哈特曼原理子口径斜率扫描检测及误差研究

Research on Hartmann principle based on sub-aperture slope scanning detection and error

提出了一种基于哈特曼原理子口径斜率扫描再重构波面的检测方式,研究了一种解决大口径光学系统不同俯仰角下的像质评价的方法。该方法无需同等口径标准镜,通过扫描方式获取波面信息。采用光学软件与数学分析软件通过DDE接口连接进行计算机联合仿真的方式进行探究,仿真光学系统采用主镜Φ720 mm,次镜Φ100 mm的卡塞-格林系统来验证该方法的可行性,利用随机误差注入及多次扫描平均的方法进行了该检测方式中重构波面精度的研究;系统探究了光斑中心提取误差、子口径定位误差、子口径倾斜误差对于该检测方法重构波面精度的影响。给出了该方法仿真结果与光学软件仿真结果的对比,并获取了误差注入时各误差与重构波面精度的物理模型。

A method of detecting reconstructed wavefront was introduced based on Hartmann principle sub-aperture slope scanning to solve image quality evaluation for large aperture optical system at different elevation angles. The method does not need the same size caliber standard mirror. The information of wavefront can be obtained by scanning. The optical software and mathematical analysis software were used to carry out computer simulation through DDE link. The simulation optical system used Cassegrain system with primary mirror 720 mm and secondary mirror 100 mm to verify the feasibility of this method. Random error inducing and multiple scanning averaging were used to study the accuracy of reconstructed wavefront. The error included spot centroid error, sub-aperture positioning error and sub-aperture tilt error. The comparison between the simulation results and the results of optical software was given, and the physical models of errors and reconstructed wavefront accuracy during error injection were obtained.