It is compared with the blue green laser pointer

 It is compared with the blue green laser pointer  and red laser pointer
Silicon photodiode or avalanche photodiode detector wavelength of 1.06μm, is a near-infrared light not visible to the human eye, confidentiality is better relative to the ruby laser. Because of their concealment, high efficiency, lightweight, low power consumption advantages of the development of the rapid progress of the second generation of the Nd: YAG as the working substance Laser Ranging machine has been fully mature and a lot of equipment to tanks, armored vehicles, artillery , aircraft, submarines and other weapons systems [3]. The main disadvantage of the Nd: YAG laser rangefinder machines have the following aspects: the human eye damage. Studies have shown that the lower the 1.064μm band illustrates the value of the human eye, strong laser radiation would be the human eye to cause serious damage.The lean production of  green laser pointer should be performed
When the water content in the atmosphere under the conditions of the vapor density, limiting its maximum ranging capability, especially rain and objectives of the snow-covered, the goal of showing the reflection of multi-mirror symmetry, the CO2 laser ranging; CO2 laser wavelength (10.6μm ) of low reflectivity, the reflection coefficient is less than the laser wavelength of 1.06μm and other tactical targets; HgCdTe devices to detect the required cooling of the CO2 laser, these devices must work at low temperatures, and require specially designed pre-amplifier to overcome the noise. 1.5Xμm band wavelength laser as the most secure to the human eye, the air penetrating power reflection coefficient of the target, and corresponds to room temperature.It is the workshop of green laser pointer 
Start from the laser ranging performance from the collimation error and the ability to analyze two aspects of the launch system and the receiving performance of the system that dramatically improves the application of the laser rangefinder. One of the major work is a collimating lens of the design and launch system, the receiving optical system and the use of multiple measurements averaged to reduce the systematic errors. According to the requirements of the semiconductor pulse rangefinder, single lens collimator design. The laser range finder, the center wavelength of 635nm semiconductor diode, the transmit power is 300mW, divergence angle of 42 °. Focal length and aberration curve results simulated by the ZEMAX software, I finally selected 25.8577mm focal length, thus ensuring minimum aberration.The assembling area of  green laser pointer is within the workshop
Some unique advantages of semiconductor lasers make it very suitable for military applications, such as field ranging, guns, etc., aimed at the shooting simulation system, blindness, guided submarine communication, fuses, security and other. Due to the use of ordinary electric bulbs drive, portable weapons and equipment configurations possible. Has been developed and put on the market, the band of the semiconductor laser 370nto, 390r Shan the 405r Shan, 430nto, 480hm, 635r dish, 650hm, 670hm, 780hm, 808nm, 850hm, 980rm, 1310hm, 1550hm, etc., which 1310hm 1550hm main for optical fiber communications. 405nm in a 670n. To visible light 780nm a 1550hm, for the infrared light, 390rm a 370hm ultraviolet wavelengths.