基于Dyson结构的新型快照式分光成像系统光学设计  

Optical Design of Novel Snapshot Spectral Imaging System Based on Dyson Structure

作　　者：谭奋利 曾晨欣 冯安伟 赵世家 季轶群 Tan Fenli;Zeng Chenxin;Feng Anwei;Zhao Shijia;Ji Yiqun(School of Optoelectronic Science and Engineering,Soochow University,Suzhou,Jiangsu 215006,China;Jiangsu Key Laboratory of Advanced Optical Manufacturing Technologies,Soochow University,Suzhou,Jiangsu 215006,China;Key Laboratory of Modern Optical Technologies,Ministry of Education,Soochow University,Suzhou,Jiangsu 215006,China)

机构地区：[1]苏州大学光电科学与工程学院,江苏苏州215006 [2]苏州大学江苏省先进光学制造技术重点实验室,江苏苏州215006 [3]苏州大学教育部现代光学技术重点实验室,江苏苏州215006

出　　处：《光学学报》2022年第4期149-156,共8页Acta Optica Sinica

基　　金：国家自然科学基金(61405134,61340007);国防基础科研计划(JCKY2018414C013);江苏省自然科学基金(BK20161512);江苏高校优势学科建设工程资助项目(PAPD)。

摘　　要：快照式光谱成像系统可实时获取运动目标的光谱图像,在动态目标跟踪和识别等领域有着迫切的应用需求。快照式光谱成像系统的光谱分辨率与空间分辨率相互制约,针对现有快照式分光成像系统数值孔径小、难以同时实现高光谱分辨率和高空间分辨率的问题,提出了一种基于Dyson同心结构的新型快照式分光成像系统,它具有数值孔径大、成像性能优和结构紧凑等优点;视场离轴和复杂化设计可在保持光学成像性能的同时,增大机械装调空间,具有很好的工程可实施性。优化设计得到的新型快照式分光成像系统的数值孔径达到了0.3,光谱分辨率优于0.54 nm,空间采样点数为112×24。这种高光谱分辨率和高空间分辨率的快照式分光成像系统可为研究对大视场内快速运动目标进行精确探测识别的快照式光谱成像系统提供重要的理论基础。Snapshot spectral imaging systems can obtain spectral images of moving targets in real time,and have urgent application requirements in the field of dynamic target tracking and recognition.The spectral and spatial resolutions of the snapshot spectral imaging system are mutually restricted.The existing snapshot spectral imaging system has a small numerical aperture,and it is difficult to achieve high spectral and spatial resolutions at the same time.This paper proposes a novel snapshot spectral imaging system based on the Dyson concentric structure.It has the advantages of large numerical aperture,excellent imaging performance,and compact structure.Meanwhile,through the off-axis of the field of view and complex design,the optical imaging performance is maintained while the space for mechanical assembly and adjustment is increased,which has good engineering feasibility.The optimized design of the novel snapshot spectral imaging system has a numerical aperture of 0.3,a spectral resolution better than 0.54 nm,and a spatial sampling point number of 112×24.This kind of high spectral and spatial resolution snapshot spectral imaging system can provide an important theoretical basis for the study of the snapshot spectral imaging system for the accurate detection and recognition of fast moving targets in a large field of view.

关 键 词：光学设计 快照式分光成像系统 Dyson同心结构 高光谱分辨率 高空间分辨率 

分 类 号：O439[机械工程—光学工程]