When being compared with the red laser beam light of laser pointer .
Faced with the threat of the growing proliferation of chemical and biological weapons, many countries are taking measures to strengthen the defense of such weapons. The laser radar can be used for remote sensing of chemical and biological warfare agents. Each type of chemical warfare agents only absorb a specific wavelength of the laser, the laser is transparent to other wavelengths. The chemical warfare agent contaminated surfaces reflect different wavelengths of laser. Chemical warfare agents, this feature allows the use of laser radar to detect and identify. The laser radar can take advantage of the differential absorption and differential scattering of elastic backward scattering, the principle of induction fluorescent detection of chemical and biological warfare agents. Chemical and biological warfare agent detection lasers, laser radar uses a CO2 laser and Nd: YAG laser. However, whether it is necessary for laser pointer to equip with an infrared optical filter.
Field of environmental science. Atmospheric monitoring laser radar. By measuring a small amount of naturally occurring particles in the atmosphere after the scattering, the laser radar can detect wind speed to detect turbulence, real-time measurements of wind fields. Returned to the scattered radiation is very weak, and thus atmospheric monitoring laser radar sensitive receiver. The current aircraft gust ease of system installed in the body of the accelerometer-based, performance is limited. Effective measurement system requirements before the aircraft and turbulence encounter turbulence. Laser radar turbulence gust ability to provide better gust ease system for future military and civilian aircraft. U.S. Space Agency's "advanced in-flight measurement of airborne coherent laser radar", are exploring this concept. Normally, the infrared optical filter of laser pointer is used to filtrate the light spectrum energy of the near infrared band.
Aircraft after the microburst wind shear and wake, cause danger to the aircraft and its encounter. British Defense Identification and Research Council (the DARA) developed laser radar capable of measuring the aircraft after the microburst wind shear and wake speed. This laser radar in real-time monitoring on the runway, you can improve security, increase aircraft throughput. 30 to 110 km range in the upper atmosphere and lower ionosphere is an important part of the day - to "chain of solar activity in the upper atmosphere and ionosphere physics, chemistry and dynamics of the process, as well as its The interaction between the adjacent upper and lower level have a significant impact. Detection technology development in this area has been relatively weak. The infrared optical filter of laser pointer has to be prepared well.
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