The green beam is produced at a visible light frequency of 532nm and utilizes “frequency doubling” crystal technology in order to produce the bright green light. The crystal actually produces an IR (infrared) beam at around 808nm which is doubled and then collimated producing the illuminating green laser light.
Hand held pointers are a very practical form of technology, but they have also found a strong hold amongst gadget enthusiasts and laser astronomers alike. Green lasers are so useful for astronomy applications because of how bright the beam is. For years the only available form of hand held laser technology came available to produce the red laser beam. This is less bright in comparison to a green beam, so as technology improved and pointers became widely available for lower costs, the entire community of astronomy slowly but surely updated their tools to meet current standards.
Learning is far easier when a beam is clearly visible through the night sky and green lasers can even be used during broad daylight at certain higher powers. Technology has allowed for world record breaking lasers which are capable or producing a beam visible at a distance of 100 miles or more. Its just too bad the earths curvature only allows for 12 miles of this beam to be seen on a flat surface, but that still does not take away from the fact that certain units are the worlds brightest life saving flares.
SCUBA divers from around the world have taken advantage of submergible products a safety tools as well as a source of light under water. These professional grade hand held units are not only available to professionals though, anyone with the right budget can obtain one of these exclusive laser pieces if you know where to look. Green laser pointers are not toys and should be handled with extreme care. Because so many products produce high output powers and produce intense light radiation, laser safety and education is a must for safe green laser use.