利用红外波长的激光对微光系统进行辅助照明，改善目标区域的环境照度和对比度，使目标从视场中凸显出来，提高微光系统的探测距离，改善观察效果。采用距离选通技术，合理匹配激光脉冲与选通像增强器的工作时序，屏蔽目标前后非目标反射光以及来自大气中悬浮微粒产生的杂散光干扰，解决同轴照明后向散射问题，达到只观察选定距离内目标的目的。通过微光选通望远镜的工程实践，将激光距离选通技术成功地运用于微光探测领域中，在无月星光，照度为1×10-3lx，大气能见度为10 km条件下，对中型坦克或卡车侧面目标的识别距离可达到1 400 m。

Under the help of auxiliary lighting on low-light level system by using laser with infrared wavelength, environmental illumination and contrast of object area can be improved, making the object outstand from vision area, which can effectively enlarge the range of low-light detection and improve the observation effects. Adopting range gating technology, properly arranging the work order between laser pulse and gated image intensifier, shielding the object from troubling by inflected light around the object and stray light from airborne suspended particulates, solving coaxial illumination back scattering problem, the object only from the selected range can be observed. Through engineering practices of laser assistant low-light level binoculars, the range gating technology is successfully applied to low-light detecting area, and the recognizable range for medium tank and the truck broadside is up to 1 400 m under simple background conditions, without moonlight or starlight, with illumination of 1×10-3lx and atmosphere visibility of 10 km.