| Citation: | MA Hong-tao, HAN Bing, XU Hong-gang, LI Xu, ZHANG Ming-liang. Design of SWIR/MWIR catadioptric common-aperture optical system[J]. Chinese Optics. doi: 10.37188/CO.2024-0154
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In order to simulate dynamic scenes with high accuracy and high reliability, a short-wave infrared (SWIR) and mid-wave infrared (MWIR) multiband catadioptric common-aperture optical system is designed. The system combines the advantages of reflection, refraction and common-aperture optical path, and is independently designed into the main optical system, short-wave optical system and mid-wave optical system. The initial structure of the optical system is obtained according to theoretical calculation, and the optical parameters are further detailed by optical design software. Finally, according to the principle of pupil matching, the sub-systems are combined. The image quality of the system is further optimized and the rationality of the system design is verified by the simulation of modulation transfer function (MTF) and distortion. The designed short-wave optical system has a field angle of ±0.107°, a focal length of 2500mm, an entry pupil size of 300mm, MTF reaches the diffraction limit, and the distortion is less than 0.3%. The field angle of the mid-wave optical system is ±0.65°, the focal length is 750mm, the entry pupil size is 300mm, the MTF is close to the diffraction limit, and the distortion is less than 1%. The system has good image quality, small size and strong practicability, and has great application potential in the field of photoelectric tracking and space detection.
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