The generating way of green laser pointer is different

It is based on the coherence properties of laser, the laser beam into an electrical signal before the laser discriminator to identify whether the signal emitted by the laser source, according to the distribution of interference fringes and the emergence of the time,
This sound track record of high-density led flash light beam is encoded by the signal recording surface between the pits and the pits formed. They represent binary 0 and 1. Recording during playback, the laser beam picked up a binary digital scanning, the playback device uses very sophisticated servo control system to ensure good tracking. CD has been re-recorded signal can erase the old.
green laser pointer is not strange for people anymore in daily life.As the CD’s recording density, playback sound quality is good, small, easy to preserve, etc., it is gradually replacing the ordinary records and audio tapes as the main carrier of the future. Laser Geodynamics Satellite
Laser Geodynamic Satellite
U.S. launch of laser geodetic satellites. Abbreviation is Lageos. Its main task is to verify some of earthquake-related issues: determination of the earth plate movement; measure the Earth’s rotation and polar motion; study the mechanism of the earthquake; . There are more than 10 countries to participate in observation and study of global dynamics. Many countries have established earthquake laser tracking station, the initial range accuracy of about 5 cm to 2 cm in 1980, the time measurement accuracy of 10-8 ~ 10-9 seconds. Earth station is used for neodymium yttrium aluminum garnet laser crystal, laser pulse width of 0.2 ns. The elevation of the satellite earth station exceeds 20 ° can be obtained when the data, satellite data over the top when the best available, at low elevation measurements by atmospheric interference when more serious.
Laser as the light source spectrum technology. Compared with ordinary light, laser light source with good color, high brightness, strong and directional coherence and other properties, is used to study the interaction between light and matter, which identify where the system of material and its structure, composition, ideal light source for the state and its changes.The generating way of green laser pointer is different from that of common light. The emergence of the original laser spectroscopy in sensitivity and resolution has been greatly improved. As has been able to obtain high intensity, pulse width of the pole.
Oh, the price more expensive laser pointer, not a general sense of the small stalls that sell on, one second lighting a match, when the operation is not against human and animal safety, price 257 green laser pointer, laser pointer the real price are generally very expensive, have to sell China Valley Mall.