Design of LWIR athermalization optical system with large relative aperture

Jingyi Fu; Changfu Lang; Jianda Gu; Song Guan; Haibo Yang

doi:10.1117/12.3047970

13 December 2024 Design of LWIR athermalization optical system with large relative aperture

Jingyi Fu, Changfu Lang, Jianda Gu, Song Guan, Haibo Yang

Author Affiliations +

Proceedings Volume 13492, AOPC 2024: Laser Technology and Applications; 134921B (2024) https://doi.org/10.1117/12.3047970
Event: Applied Optics and Photonics China 2024 (AOPC2024), 2024, Beijing, China

Abstract

Addressing the design requirements of infrared imaging systems for high luminous flux, compact structure, and temperature insensitivity in complex environments. In this paper, a large relative aperture athermalized infrared optical system with a wavelength range of 8~12μm, an F-number of 0.8, a clear aperture of 200mm, and a field of view of 10°×5° was designed by determining the passive athermalization mode and the structure form of the transmission optical system and introducing the aspheric surface type, and the image quality analysis was carried out at different temperatures. The design results demonstrate that within the temperature range of -40°C to 60°C, the MTF at 33.3 lp/mm exceeds 0.3 for all fields of view, and the RMS radius of the point spread function remains smaller than the Airy disk radius across the entire FOV. The achieved design boasts a compact structure, exceptional imaging quality, and effective athermalization, thereby fulfilling the design specifications. This work holds significant research value for advancing the development of wide-temperature-range, large relative aperture infrared optical imaging systems.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Jingyi Fu, Changfu Lang, Jianda Gu, Song Guan, and Haibo Yang "Design of LWIR athermalization optical system with large relative aperture", Proc. SPIE 13492, AOPC 2024: Laser Technology and Applications, 134921B (13 December 2024); https://doi.org/10.1117/12.3047970

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KEYWORDS

Athermalization

Design

Infrared imaging

Infrared radiation

Long wavelength infrared

Modulation transfer functions

Imaging systems

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