高分辨率空间光学系统位置误差的无波前传感综合校正  

Precisely Integrated Wavefront Sensorless Calibration of High-Resolution Space Optical System with Large Position Errors

作　　者：韩杏子[1] 胡新奇[1] 俞信[1] 

机构地区：[1]北京理工大学光电学院,北京100081

出　　处：《光学学报》2011年第6期264-269,共6页Acta Optica Sinica

基　　金：国家973计划(2009CB724006)资助课题

摘　　要：高分辨率三反射式空间光学系统的三个镜子之间的相对位置误差会影响整个系统的性能,需要进行空间在轨调校。提出一种新的无波前传感综合校正方法,将随机并行梯度下降算法、相位变更法和灵敏度矩阵反演法相结合,既保留了灵敏度矩阵反演法的校正精度,又大大提高了可校正误差的动态范围。该方法无须使用波前传感器,系统简单,实现容易。对一个典型的三反射式空间光学系统进行了大动态范围位置误差在轨综合校正的计算机仿真,结果表明,该方法大大提高了可校正误差范围,同时实现了很高的校正精度。Relative position errors among mirrors in a three-mirror reflective system can seriously degrade the performance of the whole space optical remote sensing system, so we have to calibrate these errors in orbit. A new wavefront sensorless calibrating method that integrates stochastic parallel gradient descent control algorithm, phase- diversity method and sensitive matrix inversion algorithm is proposed. This method retains the high resolution of sensitive matrix inversion algorithm and largely increases the dynamic range of stochastic parallel gradient descent control algorithm. Additionally, it does not need wavefront sensors to measure the wavefront error, thus simplifies the whole system, making it more feasible. Through computer simulation of a typical high-resolution space optical system in orbit and calibration of its relative position errors of the three mirrors using this integrated method, significantly improved calibrating range and high calibration precision are demonstrated, thus the merits of the new method are proved.

关 键 词：光学遥感 在轨调校 无波前传感法 随机并行梯度下降算法 相位变更法 灵敏度矩阵反演法 

分 类 号：TB133[机械工程—光学工程]