制冷型长波红外光学系统设计

单秋莎; 谢梅林; 刘朝晖; 陈荣利; 段晶; 刘凯; 姜凯; 周亮; 闫佩佩

doi:10.37188/CO.2021-0116

Volume 15 Issue 1

Jan. 2022

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Article Contents

Chinese Optics > 2022 > 15(1): 72-78.

SHAN Qiu-sha, XIE Mei-lin, LIU Zhao-hui, CHEN Rong-li, DUAN Jing, LIU Kai, JIANG Kai, ZHOU Liang, YAN Pei-pei. Design of cooled long-wavelength infrared imaging optical system[J]. Chinese Optics, 2022, 15(1): 72-78. doi: 10.37188/CO.2021-0116

Citation:

SHAN Qiu-sha, XIE Mei-lin, LIU Zhao-hui, CHEN Rong-li, DUAN Jing, LIU Kai, JIANG Kai, ZHOU Liang, YAN Pei-pei. Design of cooled long-wavelength infrared imaging optical system[J]. Chinese Optics, 2022, 15(1): 72-78. doi: 10.37188/CO.2021-0116

Citation:

SHAN Qiu-sha, XIE Mei-lin, LIU Zhao-hui, CHEN Rong-li, DUAN Jing, LIU Kai, JIANG Kai, ZHOU Liang, YAN Pei-pei. Design of cooled long-wavelength infrared imaging optical system[J]. Chinese Optics, 2022, 15(1): 72-78. doi: 10.37188/CO.2021-0116

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Design of cooled long-wavelength infrared imaging optical system

doi: 10.37188/CO.2021-0116

SHAN Qiu-sha^{1, 2
,
,},
XIE Mei-lin¹,
LIU Zhao-hui^{1
,
,},
CHEN Rong-li¹,
DUAN Jing^{1, 2},
LIU Kai¹,
JIANG Kai¹,
ZHOU Liang¹,
YAN Pei-pei¹

1.
Xi’an Institute of Optics and Pecision Mechanics, Chinese Academy of Sciences, Xi’an 710119, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Funds: Supported by the National Natural Science Foundation of China (No. 61805275); CAS “Light of West China” Program (No. XAB2017B27)

More Information

Corresponding author: shqsh.2007@163.com; lzh@opt.ac.cn
Received Date: 29 May 2021
Rev Recd Date: 16 Jun 2021

Available Online: 17 Aug 2021

Publish Date: 19 Jan 2022

Abstract

Abstract

Aiming at 640×512 long-wavelength infrared cooled detectors, a cooled long-wavelength infrared optical system was designed to track and detect an infrared target. The optical system adopts the secondary imaging structure to ensure 100% cold-shielding efficiency, and adopts a combination of optical material Ge and ZnS to achieve aberration correction and achromatic design. By introducing the high-order aspheric surface, the high aberration of the system is well-corrected, thus the system structure is simplified. The optical system is composed of 6 lenses. The focal length is 400 mm, the working bands are 7.7~9.3 μm, the field of view is 1.37°×1.10°, and the F-number is 2. The design results show that at a spatial frequency of 33 lp/mm, the MTF of off-axis field of view is more than 0.24, which approaches the diffraction limit and has high imaging quality. In the operating temperature range of −35~+55 ℃, the focusing lens is used to ensure the imaging quality under high and low temperature environments, which can be used for infrared tracking detection over a wide range of temperatures.
- cooled,
- the secondary imaging,
- high order aspheric surface,
- focusing lens

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References(13)

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