In special night version precise dot measuring work fields, long wavelength device of 808nm infrared dot laser alignment always makes sure of high intensity infrared laser light emission and highly clear infrared reference dot projection. It is operating as an accessory part, equipping with night version device and constant power source of DC power supply. Only if it gets proper use of output power and adjustment of laser beam focus, this infrared laser gets concentrated infrared laser light and high precision IR dot generation for military targeting, infrared laser sight, night hunting, surveillance and lab experiment etc.
https://www.berlinlasers.com/808nm-infrared-dot-projecting-laser-alignment