摘要
随着应用光学领域的蓬勃发展,对于成像光学系统的像质需求越来越高。自由曲面的多设计自由度使其具有优异的像差补偿能力,常被用于高效像差补偿器件,而设计出具有良好像差补偿效果的自由曲面是提升系统像质的关键。这里基于矢量像差理论,介绍了一种针对成像系统像差补偿的Zernike型自由曲面设计方法。并以望远偏心系统作为实例,利用所提出方法设计了该系统的像差补偿自由曲面,并借助空间光调制器开展实验研究。仿真与实验结果均表明,所提出方法能够得到有效补偿望远偏心系统像差的自由曲面,像差补偿后光斑尺寸降低至补偿前的43.9%,其像差补偿效果优于传统标量像差理论优化法设计结果,该方法在自由曲面成像系统设计方面具有一定的应用研究价值。
Objective With the flourishing development of the applied optics,there are higher and higher requirements for the imaging quality of the optical system.With multiple design degrees of freedom,the freeform surface has excellent aberration compensation capability and is widely applied in the imaging system.Thus,it is very important to select a suitable design method and successfully design a freeform surface which can effectively compensate the aberrations.Considering the design requirement of compensating aberrations,it is very appropriate to choose the design methods guided by aberration theory.Nevertheless,the optimization and design method based on classical scalar aberration theory(SAT)may not give a good result because it is mainly applicable to rotational symmetric systems and there is aberration characterization error when the SAT method is used in a non-rotational symmetric system.What's different is that the nodal aberration theory(NAT)can accurately provide the relationship between wave aberration and various terms of Zernike type freeform surfaces.So,if adopting the optimization method guided by NAT,a freeform surface with better aberration compensation ability may be attained.Methods Firstly,on the basis of the wavefront aberration distribution from Zernike type freeform given by NAT,combined with self-developed iterative solution algorithm,a freeform surface optimization and design method guided by NAT is introduced in this paper.Secondly,in order to investigate the NAT optimization method's effect,a decentered telescope system is built as an example and the proposed method is utilized to optimize the freeform surface to compensate the aberrations of the decentered telescope system.Moreover,the aberration compensation experiment for the decentered telescope system is conducted by SLM loading freeform surface phase maps.Finally,the simulation and experimental results demonstrate that the freeform surface optimized by NAT method has better aberration compensation ability compared with that optimized by
作者
解博夫
张帅
李浩然
冯昊
黎达
赵星
Xie Bofu;Zhang Shuai;Li Haoran;Feng Hao;Li Da;Zhao Xing(Institute of Modern Optics Nankai University,Tianjin 300350,China;Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology,Tianjin 300350,China)
出处
《红外与激光工程》
EI
CSCD
北大核心
2023年第7期33-42,共10页
Infrared and Laser Engineering
基金
国家自然科学基金项目(62075106)。
关键词
应用光学
像差补偿
矢量像差理论
自由曲面
applied optics
aberration compensation
nodal aberration theory
freeform surface
