When dot measuring work is processed with a long wavelength made Berlinlasers 808nm infrared dot laser alignment, under professional equipment with night vision illumination device, such as a CCD camera, black and white camera or infrared laser camera, this infrared laser module is making immediate infrared laser light concentration, forming into the clearest infrared reference dot projection in distance easily. This invisible beam emitted 808nm infrared dot laser alignment keeps work with high photoelectric ability up to 80%, after selection of 808nm infrared laser diode within 5mW to 400mW, it is generating highly clear and accurate infrared reference dot projection as long as 100 to 1000 meters in distance easily. Under condition that users are avoiding eye exposure to laser beam aperture, and installing this infrared laser module on correct position and easy connect with an external DC input power supply, within freely installation distance of 0.3 meter to 3 meters, it achieves no mistake dot alignment for military targeting, surveillance, intelligence system etc. http://www.berlinlasers.com/808nm-infrared-dot-projecting-laser-alignment