从分辨率、对比度、照度三个因素出发，根据指标要求，详细制定了可见光成像系统作用距离测试方案。在试验中，为了满足目标作用距离20 km 的要求，将考核目标等效为4.5 km 远的等效目标大小；在实际的11 km 大气能见度条件下，将考核照度和对比度转换为试验目标目标值。在目标照度不小于300 lux 的环境下，可见光成像系统能够识别对比度大于0.253 的考核目标；在考核目标对比度为0.2~0.253，300 lux 低照度时，目标是不能确认的。通过对试验结果进一步图像处理发现，目标靶标是可分辨的。试验结果表明，系统设计满足指标要求。

An experiment is designed to validate the visible imaging system′ s performance through analyzing the effects of resolution, contrast and the illumination. The effective targets at a distance of about 4.5 km are tested instead of 20 km. Under conditions of 11 km visibility, the equivalent detection range is figured out by means of contrast and illumination. If the target′ s illumination is not less than 300 lux, the system can identify the target with 0.253 contrast, but it is not sure when the contrast is between 0.2 and 0.253. With special image processing, the result is significantly improved. Experimental results show that the system′ s performance can meet the special requirements.