中国激光, 2015, 42 (10): 1008001, 网络出版: 2022-09-24   

大口径离轴非球面补偿检测的畸变校正

Distortion Mapping Correction in Testing of Large Off-Axis Aspherical Mirrors with Null Lens
作者单位
1 中国科学院长春光学精密机械与物理研究所, 吉林 长春 130033
2 中国科学院大学, 北京 100049
摘要
提出了一种基于检测光路光线追迹的畸变校正方法。通过对面形图边界的提取和分析确定图像中畸变的对称中心位置和对检测波前的采样间隔,利用光线追迹建立镜面到检测结果的对应关系,从而校正面形分布的畸变。针对某大口径离轴三反光学系统的730 mm×268 mm 离轴非球面主镜的补偿检测,完成了面形图的畸变校正,校正前后二值化面形图与二值化镜面图的标准化互相关函数最大值从0.925提升至0.985,校正效果明显。
Abstract
A distortion correction method based on ray tracing of test optics is proposed. The position of the symmetric distortion center and the sampling interval of the test wavefront are solved by extraction and analysis of the surface boundary, then the relationship between the mirror under test and the surface map is established by ray tracing to correct the distortion. The 730 mm ×268 mm primary mirror of an off-axis threemirror optical system is tested by null lens, and this method is applied to correcting the distortion of the surface maps. After correction the maximum of the standard correlation function between the binary map and the binary mirror image increases from 0.925 to 0.985, the improvement is conspicuity.

陈哲, 张星祥, 陈长征, 任建岳. 大口径离轴非球面补偿检测的畸变校正[J]. 中国激光, 2015, 42(10): 1008001. Chen Zhe, Zhang Xingxiang, Chen Changzheng, Ren Jianyue. Distortion Mapping Correction in Testing of Large Off-Axis Aspherical Mirrors with Null Lens[J]. Chinese Journal of Lasers, 2015, 42(10): 1008001.

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