|
Home / Technology / Gadgets and Gizmos
Green Laser Pointers Applications and advantages
By:Luigi Castagna
Green laser pointers were first commercially sold in the year 2000. They operate at the wavelength of 532 nm. Laser diodes of this wavelength are not available so the green light is obtained by the use of "DPSSFD" laser technology.
The process:-
A very high-powered Infrared laser diode working at 808 nm pumps a tiny block of Nd: YVO4 that generates light at 1,064 nm. This feeds a potassium titanyl phosphate intracavity frequency doubler crystal that produces green light of a visible 532 nm wavelength. High-powered green lasers use lithium triborate instead of KTP.
Features:-
An infrared filter, which is behind the mirror completely, removes the radiation of infrared spectrum from the output beam. In order to reduce cooling problems and prolong battery life, some green lasers operate in pulse or quasi-continuous-wave (QCW) mode. The Class III a laser product gives an output power of 5mw. This is the one of highest-powered street legal laser. Some green lasers even have an output of 10 mw, which has a range of 20,000 feet in darkness. Some even have a 3-second delay feature as these are high-powered lasers and can blind a person. Some laser point extenders are also available. They work by using lenses to minimize the beam spread of a laser. Its price starts from 55$. Majority of them have a life of around 3000 hours.
Applications:-
Green lasers can be used for a variety of roles. They can be used as pointing devices. The ability to form a continuous line in the dark is an added advantage; this has lead to its usage as rescue lights as it can be seen from miles away. It as been used for laser light shows. It is also used for sky gazing as a person can pinpoint a star by using the green laser. It can also be as laser pointers for guns, rifles. In the movie Alien vs. Predator it was used as a pointing device on some G36k carbines.
Advantages:-
The green laser has many advantages. It is fifty times brighter than a red laser because of which it can be seen from miles away, this helps in being rescued if a person is lost. It can also be used in high-tech weapons for aiming purposes. Because of its high range, Green laser pointers can be equipped in different kinds of weapons. High and low temperatures do not affect the performance of Green laser pointers so in case a person is lost in a desert, he can still use Green laser pointers to call for help, in other case, even if a person is lost some where in mountains all covered with ice, he can still use it.
Disadvantages:-
Due to its high power it can permanently damage a person's eye. As it can form a continuous line of light that might reveal a person's position so it cannot be used in stealthy operations or by SWAT.
Green laser is quite awesome but it should be used carefully.
Digg
del.icio.us
Blink
Stumble
Spurl
Reddit
Netscape
Furl
Article keywords: laser pointers, green lasers, laser, green alser pointers
Article Source: http://www.articles2k.com
For more information on laser pointers, please visit Laser Pointers
|
|
| Top Gadgets and Gizmos Articles |
|
|
- 2). Forty-Two Million iPods, Which is Mine? By : Ruben Soliman
With a growing number of iPod users, the need for efficient and discount iPod repair facilities are a must. From repairs to unique modifications, a simple iPod is now even more useful and distinct.
|
- 3). Benefits of Carbide Cutting Tools By : John Morris
In every machining system, one simply can’t ignore the important role that cutting tools play. Oftentimes, the quality of a finished product would rely on the quality of the cutting tools...
|
- 4). As the Wind Blows: A Look at Weather Vanes By : James Hunt
Weather vanes have been capturing the interest and imagination, of both young and old alike, for centuries. Watchful roosters overlooking barns, trotting horses topping elegant homes, these unique little weather devices have a rich history, predating the birth of Christ...
|
|
|
- 6). Graphical Calculators: What’s So Great About Them? By : Andrew James
Graphing calculators are an extremely useful tool for students, scientists, engineers and mathematicians. They are basically handheld computers, much more powerful than normal calculators and capable of performing complicated algebraic functions
|
- 7). Different Aspects Of A Compact Digital Camera By : Joseph Then
Compact digital cameras not only capture but store photographs electronically so there is no need for film or having them developed like a regular camera. New multifunctional digital cameras can take photographs, record sound and/or video.
|
|
|
- 9). Answering Machines: Whatever Happened To Them ? By : Andrew James
I remember back when the answering machine was a relatively new invention. My parents thought that it was the most amazing contraption that they had seen in years. Our answering machine was large and it had a large cassette tape in it that recorded incoming messages and another large cassette tape that played the outgoing messages
|
|
|
| New Gadgets and Gizmos Articles |
|
|
|
|
|
|
|
|
- 5). Different Aspects Of A Compact Digital Camera By : Joseph Then
Compact digital cameras not only capture but store photographs electronically so there is no need for film or having them developed like a regular camera. New multifunctional digital cameras can take photographs, record sound and/or video.
|
|
|
- 7). Digital Cameras Available In Many Varieties By : Joseph Then
With the large variety and quality of digital cameras out there how are going to know what kind you are going to use with ease? You are going to want to go and checkout all the different options and features that you are going to be able to choose from.
|
- 8). Are You At Risk of Losing All Your Data? By : Joseph Then
Have you ever imagined the day when you have spent 4 hours on an important report, only to discover that you have run out of battery and all your work is gone? Don’t you wish you have a back up battery somewhere?
|
- 9). Choosing A Chair Lift For Life By : John Morris
For some people, getting up from a sitting position can be quite a chore. Lift chairs help in this regard. In today’s modern world lift chairs offer those who have difficulty sitting down and getting up from sitting the opportunity to live normal lives even with their disability...
|
|
|
|
|
