激光辅助照明在电视观瞄具逆光成像上的应用

针对机载光电装备的电视观瞄具对逆光物体进行观瞄时，光亮度剧烈变化，会产生光晕，无法捕获有用细节这一问题，提出利用激光辅助照明成像方案提高物体在激光波段的照度。在观瞄逆光物体时，一方面通过降低相机的曝光时间降低相面照度，另一方面采用激光辅助照明，对逆光物体进行激光照射。通过实验，电视系统能够对激光的照射进行成像，逆光物体的图像边缘灰度差达到55，满足边缘检测的要求，能够分辨物体边缘信息。

Application of laser auxiliary illumination on TV assembly backlight imaging

When the TV sight of airborne EO device is viewing the backlighting object, the brightness changes dramatically, which can produce image blooming,so the system is unable to capture useful details.Aiming at the problem, we proposed a scheme to solve the image blooming by utilizing the laser auxiliary illumination. When the equipment observed the backlighting object, the designator illuminated a laser of a certain frequency to irradiate the object,meanwhile, the exposure time of camera was reduced so as to decrease the illumination. Experiment shows that the TV system can format a image of laser irradiation，the histogram difference of the image edge is about 55,which meets the demand of edge detection, and the edge information can be distinguished.