Citation: | LI Yang, WANG Baohua, ZHANG Xuguo, LONG Liang, ZHOU Ziwei, LI Linpeng. Design of Cooled Large-Relative Aperture Long-Wavelength Infrared Optical System[J]. Infrared Technology , 2025, 47(3): 265-271. |
A cooled long-wavelength infrared imaging optical system is proposed and designed for a 320×256 long-wavelength refrigerated area array detector. The optical system is composed of five lenses, and the system is designed with different material combinations and a back-focus adjustment mechanism to achieve clear imaging in the operating temperature of -40℃ to 70℃. The working spectrum of the optical system is 7.5-9.5 μm. The focal length is 50 mm; the relative aperture is 1/2; and the full field of view is 11°×8.8°. This system has the advantages of a simple structure, large relative aperture, and high transmittance. Design results show that the modulation transfer function (MTF) of the optical system is better than 0.594 at a Nyquist frequency of 16.7 lp/mm, and the root mean square size is smaller than the single pixel size. Energy concentration is better than 88.5% within the pixel size, and distortion is less than 0.23%. After setting a tolerance, the MTF of the system was better than 0.504, indicating that the system is easy to process, has high realizability, and exhibits good imaging performance after assembly.
[1] |
陈潇. 大面阵长波红外光学无热化镜头的设计[J]. 红外技术, 2018, 40(11): 1061-1064. http://hwjs.nvir.cn/article/id/hwjs201811007
CHEN Xiao. Design of long-wavelength infrared athermalization lens for large-array detector[J]. Infrared Technology, 2018, 40(11): 1061-1064. http://hwjs.nvir.cn/article/id/hwjs201811007
|
[2] |
汤天瑾. 无热化大相对孔径星敏感器光学系统设计[J]. 航天返回与遥感, 2011, 32(3): 36-42.
TANG Tianjin. Design of athermalizing dual-band compound optical system[J]. Spacecraft Remote Sensing, 2011, 32(3): 36-42.
|
[3] |
王保华, 刘英, 孙强, 等. 折射/衍射混合长波红外连续变焦光学系统设计[J]. 红外与激光工程, 2013, 42(1): 148-153. DOI: 10.3969/j.issn.1007-2276.2013.01.027
WANG Baohua, LIU Ying, SUN Qiang, et al. Optical design for refractive/diffractive long wavelength infrared continuous zoom system[J]. Infrared and Laser Engineering, 2013, 42(1): 148-153. DOI: 10.3969/j.issn.1007-2276.2013.01.027
|
[4] |
李福东. 小型星载红外相机的研制[J]. 航天返回与遥感, 2004, 25(1): 21-25.
LI Fudong. Research and development of infrared camera onboard minisatellites[J]. Spaecraft Remote Sensing, 2004, 25(1): 21-25.
|
[5] |
何红星, 赵劲松, 唐晗, 等. 一种高性能双视场长波红外光学系统[J]. 红外技术, 2017, 39(5): 394-398. http://hwjs.nvir.cn/article/id/hwjs201705002
HE Hongxing, ZHAO Jingsong, TANG Han, et al. High performance dual fields of view LWIR optical system[J]. Infrared Technology, 2017, 39(5): 394-398. http://hwjs.nvir.cn/article/id/hwjs201705002
|
[6] |
陈建发, 潘枝峰, 王合龙, 等. 基于制冷型探测器的双波段红外光学系统无热化设计[J]. 电光与控制, 2019, 26(10): 83-86.
CHEN Jianfa, PAN Zhifeng, WANG Helong, et al. Athermalization design of a dual-band infrared optical system with cryogenic detector[J]. Electronics Optics & Control, 2019, 26(10): 83-86.
|
[7] |
单秋莎, 谢梅林, 刘朝晖, 等. 制冷型长波红外光学系统设计[J]. 中国光学, 2022, 15(1): 72-78.
SHAN Qiusha, XIE Meilin, LIU Zhaohui, et al. Design of cooled long-wavelength infrared imaging optical system[J]. Chinese Optics, 2022, 15(1): 72-78.
|
[8] |
栗洋洋, 杨加强, 彭晴晴, 等. 制冷型红外双波段广角无热化光学系统设计[J]. 激光与红外, 2023, 23(5): 712-715.
LI Yangyang, YANG Jiaqiang, PENG Qingqing, et al. Design of cooled infrared dual-band wide angle athermal optical system[J]. Laser and Infrared, 2023, 23(5): 712-715.
|
[9] |
王文生. 现代光学系统设计[M]. 北京: 国防工业出版社, 2008: 85-127.
WANG Wensheng. Modern Optical System Design[M]. Beijing: Nation Defence Industry Press, 2008: 85-127.
|
[10] |
黄颖, 雷文平, 兰丽艳, 等. 遥感卫星CCD相机光学系统的热补偿设计[J]. 航天返回与遥感, 2002, 23(4): 38-40.
HUANG Ying, LEI Wenping, LAN Liyan, et al. Optical system athermalization of remote sensing satellite CCD camera[J]. Spaecraft Remote Sensing, 2002, 23(4): 38-40.
|
[11] |
王远方舟, 白玉琢, 贾钰超, 等. 一种长波红外光学消热差系统设计[J]. 红外技术, 2012, 34(9): 531-534. http://hwjs.nvir.cn/article/id/hwjs201209009
WANG Yuanfanghzou, BAI Yuzhuo, JIA Yuchao, et al. A design of FIR athermal system[J]. Infrared Technology, 2012, 34(9): 531-534. http://hwjs.nvir.cn/article/id/hwjs201209009
|
[12] |
吴海清, 王海霞, 赵新亮, 等. 双波段/双视场红外光学系统设计[J]. 红外技术, 2010, 32(11): 640-644. DOI: 10.3969/j.issn.1001-8891.2010.11.006
WU Haiqing, WANG Haixia, ZHAO Xinliang, et al. Design of dual-band/dual-filed ir optical system[J]. Infrared Technology, 2010, 32(11): 640-644. DOI: 10.3969/j.issn.1001-8891.2010.11.006
|