光学学报, 2016, 36 (7): 0708001, 网络出版: 2016-07-08   

偏轴自由曲面光学系统像差特性研究 下载: 632次

Aberration Properties of Off-Axis Freeform Surface Optical System
作者单位
1 长春理工大学空间光电技术研究所, 吉林 长春 130022
2 中国科学院长春光学精密机械与物理研究所光学系统先进制造技术重点实验室, 吉林 长春 130033
摘要
基于矢量像差理论,提出了以Fringe Zernike多项式为表征函数的偏轴自由曲面光学系统像差分析方法,推导了偏轴自由曲面系统的三阶像散和彗差解析表达式,分析了自由曲面对偏轴系统像差节点分布的影响。根据像差分布特性,有针对性地选取和优化Zernike系数,设计了一个偏轴两反自由曲面长波红外光学系统,系统有效焦距为500 mm,口径为300 mm,采用384 pixel×288 pixel非制冷红外探测器接收,像素大小为25 μm。优化后的系统三阶像散和彗差节点被重新移至视场中,平衡了系统偏轴引起的非对称像差,系统成像质量接近衍射极限,满足使用需求。
Abstract
Based on the vector aberration theory, a method to analyze aberration field distribution induced by the Fringe Zernike polynomial off-axis freeform surface is proposed. The analytical expressions of third-order astigmatism and coma of off-axis freeform surface system are deduced. The aberration nodal distribution of off-axis system caused by the freeform surface is analyzed. According to the aberration distribution properties, with proper Zernike terms selected and optimized, an off-axis two-mirror freeform surface long-wave infrared optical system is designed, and the system has an effective focal length of 500 mm and a pupil diameter of 300 mm. The system is compatible with the uncooled infrared detector that has a format of 384 pixel×288 pixel, and the pixel size is 25 μm. The third-order astigmatism and coma nodes of the optimized system are both moved into the field of view, the asymmetric aberration induced by off-axis is balanced, and the imaging quality of the system is close to the diffraction limit that meets application requirements.

史浩东, 张新, 王灵杰, 王超, 姜会林. 偏轴自由曲面光学系统像差特性研究[J]. 光学学报, 2016, 36(7): 0708001. Shi Haodong, Zhang Xin, Wang Lingjie, Wang Chao, Jiang Huilin. Aberration Properties of Off-Axis Freeform Surface Optical System[J]. Acta Optica Sinica, 2016, 36(7): 0708001.

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