二维扫描镜轴系非正交分析

二维扫描镜绕两轴摆动,实现大的扫描视场。其两维摆角由与扫描镜连接的两个编码器读出。二维扫描镜轴系的非正交性会导致扫描镜实际摆角与编码器显示角不相吻合,从而导致物方指向范围偏差。在利用经纬仪测量扫描镜摆角的测试思想基础上对二维扫描镜轴系非正交的影响进行分析,给出了一种计算扫描镜轴系非正交公差的方法。

Analysis of the shaft un-orthogonality of the scanning mirror

Usually the field of view of an aerocamera is very narrow, in order to acquire large field, people often use a scanner which can tilt and point other areas. When the scanner rotate about two (un-orthogonal) shaft, the pointer error will be produced. This paper based on the vector theory of optical reflection and the testing thought using theodolite, discusses the relation between the un-orthogonal angle of two rotate shaft and the point error.