对于低轨道空间目标，易受到地影影响，使地面光学测量系统无法实现对地影目标光学观测，影响目标光学观测弧段和数据量。激光照亮技术为主动探测，利用地面激光跟踪与测量系统，向地影中目标发射激光束，望远镜及电荷耦合器件(CCD)相机接收目标返回的激光信号，达到CCD探测阈值，获取目标图像信息。采用了532 nm波长激光作为地面光源，开展对地影中带激光反射器卫星激光主动照亮，验证技术方法可行性。根据地面系统参数，理论分析了CCD的激光回波信号信噪比、卫星激光照亮星等。利用图像灰度对比法，获得了实验中所照亮卫星的视星等，并与理论计算结果进行了比较，验证了理论与实验方法的合理性。

Low earth orbit space targets is more impressionable to the shadow of earth, which makes the ground optical observation system unable to realize the optical observation and posts the influences on the optical measurement data. As the active detection technology, laser active illumination is to use laser track and observation system on ground and transmit the laser beam to space targets within the shadow of earth. The receiving telescope and charge coupled devices (CCD) camera on ground receive and detect the laser echoes from targets and obtain the images if the requirements of CCD detecting threshold is meet. The laser signal with 532 nm wavelength is adopted as the light sources and the observations of laser active illumination to artificial satellites with the retro-reflectors within the shadow of earth are successfully implemented to validate the feasibility of measurement technology. According to the parameters of laser track and observation system on ground, the theoretical analysis of the signal noise ratio of CCD and the magnitude of illuminated satellites are also performed. Based on the image processing method of gray correlation, the measured magnitude of laser illumination to satellites is obtained and compared to the results of theoretical calculation, which verifies the rationality of theoretical and experimental methods.