应用于多元探测器遥感仪的45°二维扫描镜像旋分析

Analysis of the Imaging Rotate of the 45°Scanning Mirror

航天遥感仪器中,为扩大观测范围通常采用45°反射镜扫描方案。当扫描反射镜绕轴旋转对物进行扫描时,随着反射镜的转角不同,物体反射像也将绕观测轴进行旋转。在采用多元探测器的遥感仪器中,焦平面上所成的像不允许产生像旋,否则会使各个像元所对应的视场无法配准。因此研究相应的像消旋方法,消除45°反射镜带来的像旋转,使其在采用多元探测器的遥感仪器中更好的发挥作用,已是一个十分迫切的问题。对扫描反射镜转动时,多元探测器不同像元的像旋进行分析,为像消旋提供一种方法。

People often use a scanner which can tilt about different axis to acquire large field. When the scanner rotate around axes which arent parallel to the scanners surface, the image rotate on the detector too. This paper discusses a method which can calculate the image rotating angle of different pixel on the detector array.