当空间可见光相机对地物目标进行成像时, 视场内外的辐射会引起像面上产生 杂散辐射, 从而降低相机的成像质量, 严重时可能会造成相机无法正常工作。为了提高相机的成像性能, 介绍了可见光系统中杂散光的产生机理及其抑制措施, 建立了相机的光机模型, 分析了系统的杂散 光, 改进了遮光系统的设计。利用建立的杂光系数测量装置测量了相机镜头的杂光系数, 并验证了建模分 析结果。

When a spaceborne visible camera is imaging the objects on the ground, the radiation both inside and outside its field of view may bring stray light to the image plane of it. The stray light may degrade the imaging quality of the camera and even affect the normal operation of the camera. To improve the imaging performance of the camera, the generation mechanism and suppression measures of the stray light in a visible light system are presented. An optical and mechanical model of the camera is established. The stray light in the system is analyzed. The design of the baffle system is improved. Finally, a stray light measurement setup is used to measure the veiling glare index of the camera lens. Thus, the modeling analysis result is verified.