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在应用坐标系变换方法实现星载TDICDD相机星下点扫描像移模型的基础上,将45°旋转扫描反射镜(以下简称45°镜)用于TDICCD相机成像以扩大扫描视场。首先深入分析了45°镜的成像特性及K镜消像旋的原理,并利用Matlab对K镜消像旋效果进行仿真,验证了加入K镜的合理性。然后利用45°镜及K镜对光矢量的转换矩阵,建立了TDICCD相机方位扫描时的像移模型,为后续像移分析提供理论依据。
On the basis of the star point scanning imaging model of satellite TDCDDD camera using the coordinate system transformation method, a 45 ° rotating scanning mirror (hereinafter referred to as 45 ° mirror) is used for TDICCD camera imaging to expand the scanning field of view. First of all, the imaging characteristics of 45 ° mirror and the principle of K-mirror eliminating image are analyzed in-depth. The effect of K-mirror eliminating image rotation is simulated by Matlab, which verifies the rationality of adding K mirror. Then, using the conversion matrix of 45 ° mirror and K-mirror to light vector, the image shift model of TDICCD camera in azimuth scanning is established, which provides a theoretical basis for subsequent image shift analysis.