - Push Button
Operating Lifetime - 5000 hours
Class - IIIa
Range 4,000 ft (1300m) in darkness
Dimensions - 6.8 in. long, 0.55 in. dia.
Warranty - 90 days
Also look at:
http://www.beamq.com/greenred-laser-pointer-p-88.html
The first laser pointer that projects a brilliant GREEN beam from one end and a high-power RED beam from the other end. The GREEN beam is just as bright as other green pointers, range up to 2 miles in darkness, wavelength 532 nm. The green laser beam (not just the dot) is visible at night. The RED beam is the most powerful red laser allowed by the FDA, range 4000 ft in darkness. Power output <5 mW.
Each color laser has these specs.
Green Laser Specifications
Output Type - Pulsed
Wavelength - 532 nm
Polarization - Linear (50:1)
Batteries: 2 X N-size
Beam Dia. at Source - 1 mm
Output Variance - 10% after 20 min.
Body Color - Silver
Beam Divergence - 1.2 mRad
Output Power - <5mW
Switch - Push Button
Operating Lifetime - 2000 hours
Class - IIIa
Range 10,000 ft (3000m) in darkness
Red Laser Specifications
Wavelength - 635 nm
Polarization - Linear (50:1)
Batteries: 3 Button-size
Beam Dia. at Source - 1 mm
Output Variance - 5% after 20 min.
Body Color - Silver
Beam Divergence - 1.2 mRad
Output Power - <5mW
Switch - Push Button
Operating Lifetime - 5000 hours
Class - IIIa
Range 4,000 ft (1300m) in darkness
Dimensions - 6.8 in. long, 0.55 in. dia.
Warranty - 90 days
Also look at:
http://www.beamq.com/greenred-laser-pointer-p-88.html
300mw 532nm Green Laser TTL
Our company is specializes in manufacturing laser modules. Our products include Red Laser Pointer and Laser Module (Dot Laser Module, Line Laser Module, Cross Laser Module, Green Laser Module and infrared Laser Module) which wavelength range is from 635 nm to 980 nm with various power ranges.
http://www.importers.com/industrial-machinery/electrical-test-machinery/Exporter/Shannxi_Richeng_Technology_Developm/ID.283613.TL.235832/300mw_532nm_green_laser_TTL.html
http://www.importers.com/industrial-machinery/electrical-test-machinery/Exporter/Shannxi_Richeng_Technology_Developm/ID.283613.TL.235832/300mw_532nm_green_laser_TTL.html
2008-11-05
New Unique 5mW Violet Blue Laser Pointer 405nm
http://laserpointers.auctionblah.com/new-unique-5mw-violet-blue-laser-pointer-405nm-6/
Best Prices On Atlasnova 635nm RED Laser Pointer All Black Class IIIa
Best Prices On Atlasnova 635nm RED Laser Pointer All Black Class IIIa
I really appreciate my Atlasnova 635nm RED Laser Pointer All Black Class IIIa! Atlasnova 635nm RED Laser Pointer All Black Class IIIa is such an mighty product that I dont know how I’ve lived without it all these years.
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I bought my Atlasnova 635nm RED Laser Pointer All Black Class IIIa from ebay and was darned comfortable with the breathtaking shopping experience, super fast delivery, and lowest cost for Atlasnova 635nm RED Laser Pointer All Black Class IIIa.
If you want to buy Atlasnova 635nm RED Laser Pointer All Black Class IIIa, I have left information, images, and auctions on ebay for Atlasnova 635nm RED Laser Pointer All Black Class IIIa. Consider getting your Atlasnova 635nm RED Laser Pointer All Black Class IIIa from ebay as you will trace down the cheapest cost and heavenly service.
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http://shyla9379.personaltimes.net/2008/11/05/best-prices-on-atlasnova-635nm-red-laser-pointer-all-black-class-iiia/
I really appreciate my Atlasnova 635nm RED Laser Pointer All Black Class IIIa! Atlasnova 635nm RED Laser Pointer All Black Class IIIa is such an mighty product that I dont know how I’ve lived without it all these years.
The noticable quality of Atlasnova 635nm RED Laser Pointer All Black Class IIIa is astounding, and I promise you will be surely blessed with Atlasnova 635nm RED Laser Pointer All Black Class IIIa.
I bought my Atlasnova 635nm RED Laser Pointer All Black Class IIIa from ebay and was darned comfortable with the breathtaking shopping experience, super fast delivery, and lowest cost for Atlasnova 635nm RED Laser Pointer All Black Class IIIa.
If you want to buy Atlasnova 635nm RED Laser Pointer All Black Class IIIa, I have left information, images, and auctions on ebay for Atlasnova 635nm RED Laser Pointer All Black Class IIIa. Consider getting your Atlasnova 635nm RED Laser Pointer All Black Class IIIa from ebay as you will trace down the cheapest cost and heavenly service.
I suggest ebay to anyone purchasing Atlasnova 635nm RED Laser Pointer All Black Class IIIa.
Click picture below to see great prices for Atlasnova 635nm RED Laser Pointer All Black Class IIIa on Ebay:
http://shyla9379.personaltimes.net/2008/11/05/best-prices-on-atlasnova-635nm-red-laser-pointer-all-black-class-iiia/
Supply 500mw green laser pointers
I don't know it's true or not.
Here it is :
http://www.alibaba.com/sellinglead-gs/216306373/Sell_supply_500mw_green_laser_pointers.html
Here it is :
http://www.alibaba.com/sellinglead-gs/216306373/Sell_supply_500mw_green_laser_pointers.html
2008-10-22
Orion SkyLine Green Laser Pointer and Bracket for SkyScout
Product Description
This accessory makes the SkyScout even easier and more fun to use. Mount the SkyLine Green Laser Pointer on the side of the SkyScout and your entire group will see exactly where your SkyScout is pointed. You won't have to crane your neck back as you sight through the SkyScout -- or even view through it at all! Just hold it in a comfortable position and point the SkyLine's green laser at the object you want to ID. Then hit the Target button and read the object's description from SkyScout's LCD panel. Easy! The custom-designed ABS bracket attaches easily to side of the SkyScout. It will NOT interfere with the SkyScout's GPS system or pointing accuracy. You can also remove the Skyline from the bracket for use as a standalone sky pointer. The bracket is recommended ONLY for use with the Orion SkyLine Green Laser Pointer, which has been thoroughly tested to ensure it will not interfere with SkyScout's GPS system or pointing accuracy.
http://teles-copes.blogspot.com/2008/10/orion-skyline-green-laser-pointer-and.html
This accessory makes the SkyScout even easier and more fun to use. Mount the SkyLine Green Laser Pointer on the side of the SkyScout and your entire group will see exactly where your SkyScout is pointed. You won't have to crane your neck back as you sight through the SkyScout -- or even view through it at all! Just hold it in a comfortable position and point the SkyLine's green laser at the object you want to ID. Then hit the Target button and read the object's description from SkyScout's LCD panel. Easy! The custom-designed ABS bracket attaches easily to side of the SkyScout. It will NOT interfere with the SkyScout's GPS system or pointing accuracy. You can also remove the Skyline from the bracket for use as a standalone sky pointer. The bracket is recommended ONLY for use with the Orion SkyLine Green Laser Pointer, which has been thoroughly tested to ensure it will not interfere with SkyScout's GPS system or pointing accuracy.
http://teles-copes.blogspot.com/2008/10/orion-skyline-green-laser-pointer-and.html
2008-10-16
LaserLyte SleekPoint Laser Pointer
The LaserLyte SleekPoint laser pointer is an elegant and powerful tool for use during presentations, conferences, and lectures, and wherever you need to make your point clear. The LaserLyte company is among the leaders in visible laser products, representing dependability and quality craftsmanship. Slipped into your pocket or briefcase, the LaserLyte SleekPoint is always at the ready, whether on the road or in your office conference room.
The ultrathin SleekPoint Laser has a range of up to 1,800 feet, and a two-hour constant-use battery life. The SleekPoint is powered by a replaceable lithium CR-2025 watch battery, which is included with your purchase. The brushed aluminum-silver SleekPoint with its ultrathin design (at a lean 0.125 inches in diameter) can be stored anywhere and goes everywhere.
http://a-presentationpointers.blogspot.com/2008/10/laserlyte-sleekpoint-laser-pointer.html
The ultrathin SleekPoint Laser has a range of up to 1,800 feet, and a two-hour constant-use battery life. The SleekPoint is powered by a replaceable lithium CR-2025 watch battery, which is included with your purchase. The brushed aluminum-silver SleekPoint with its ultrathin design (at a lean 0.125 inches in diameter) can be stored anywhere and goes everywhere.
http://a-presentationpointers.blogspot.com/2008/10/laserlyte-sleekpoint-laser-pointer.html
2008-08-20
Green Laser Pointers emit STARS
SPECIFICATION:Operation Voltage: 3VBattery: AAA battery, 1.5*2pcsWave Length: 532nmOutput: <30mw, CLASS IIIB Laser ProductOperating Temp Range: 15~30Storage Temp Range: -10~30
Simply press the Laser Beam Button to drive the laser pointer; at the same time, turning the cap, laser beam will emit directly from the Laser Output Aperture. You will see sparkling stars change variously in the sky
http://www.beamq.com/green-laser-pointers-emit-stars-p-90.html
Simply press the Laser Beam Button to drive the laser pointer; at the same time, turning the cap, laser beam will emit directly from the Laser Output Aperture. You will see sparkling stars change variously in the sky
http://www.beamq.com/green-laser-pointers-emit-stars-p-90.html
2008-08-18
Laser Pointers
Background
The laser pointer is a low cost portable laser that can be carried in the hand. It is designed for use during presentations to point out areas of the slide or picture being presented, replacing a hand held wooden stick or extendable metal pointer. It is superior over older pointers because it can be used from several hundred feet away in a darkened area and because it produces a bright spot of light precisely where the user desires. It has also caught on as an all-purpose pointing tool and has become so commonplace that laws have been passed to restrict its use.
History
Technically, the word laser is an acronym that stands for "light amplification by stimulated emission of radiation," but the term has become so commonly used that it is no longer capitalized. The radiation is the light that is emitted from the laser; this light can be visible or invisible to the human eye. Technically, only some lasers use light amplification, but the name laser is still used for a device that produces monochromatic (all one color or wavelength), coherent (the light waves are similar enough to move in one direction) radiation.
All lasers have a lasing medium, a source of energy, and a resonator. The lasing medium is a material that can be pumped (energized) by an energy source (such as light or electricity) to a higher energy state. After being pumped, the lasing medium can release that energy as monochromatic radiation. The resonator is an area that allows the released energy to build up before being released. A basic resonator is a pair of mirrors at either end of the lasing medium. One mirror is completely reflective so that all light striking it reflects back into the lasing medium; the other is partially reflective so that some of the light striking it reflects back into the lasing medium and some of the light passes through it to exit the laser. The pair of mirrors causes the light to reflect back-and-forth through the lasing medium and align itself in one direction, which produces the coherency of the light.
The theory used to produce lasers was published in 1958 by researchers at Bell Labs. The first laser, built in 1960 at Hughes Aircraft, used a piece of ruby for a lasing medium, light for an energy source, and mirrors to produce a resonator. The semiconductor laser was invented in 1962. It used a semiconductor material, similar to the materials used in transistors and integrated circuits for a lasing medium. It also used direct current (DC) electricity, the current produced by batteries, for an energy source. It still used resonator mirrors. The first semiconductor lasers produced non-visible infrared radiation. Current semiconductor lasers can also produce visible light, with red being the least expensive type of semiconductor laser and green, blue, and violet being increasingly more expensive. Semiconductor lasers used in laser pointers are also known as diode lasers, because they are a type of semiconductor diode. A diode passes electricity easily in one direction; light emitting diodes and laser diodes produce light when electricity passes through them. Semiconductor electronics have become less expensive to produce since the late 1950s. They have also become smaller and require less energy. They became inexpensive enough to be used in consumer electronic devices such as laser pointers in the 1980s. Current laser diodes are the size of a blood cell. They produce light that is less collimated (moving all in one direction) than most lasers because the shortness of the resonator space. Because of this, they need some sort of external optics (lenses) to focus the light into a tighter beam. Laser diodes, like many semiconductor devices, are delicate and need to be protected from the environment and from power surges. Power control circuitry, which usually includes a photodiode (a diode that produces electricity when light strikes it) to monitor the output of the laser diode, prevents the diode from receiving too much or too little power. The diode is protected from the environment by a plastic case so that is resembles most other semiconductor devices that are used on circuit boards.
The first laser pointers cost hundreds of dollars, but the demand and improved methods of fabrication have resulted in a price below five dollars for the most inexpensive types. There are also several items which incorporate laser pointers, or at least the components, such as laser sights for guns and projectors with built-in laser pointers.
Raw Materials
A laser diode is less complicated than many types of consumer electronic equipment. It consists of a laser diode, a circuit board, a case, optics, and a case. Some of the electrical components on the circuit board and the laser diode are made of semiconductor materials, metals, and ceramics. The semiconductor materials include compounds (materials made of more than one pure element) made of aluminum, gallium, arsenic, phosphorus, indium, and similar elements. These compounds are used in a variety of semiconductor products. Semiconductors also contain metals such as aluminum, gold, and tantalum.
The circuit board is typically made of a resin (plastic) such as epoxy with glass fibers in it to strengthen it. Electricity is conducted to the various components on the circuit board with lines of metal such as aluminum and copper. Individual components placed on the circuit board include diodes, the laser diode, capacitors, and resistors. Semiconductor parts, such as the diodes are encapsulated in plastic with metal leads that are connected to metal pads on the circuit board with solder (a metal alloy traditionally made of tin and lead, but now containing less lead and other metals as substitutes). Non-semiconductor parts, such as resistors and capacitors, are made of a variety of metals, plastics, and ceramics (including glass).
The collimating optics can be glass, but less expensive acrylic plastics are used in most laser pointers. The case can be made of any material, such as metal, plastic, or even wood. It contains metal (usually brass) contacts for the batteries.
Design
The design of the laser pointer depends on the electrical requirements of the laser diode, the desired lifetime of the power supply, and the drive to produce smaller consumer products. The smallest laser pointers are less than two inches in length, but some laser pointers are designed to look like pens. The longer laser pointers can hold AAA or AA batteries, which provide a longer lasting power supply than the watch batteries used in the shorter laser pointers. Most laser pointers use two or three batteries.
The ManufacturingProcess
The red laser pointer is the most common laser pointer. Other laser pointers use different laser diode assemblies, but are produced in a similar fashion, so the red laser pointer manufacturing process and diagram are used in this article.
The laser diode
The laser diode is produced in a semiconductor fab (a factory where semiconductor materials are produced in very clean and carefully controlled conditions). The substrate is the base material on which other materials will be deposited. A wafer of the substrate is produced, cleaned, and prepared. Then it goes through several steps where layers of material are deposited on it. Some of these layers are only several atoms thick. These layers can be conductive (metals such as aluminum and gold) or semiconductors (as described above). These layers can also be altered by exposure to other chemicals. After all materials are added to the wafer, it is diced (cut apart, usually into rectangular sections) into individual diodes. The diodes are tested either on the wafer or after separation, and nonfunctioning ones are scrapped (thrown away). Working laser diodes are then packaged in a plastic container with metal leads for electrical connection.
The circuit board
The circuit board contains the circuitry that makes the laser pointer function. It contains the switch, the laser diode, and the components of the control circuitry, typically a photodiode, diodes, resistors, and capacitors. These parts are placed on the circuit board, sometimes with an adhesive, and then are soldered in place. Soldering is a process where two metal objects are placed in contact and solder is melted around them so that when it cools, it surrounds both of them and holds them together. Solder is used instead of glue because it sticks to metal and because it conducts heat and electricity.
The collimating optics
The collimating optics in a laser pointer consist of a single lens that focuses the cone of light exiting the laser diode into a narrower beam that produces a narrower spot over a longer distance. Plastic lenses are injection molded, a process wherein molten plastic is forced into a mold. The plastic cools and solidifies, then the mold is pulled apart and the lens is removed. It is ground and polished to a smooth surface so that the light from the laser diode will not bounce off of imperfections on the surface.
The laser diode assembly
The laser diode and the collimating optics are put together with a plastic holder to form the laser diode assembly. Most laser diode assemblies have a metal spring attached at the back. This spring makes contact with the batteries in the laser diode and is part of the circuit that draws electricity from the batteries.
Case construction and finalassembly
The case is a tube with space for the laser diode assembly and the batteries. The laser diode assembly is pushed or screwed into one end of the case. The interior of the case is made of brass or has a brass strip (glued or riveted in place) running down the battery space. The battery space end piece also has an exposed brass area or is made of brass. When this end piece is pushed or screwed into the case, it contacts the other side of the batteries to complete the electrical circuit that allows electricity to flow from the batteries to the laser diode assembly.
The case also has a switch button (a piece of plastic sticking through a hole cut in the side of the case) that must be pushed and held for the laser pointer to work. When this button is pushed, the switch on the circuit board closes, electricity flows from the batteries to the laser pointer assembly, and the laser pointer produces a beam of light.
After the laser pointer is assembled and tested, a safety label is added. This label describes the rating of the laser in terms of power output, notes which regulations govern its use, and warns the user to avoid direct eye exposure.
Quality Control
A semiconductor manufacturer uses highly controlled processes that have been developed in laboratories and then transferred to the fabrication facility. Laser diodes are tested to make sure that they work after fabrication as well. Each other component is also tested to make sure that it works. Most manufacturing facilities will randomly test their products and use statistical control methods to provide quality products.
When the laser diode assembly or the laser pointer is finally assembled it will be powered and tested with a light detecting device, such as a photodiode, to measure its power output. Laser pointers are Type IIIA laser devices and must produce 5 mW (milliwatt, one thousandth of a watt) of power or less for the United States market. Laser pointers for the European market are typically Class II laser devices and must produce less than 1 mW. These restrictions are for safety purposes.
Byproducts/Waste
Laser pointers contain metals, plastics, and electronic parts. Each of those industries has specific waste byproducts (solvents, halocarbon gases, lead, chemicals), but laser pointer assembly has no specific wastes until the laser pointer is disposed of. A laser pointer contains small amounts of hazardous materials, such as lead and some toxic semiconductors. Like other electronic assemblies, it may be safer for the environment in the long term to recycle the components, though this is expensive and there are few programs in place to recycle or reuse electronics. This may change in the future.
The Future
Red laser pointers are the least expensive and most common today. Green laser pointers have more complicated laser diode assemblies and cost hundreds of dollars. Blue and violet laser pointers will be available soon at a higher price. Newer laser diode types come down in price as production volumes increase in order to keep up with demand, and as production processes improve. Laws that restrict laser pointer use may counteract this trend by causing a drop in demand as laser pointers are banned from public places.
Where to Learn More
Books
Gibilisco, Stan. Understanding Lasers. Blue Ridge Summit, PA: Tab Books, Inc., 1989.
Other
http://www.beamq.com/page.html?chapter=10&id=14
The laser pointer is a low cost portable laser that can be carried in the hand. It is designed for use during presentations to point out areas of the slide or picture being presented, replacing a hand held wooden stick or extendable metal pointer. It is superior over older pointers because it can be used from several hundred feet away in a darkened area and because it produces a bright spot of light precisely where the user desires. It has also caught on as an all-purpose pointing tool and has become so commonplace that laws have been passed to restrict its use.
History
Technically, the word laser is an acronym that stands for "light amplification by stimulated emission of radiation," but the term has become so commonly used that it is no longer capitalized. The radiation is the light that is emitted from the laser; this light can be visible or invisible to the human eye. Technically, only some lasers use light amplification, but the name laser is still used for a device that produces monochromatic (all one color or wavelength), coherent (the light waves are similar enough to move in one direction) radiation.
All lasers have a lasing medium, a source of energy, and a resonator. The lasing medium is a material that can be pumped (energized) by an energy source (such as light or electricity) to a higher energy state. After being pumped, the lasing medium can release that energy as monochromatic radiation. The resonator is an area that allows the released energy to build up before being released. A basic resonator is a pair of mirrors at either end of the lasing medium. One mirror is completely reflective so that all light striking it reflects back into the lasing medium; the other is partially reflective so that some of the light striking it reflects back into the lasing medium and some of the light passes through it to exit the laser. The pair of mirrors causes the light to reflect back-and-forth through the lasing medium and align itself in one direction, which produces the coherency of the light.
The theory used to produce lasers was published in 1958 by researchers at Bell Labs. The first laser, built in 1960 at Hughes Aircraft, used a piece of ruby for a lasing medium, light for an energy source, and mirrors to produce a resonator. The semiconductor laser was invented in 1962. It used a semiconductor material, similar to the materials used in transistors and integrated circuits for a lasing medium. It also used direct current (DC) electricity, the current produced by batteries, for an energy source. It still used resonator mirrors. The first semiconductor lasers produced non-visible infrared radiation. Current semiconductor lasers can also produce visible light, with red being the least expensive type of semiconductor laser and green, blue, and violet being increasingly more expensive. Semiconductor lasers used in laser pointers are also known as diode lasers, because they are a type of semiconductor diode. A diode passes electricity easily in one direction; light emitting diodes and laser diodes produce light when electricity passes through them. Semiconductor electronics have become less expensive to produce since the late 1950s. They have also become smaller and require less energy. They became inexpensive enough to be used in consumer electronic devices such as laser pointers in the 1980s. Current laser diodes are the size of a blood cell. They produce light that is less collimated (moving all in one direction) than most lasers because the shortness of the resonator space. Because of this, they need some sort of external optics (lenses) to focus the light into a tighter beam. Laser diodes, like many semiconductor devices, are delicate and need to be protected from the environment and from power surges. Power control circuitry, which usually includes a photodiode (a diode that produces electricity when light strikes it) to monitor the output of the laser diode, prevents the diode from receiving too much or too little power. The diode is protected from the environment by a plastic case so that is resembles most other semiconductor devices that are used on circuit boards.
The first laser pointers cost hundreds of dollars, but the demand and improved methods of fabrication have resulted in a price below five dollars for the most inexpensive types. There are also several items which incorporate laser pointers, or at least the components, such as laser sights for guns and projectors with built-in laser pointers.
Raw Materials
A laser diode is less complicated than many types of consumer electronic equipment. It consists of a laser diode, a circuit board, a case, optics, and a case. Some of the electrical components on the circuit board and the laser diode are made of semiconductor materials, metals, and ceramics. The semiconductor materials include compounds (materials made of more than one pure element) made of aluminum, gallium, arsenic, phosphorus, indium, and similar elements. These compounds are used in a variety of semiconductor products. Semiconductors also contain metals such as aluminum, gold, and tantalum.
The circuit board is typically made of a resin (plastic) such as epoxy with glass fibers in it to strengthen it. Electricity is conducted to the various components on the circuit board with lines of metal such as aluminum and copper. Individual components placed on the circuit board include diodes, the laser diode, capacitors, and resistors. Semiconductor parts, such as the diodes are encapsulated in plastic with metal leads that are connected to metal pads on the circuit board with solder (a metal alloy traditionally made of tin and lead, but now containing less lead and other metals as substitutes). Non-semiconductor parts, such as resistors and capacitors, are made of a variety of metals, plastics, and ceramics (including glass).
The collimating optics can be glass, but less expensive acrylic plastics are used in most laser pointers. The case can be made of any material, such as metal, plastic, or even wood. It contains metal (usually brass) contacts for the batteries.
Design
The design of the laser pointer depends on the electrical requirements of the laser diode, the desired lifetime of the power supply, and the drive to produce smaller consumer products. The smallest laser pointers are less than two inches in length, but some laser pointers are designed to look like pens. The longer laser pointers can hold AAA or AA batteries, which provide a longer lasting power supply than the watch batteries used in the shorter laser pointers. Most laser pointers use two or three batteries.
The ManufacturingProcess
The red laser pointer is the most common laser pointer. Other laser pointers use different laser diode assemblies, but are produced in a similar fashion, so the red laser pointer manufacturing process and diagram are used in this article.
The laser diode
The laser diode is produced in a semiconductor fab (a factory where semiconductor materials are produced in very clean and carefully controlled conditions). The substrate is the base material on which other materials will be deposited. A wafer of the substrate is produced, cleaned, and prepared. Then it goes through several steps where layers of material are deposited on it. Some of these layers are only several atoms thick. These layers can be conductive (metals such as aluminum and gold) or semiconductors (as described above). These layers can also be altered by exposure to other chemicals. After all materials are added to the wafer, it is diced (cut apart, usually into rectangular sections) into individual diodes. The diodes are tested either on the wafer or after separation, and nonfunctioning ones are scrapped (thrown away). Working laser diodes are then packaged in a plastic container with metal leads for electrical connection.
The circuit board
The circuit board contains the circuitry that makes the laser pointer function. It contains the switch, the laser diode, and the components of the control circuitry, typically a photodiode, diodes, resistors, and capacitors. These parts are placed on the circuit board, sometimes with an adhesive, and then are soldered in place. Soldering is a process where two metal objects are placed in contact and solder is melted around them so that when it cools, it surrounds both of them and holds them together. Solder is used instead of glue because it sticks to metal and because it conducts heat and electricity.
The collimating optics
The collimating optics in a laser pointer consist of a single lens that focuses the cone of light exiting the laser diode into a narrower beam that produces a narrower spot over a longer distance. Plastic lenses are injection molded, a process wherein molten plastic is forced into a mold. The plastic cools and solidifies, then the mold is pulled apart and the lens is removed. It is ground and polished to a smooth surface so that the light from the laser diode will not bounce off of imperfections on the surface.
The laser diode assembly
The laser diode and the collimating optics are put together with a plastic holder to form the laser diode assembly. Most laser diode assemblies have a metal spring attached at the back. This spring makes contact with the batteries in the laser diode and is part of the circuit that draws electricity from the batteries.
Case construction and finalassembly
The case is a tube with space for the laser diode assembly and the batteries. The laser diode assembly is pushed or screwed into one end of the case. The interior of the case is made of brass or has a brass strip (glued or riveted in place) running down the battery space. The battery space end piece also has an exposed brass area or is made of brass. When this end piece is pushed or screwed into the case, it contacts the other side of the batteries to complete the electrical circuit that allows electricity to flow from the batteries to the laser diode assembly.
The case also has a switch button (a piece of plastic sticking through a hole cut in the side of the case) that must be pushed and held for the laser pointer to work. When this button is pushed, the switch on the circuit board closes, electricity flows from the batteries to the laser pointer assembly, and the laser pointer produces a beam of light.
After the laser pointer is assembled and tested, a safety label is added. This label describes the rating of the laser in terms of power output, notes which regulations govern its use, and warns the user to avoid direct eye exposure.
Quality Control
A semiconductor manufacturer uses highly controlled processes that have been developed in laboratories and then transferred to the fabrication facility. Laser diodes are tested to make sure that they work after fabrication as well. Each other component is also tested to make sure that it works. Most manufacturing facilities will randomly test their products and use statistical control methods to provide quality products.
When the laser diode assembly or the laser pointer is finally assembled it will be powered and tested with a light detecting device, such as a photodiode, to measure its power output. Laser pointers are Type IIIA laser devices and must produce 5 mW (milliwatt, one thousandth of a watt) of power or less for the United States market. Laser pointers for the European market are typically Class II laser devices and must produce less than 1 mW. These restrictions are for safety purposes.
Byproducts/Waste
Laser pointers contain metals, plastics, and electronic parts. Each of those industries has specific waste byproducts (solvents, halocarbon gases, lead, chemicals), but laser pointer assembly has no specific wastes until the laser pointer is disposed of. A laser pointer contains small amounts of hazardous materials, such as lead and some toxic semiconductors. Like other electronic assemblies, it may be safer for the environment in the long term to recycle the components, though this is expensive and there are few programs in place to recycle or reuse electronics. This may change in the future.
The Future
Red laser pointers are the least expensive and most common today. Green laser pointers have more complicated laser diode assemblies and cost hundreds of dollars. Blue and violet laser pointers will be available soon at a higher price. Newer laser diode types come down in price as production volumes increase in order to keep up with demand, and as production processes improve. Laws that restrict laser pointer use may counteract this trend by causing a drop in demand as laser pointers are banned from public places.
Where to Learn More
Books
Gibilisco, Stan. Understanding Lasers. Blue Ridge Summit, PA: Tab Books, Inc., 1989.
Other
http://www.beamq.com/page.html?chapter=10&id=14
2008-08-14
2008-08-12
50mW 532nm Green Laser with Black color
Produce clearly visible green beam in the daytime. These lasers are not toys and have a range of up to 10 miles you not only see the green dot you also can see the beam. Great for hiking ,pointing out stars,they really are great fun but must be used with great care.
100% Brand New Professional green laser pointer pen Utilizing the latest technology in green laser
Color: Rubber blackMaterial: AluminumDimensions: 145mm(L) x 11mm(Diameter) Class: IIIB Wavelength: 532nmOutput Power: 50mWOutput Mode: Constant Wave Operation: ON/OFF touching buttonProject distance : 25000feet away (less in daylight).Battery: Alkaline AAA x 2pcs(not included as oversea shipping)Battery Life: 6 hoursDot Size: 15*15mm at 10M distanceExpected Life: 5,000 hours Package : EVA+Paper box, or Tin box with EVAGift Case Included
WARNING: Never point at people and always avoid direct eye contact.
100% Brand New Professional green laser pointer pen Utilizing the latest technology in green laser
Color: Rubber blackMaterial: AluminumDimensions: 145mm(L) x 11mm(Diameter) Class: IIIB Wavelength: 532nmOutput Power: 50mWOutput Mode: Constant Wave Operation: ON/OFF touching buttonProject distance : 25000feet away (less in daylight).Battery: Alkaline AAA x 2pcs(not included as oversea shipping)Battery Life: 6 hoursDot Size: 15*15mm at 10M distanceExpected Life: 5,000 hours Package : EVA+Paper box, or Tin box with EVAGift Case Included
WARNING: Never point at people and always avoid direct eye contact.
Green/Red Laser Pointer
Battery Installation:Unscrew the end cap and insert 2 x N sized batteries with the positive end outward. Operation:Point the desired laser away from you and press the green or red button and hold to turn the laser on. When you release the button it will turn the laser off.Specifications:Complies with 21 CFR 1040.10 & 1040.11 Accession #9812316-00Wavelength 650nm(Red) and 532nm(Green)Output Mode-Constant WaveOutput power<1mw(Red) and < 5mw(Green)Operating lifetime 8000 hours(Red) 4000 hours(Green)Range 4000 ft(Red) and 10000 ft(Green)Batteries 2 x N cell batteriesDimensions 7 inches in length , 1/2 inch diameter
Safety Precautions:Direct eye contact with laser beam may cause eye injury and should be avoided.Use of controls or adjustments or performance of procedures other than specified herein may result in hazardous radiation exposure
http://www.beamq.com/greenred-laser-pointer-p-88.html
Name:Green Light Laser Pointer
Name:Green Light Laser PointerDimension:diameter14 X 160mm Output Wavelength:532 nm Working Voltage:DC=3.0VTrigger Voltage:DC=2.3VWorking Current:I<250mAWorking Temperature:-20~+35Storage Temperature:-20~+60 Appearance and Color: Rubber Black(according to the request of customer) Parameter:Fixed focus, green dot facula, continuous output and working time over 5000 hours Output Power:5mW (1mW,10mW,15mW,20mW,30mW,50,80,100mW,150mW,200mW also for clients)
2008-08-04
100mw black green laser pointer
Introduction:Utilization of the latest laser crystal technology and optics creates this high quality;pen-sized Laser Pointer. It emits an intense, brilliant laser beam and has a range up to 1000 meters. Use your laser pointer to aim at any desired targets on projection screens,video monitors, presentation graphics, and any opaque as far as several hundred meters. Elegant gift box included.
User Safety Precautions:Under normal operation,it is safe to the human body.Focusing directly on a laser beam may result in temporary or permanent eye damage. Care should always be taken.
Battery Installation:When inserting the batteries ALWAYS point the laser emission hole away from your eye.Unscrew the pen clip from the pen. Insert batteries positive end upward and tightly screw the pen clip.Must use AAA size alkaline batteries.
Operation:Presss the push button to turn it on.Release the push button to shut if off automatically.Operating temperature: 15-35 degree.This pointer is not designed for long-term use.Constantly turning on will return accumulation of high temperature and sacrifice the lifetime of laser diode.
Caution:Never stare directly at the laser beam.Please keep out of reach of children.Do not drop the laser pointer on hard surface;it damages the pointer components and causes a malfunction.This high-end optic product must be handled with care.
Specifications:Wave length:532nmOutput Mode: Constant WaveOutput Power:100mw
CE FDA RoHs PAHs
http://www.beamq.com/100mw-black-green-laser-pointer-p-82.html
User Safety Precautions:Under normal operation,it is safe to the human body.Focusing directly on a laser beam may result in temporary or permanent eye damage. Care should always be taken.
Battery Installation:When inserting the batteries ALWAYS point the laser emission hole away from your eye.Unscrew the pen clip from the pen. Insert batteries positive end upward and tightly screw the pen clip.Must use AAA size alkaline batteries.
Operation:Presss the push button to turn it on.Release the push button to shut if off automatically.Operating temperature: 15-35 degree.This pointer is not designed for long-term use.Constantly turning on will return accumulation of high temperature and sacrifice the lifetime of laser diode.
Caution:Never stare directly at the laser beam.Please keep out of reach of children.Do not drop the laser pointer on hard surface;it damages the pointer components and causes a malfunction.This high-end optic product must be handled with care.
Specifications:Wave length:532nmOutput Mode: Constant WaveOutput Power:100mw
CE FDA RoHs PAHs
http://www.beamq.com/100mw-black-green-laser-pointer-p-82.html
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