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为满足在10 000m左右高空摄影时地面分辨率达到0.2m的需要,采用长焦距和折反射式光路形式设计一种高分辨率CCD航摄物镜。使用普通玻璃校正由大口径和长焦距带来的二级光谱,且在单个像元尺寸为8μm的36mm×48mm大面阵、高分辨率CCD作为接收器的条件下,光学系统在60lp/mm处各视场的传递函数均接近衍射极限,满足成像质量要求,最终实现了在470nm～950nm宽波段工作范围内能够进行全天侯观察与测量。
In order to meet the need of the ground resolution of 0.2m at about 10 000 m high-altitude photography, a high-resolution CCD aerial photography objective lens is designed by adopting the long focal length and catadioptric optical path. Using ordinary glass to correct the secondary spectrum caused by the large aperture and the long focal length, and under the condition of a 36mm x 48mm large area array with a single cell size of 8μm and a high-resolution CCD as a receiver, the optical system operates at 60lp / mm The transfer function of each field of view is close to the diffraction limit, to meet the imaging quality requirements, and ultimately achieved in 470nm ~ 950nm wide band operating range to observe and measure all-weather.