Optical design of visual and infrared large-aperture imaging system based on a space-based platform
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摘要: 针对用于地球静止轨道卫星的遥感面阵快照式成像光谱仪传输数据量过大引起的数据传输困难，信号采集处理时间长的问题，利用地球静止轨道平台可以长期驻留固定区域上空的特点，提出采用压缩感知的大口径全谱段快照式光谱仪的方案。对其光学系统结构进行设计，并对相关参数进行了计算。物镜采用同轴三反式无焦系统，用分色片对系统分光，经过对各系统优化处理，最终获得了幅宽为400 km◊400 km，可见光分地面像元分辨率为40 m，中波红外地面像元分辨率为400 m，长波红外地面像元为625 m的光学系统，设计结果MTF可见光路在78.125 lp/mm高于0.455，中波红外光路在33.3 lp/mm高于0.518，长波红外光路在20.8 lp/mm高于0.498；系统光谱分辨率分别为可见光20 nm、中波红外50 nm、长波红外光150 nm；可见光路二级光谱小于0.05 mm，设计结果具有良好的成像质量，各部分光学系统成像质量接近衍射极限，设计结果满足应用和指标需求。Abstract: To solve the data transmission difficulties and long-signal acquisition and processing time problem caused by excessive data transmission of the Geostationary Orbit array staring spectrometer, a scheme for a large-aperture visual and infrared snapshot spectrometer based on compressive sensing is proposed, which takes advantage of the fact that a geostationary orbit platform can stay over the fixed area for a long time. This paper analyzes the physical model of compressive sensing spectral imaging. The structure of the optical system is designed, and the relevant parameters are calculated. The objective lens uses a coaxial three-mirror afocal optical system, and dichroic films are used to split the spectrum. The relevant parameters were calculated according to requirements and the system was designed using optical software. After optimization, the optical system was shown to have a width of 400 km◊400 km, a visible area of 40 m GSD, an MWIR area of 400 m GSD, and an LWIR area of 625 m GSD. The results show that the MTF of the visible area is higher than 0.455 at 78.125 lp / mm. In mid-wave infrared, the MTF is higher than 0.518 at 33 lp / mm, and the MTF is higher than 0.498 at 20.8 lp / mm in long-wave infrared. The spectral resolution of the visible light is 20 nm, the mediumwave infrared region’s resolution is 50 nm, and the long-wave infrared spectrum resolution is 150 nm. The second-order spectrum of the visual area is less than 0.05 mm. The optical system has good imaging performance and the imaging quality of each part of the optical system is close to the diffraction limit, which meets the needs of applications and indicators.
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图 1 压缩感知光谱成像系统原理图
Figure 1. Schematic diagram of a compressive sensing spectral imaging system
图 2 基于压缩感知的大口径全谱段光谱仪物理模型
Figure 2. Physical model of the visual and infrared large-aperture multispectral sensor based on compressive sensing
图 14 不同视场下可见光路光谱分辨率
a)ω=0.33° b)ω=0.2334° c)ω=0.2° d)ω=0°
Figure 14. Spectral resolution of the visible spectrum in different fields of view
a)ω=0.33° b)ω=0.2334° c)ω=0.2° d)ω=0°
图 15 可见光系统谱线弯曲示意图
Figure 15. Schematic diagram of spectral smile of the visual spectrum
图 24 中波红外光谱分辨率
a)ω=0.33° b)ω=0.2334° c)ω=0.2° d)ω=0°
Figure 24. Spectral resolution of the MWIR part in different fields of view
a)ω=0.33° b)ω=0.2334° c)ω=0.2° d)ω=0°
图 25 中波红外系统谱线弯曲示意图
Figure 25. Schematic diagram of the spectral smile of the MWIR part
图 34 不同视场下长波红外光路分辨率
a)ω=0.26° b)ω=0.184° c)ω=0.140° d)ω=0°
Figure 34. Spectral resolution of the LWIR part from different fields of view
a)ω=0.26° b)ω=0.184° c)ω=0.140° d)ω=0°
表 3.4 子系统参数
可见光一次会聚光路/准直光路 中波红外一次会聚光路/准直光路 长波红外一次会聚光路/准直光路 系统焦距/mm 900/534 1350/137 1375/124 光栅线对数lp/mm 170 50 45 
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戴立群, 唐绍凡, 徐丽娜, 等. 从可见光到热红外全谱段探测的星载多光谱成像仪器技术发展概述[J]. 红外技术,2019,41(2):107-117.DAI L Q, TANG SH F, XU L N, et al. Development overview of space-borne multi-spectral imager with band range from visible to thermal infrared[J]. Infrared Technology, 2019, 41(2): 107-117. (in Chinese 马文坡, 练敏隆. “高分四号”卫星凝视相机的技术特点[J]. 航天返回与遥感,2016,37(4):26-31. doi: 10.3969/j.issn.1009-8518.2016.04.004MA W P, LIAN M L. Technical characteristics of the staring camera on board GF-4 satellite[J]. Spacecraft Recovery &Remote Sensing, 2016, 37(4): 26-31. (in Chinese doi: 10.3969/j.issn.1009-8518.2016.04.004 陶家生, 孙治国, 孙英华, 等. 静止轨道高分辨率光学遥感探索[J]. 光电工程,2012,39(6):1-6. doi: 10.3969/j.issn.1003-501X.2012.06.001TAO J SH, SUN ZH G, SUN Y H, et al. Exploration of high resolution optical remote sensing of the geostationary orbit[J]. Opto-Electronic Engineering, 2012, 39(6): 1-6. (in Chinese doi: 10.3969/j.issn.1003-501X.2012.06.001 罗秀娟, 刘辉, 张羽, 等. 地球同步轨道暗弱目标地基光学成像技术综述[J]. 中国光学,2019,12(4):753-766. doi: 10.3788/co.20191204.0753LUO X J, LIU H, ZHANG Y, et al. Review of ground-based optical imaging techniques for dim GEO objects[J]. Chinese Optics, 2019, 12(4): 753-766. (in Chinese doi: 10.3788/co.20191204.0753 黄思婕. 地球静止轨道大动态范围信息获取技术研究[D]. 上海: 中国科学院研究生院(上海技术物理研究所), 2015.HUANG S J. Research on the technology of geosynchonous orbit high dynamic range information acquisition[D]. Shanghai: Shanghai Institute of Technical Physics of the Chinese Academy of Sciences, 2015. (in Chinese). 刘铭鑫. 基于压缩感知的编码孔径光谱成像技术研究[D]. 长春: 中国科学院大学(中国科学院长春光学精密机械与物理研究所), 2019.LIU M X. Research on coded aperture spectral imaging technology based on compressed sensing[D]. Changchun: Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 2019. (in Chinese). 钱路路. 计算光谱成像技术研究[D]. 合肥: 中国科学技术大学, 2013.QIAN L L. Research on computational imaging spectroscopy[D]. Hefei: University of Science and Technology of China, 2013. (in Chinese). 闫歌, 许廷发, 马旭, 等. 动态测量的高光谱图像压缩感知[J]. 中国光学,2018,11(4):550-559. doi: 10.3788/co.20181104.0550YAN G, XU T F, MA X, et al. Hyperspectral image compression sensing based on dynamic measurement[J]. Chinese Optics, 2018, 11(4): 550-559. (in Chinese doi: 10.3788/co.20181104.0550 韩庆, 王健, 熊峥, 等. 用于长波红外目标模拟器的DMD衍射特性分析[J]. 红外与激光工程,2017,46(5):93-99.HAN Q, WANG J, XIONG ZH, et al. Diffraction characteristics analysis for DMD-based scene projectors in the long-wave infrared[J]. Infrared and Laser Engineering, 2017, 46(5): 93-99. (in Chinese 吕伟振, 刘伟奇, 魏忠伦, 等. 基于DMD的高动态范围成像光学系统设计[J]. 红外与激光工程,2014,43(4):1167-1171. doi: 10.3969/j.issn.1007-2276.2014.04.026LV W ZH, LIU W Q, WEI ZH L, et al. Design of high dynamic range imaging optical system based on DMD[J]. Infrared and Laser Engineering, 2014, 43(4): 1167-1171. (in Chinese doi: 10.3969/j.issn.1007-2276.2014.04.026 孙永强, 胡源, 王月旗, 等. 数字微镜器件在会聚成像光路中的像差分析[J]. 光学学报,2019,39(3):0311001. doi: 10.3788/AOS201939.0311001SUN Y Q, HU Y, WANG Y Q, et al. Analysis on aberration of digital micromirror device in convergent imaging path[J]. Acta Optica Sinica, 2019, 39(3): 0311001. (in Chinese doi: 10.3788/AOS201939.0311001 刑振冲. 灵巧型长焦多波段共口径光学系统的研究[D]. 长春: 中国科学院大学(中国科学院长春光学精密机械与物理研究所), 2018.XING ZH CH. Research on miniature telefocal multiband common aperture optical system[D]. Changchun: Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 2018. (in Chinese). 张天一, 朱永田, 侯永辉, 等. LAMOST高分辨率光谱仪研制[J]. 中国光学,2019,12(1):148-155. doi: 10.3788/co.20191201.0148ZHANG T Y, ZHU Y T, HOU Y H, et al. Construction of a LAMOST high resolution spectrograph[J]. Chinese Optics, 2019, 12(1): 148-155. (in Chinese doi: 10.3788/co.20191201.0148 曹佃生, 林冠宇, 杨小虎, 等. 紫外双光栅光谱仪结构设计与波长精度分析[J]. 中国光学,2018,11(2):219-230. doi: 10.3788/co.20181102.0219CAO D SH, LIN G Y, YANG X H, et al. Structure design and wavelength accuracy analysis of ultraviolet double grating spectrometer[J]. Chinese Optics, 2018, 11(2): 219-230. (in Chinese doi: 10.3788/co.20181102.0219 潘君骅. 光学非球面的设计、加工与检验[M]. 苏州: 苏州大学出版社, 2004.PAN J H. The Design, Manufacture and Test of the Aspherical Optical Surfaces[M]. Suzhou: Suzhou University Press, 2004. (in Chinese). 孙武, 韩诚山, 吕恒毅, 等. 推扫式多光谱遥感相机动态范围拓展方法[J]. 中国光学,2019,12(4):905-912. doi: 10.3788/co.20191204.0905SUN W, HAN CH SH, LV H Y, et al. Dynamic range extending method for push-broom multispectral remote sensing cameras[J]. Chinese Optics, 2019, 12(4): 905-912. (in Chinese doi: 10.3788/co.20191204.0905 袁立银, 谢佳楠, 侯佳, 等. 紧凑型红外成像光谱仪光学设计[J]. 红外与激光工程,2018,47(4):186-191.YUAN L Y, XIE J N, HOU J, et al. Optical design of compact infrared imaging spectrometer[J]. Infrared and Laser Engineering, 2018, 47(4): 186-191. (in Chinese 胡斌, 黄颖, 马永利, 等. 高分辨率红外成像仪五反无焦主系统设计[J]. 红外与激光工程,2016,45(5):0518001. doi: 10.3788/irla201645.0518001HU B, HUANG Y, MA Y L, et al. Design of five-mirror afocal principal system for high spatial resolution infrared imager[J]. Infrared and Laser Engineering, 2016, 45(5): 0518001. (in Chinese doi: 10.3788/irla201645.0518001 张营. 长波红外高光谱成像仪光学技术研究[D]. 上海: 中国科学院研究生院(上海技术物理研究所), 2016.ZHANG Y. Optical technology of long-wave infrared hyperspectral imaging[D]. Shanghai: Shanghai Institute of Technical Physics of the Chinese Academy of Sciences, 2016. (in Chinese). 韩军, 李殉, 吴玲玲, 等. 一种光栅型成像光谱仪光学系统设计[J]. 应用光学,2012,33(2):233-239.HAN J, LI X, WU L L, et al. Optical system design of grating-based imaging spectrometer[J]. Journal of applied Optics, 2012, 33(2): 233-239. (in Chinese -
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