If dot measuring work is processed under quite night vision, nothing can be helpful at all until choosing long wavelength made Berlinlasers 808nm infrared laser diode module. Beginning with wide range output power of 5mW to 400mW, it is not only getting quite high photoelectric ability, but also keeping the most intense and the most stable infrared laser dot alignment as long as 100 meters to 1000 meters in distance.
This 808nm infrared laser diode module is generating invisible IR laser beam from beam aperture. It is just used as an accessory part of night vision device, such as CCD camera, black and white camera or infrared laser camera, it will generate continuous infrared laser dot from beam aperture easily. According to easy connect with DC input power supply, it assures constant and stable IR dot generation for military targeting, laser medical treatment device, surveillance and intelligence system etc.
http://www.berlinlasers.com/808nm-infrared-laser-diode-module