宽波段折反射式航空相机设计

Wide-Band Folded-Reflective Aerial Camera

为了在15000m平流层实现对地全天候观测,满足工作波段470~1500nm对地分辨率达到0.1m的要求,设计了一种长焦距折反式高分辨率CCD航空相机。通过使用H-ZK7与ZF6搭配,对长焦距和大孔径产生的二次光谱进行校正,倍率色差控满足设计要求。通过对光学系统热分析,分析出系统在不同高度下温度变化对成像质量的变化曲线。探测器采用徕卡公司M9全画幅CCD探测器,其单像元为8μm,靶面尺寸为48 mm×36 mm;系统在100 lp/mm时达到衍射极限,满足系统成像要求。

To achieve all-weather observations in the 15000 m stratosphere and meet the ground resolution of 470-1500 nm,a long-forward charge-coupled device(CCD)aerial camera was proposed.By correcting the secondary spectra generated by the long focal length and large aperture using H-ZK 7 with ZF6,the rate color difference control meets the design requirements.The temperature curve of the system at different heights was analyzed via thermal analysis of the optical system.The detector adopted a full-frame CCD detector with a single image element of 8μm and a target surface size of 48 mm×36 mm;the system reached the diffraction limit at 100 lp/mm,fulfilling the imaging requirements of the system.