Author Affiliations
Abstract
1 Key Laboratory of Computational Optics Imaging Technology, Chinese Academy of Sciences, Beijing 100094, China
2 University of Chinese Academy of Sciences, Beijing 100049, Beijing
3 Brussel Photonics, Department of Applied Physics and Photonics, Vrije Universiteit Brussel, 1050 Ixelles, Belgium
4 King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
5 The University of British Columbia, Vancouver V6T 1Z4, Canada
The conventional optical system design employs combinations of different lenses to combat aberrations, which usually leads to considerable volume and weight. In this Letter, a tailored design scheme that exploits state-of-the-art digital aberration correction algorithms in addition to traditional optics design is investigated. In particular, the proposed method is applied to the design of refractive telescopes by shifting the burden of correcting chromatic aberrations to software. By enforcing cross-channel information transfer in a post-processing step, the uncorrected chromatic aberrations are well-mitigated. Accordingly, a telescope of F-8, 1400 mm focal length, and 0.14° field of view is designed with only two lens elements. The image quality of the designed telescope is evaluated by comparing it to the equivalent designs with multiple lenses in a traditional optical design manner, which validates the effectiveness of our design scheme.
220.4830 Systems design 220.1010 Aberrations (global) 200.4740 Optical processing 100.2980 Image enhancement Chinese Optics Letters
2019, 17(5): 052201
1 中国科学院光电研究院中国科学院计算光学成像技术重点实验室, 北京 100094
2 中国科学院大学, 北京 100049
为适应机载高光谱成像系统的发展需要，设计了一种机载大视场高光谱成像系统。前置望远系统为大视场宽谱段透射式系统，高光谱成像仪为基于Offner次镜的改正型Féry棱镜中继系统。系统设计过程中两次使用Zemax多重组态设计；尝试将Offner次镜的改正型Féry棱镜设计为高光谱成像仪；将Féry棱镜高光谱成像仪集成为高光谱成像系统进行一体化系统分析。该设计在结构和设计方法上均有改进。设计的大视场可见近红外高光谱成像系统视场可达28°，机载载荷高度为5 km时，全系统的刈幅宽度为2.493 km，地面分辨率可达0.6 m。左半视场和右半视场全谱段调制传递函数均大于0.6，最大谱线弯曲和谱带弯曲不到0.2 pixel，成像质量接近衍射极限。
成像系统 大视场 高光谱成像仪 Féry棱镜 多重组态
1 中国科学院光电研究院, 北京 100094
2 中国科学院大学, 北京 100049
基于一种固体马赫曾德尔(Mach-Zehnder)成像光谱仪，从理论上严格推导了其光谱反演模型，通过该光谱反演模型着重分析了反射面平移误差对系统光谱反演带来的影响。运用Zemax软件建立了成像光谱仪的仿真模型，并运用该仿真模型对固体马赫曾德尔成像光谱系统光谱反演及平移误差推导结果进行了仿真验算。理论推导及仿真结果表明，固体马赫曾德尔成像光谱仪中反射面的平移误差将对系统的光谱反演结果带来影响，并且光谱的反演误差与两路剪切分光光路中反射面平移误差的总和相关。因此，在固体马赫曾德尔成像光谱仪的研制过程中，需要严格控制两路平移误差的总和，或通过适当的补偿遏制其对测量结果的影响，提高系统的光谱测量精度。
光谱学 干涉成像光谱技术 光谱反演模型 平移误差 傅里叶变换 Zemax验证 马赫曾德尔成像光谱仪
