It is the infrared optical filter of green laser pointer

It will be more convenient for the customer to use green laser pointer 
With automatic, real-time detection and three-dimensional positioning capability, high positioning resolution, you can work 24 hours using the the ovate scan to detect suspicious underwater target. Kaman Aerospace Corporation successfully developed airborne underwater imaging laser radar, the biggest feature of the underwater target imaging. Of each laser pulse of the imaging laser radar coverage area, so the search far more efficient than non-imaging laser radar. In addition, the imaging laser radar can display the characteristics of the shape of the underwater target, easier to identify the target, this is a big advantage in the imaging laser radar. Chemical and biological warfare agent detection lidar. Chemical / biological weapons is a weapons of mass destruction. It is the infrared optical filter of green 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 green 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 green laser pointer is used to filtrate the light spectrum energy of the near infrared band.