Simplified design and simulation analysis of wavefront coding athermal system

Haoyang Huang; Helong Wang; Jianfa Chen; Feixiang Xu; Xuesong Liu

doi:10.1117/12.2662850

12 April 2023 Simplified design and simulation analysis of wavefront coding athermal system

Haoyang Huang, Helong Wang, Jianfa Chen, Feixiang Xu, Xuesong Liu

Proceedings Volume 12565, Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022); 125652U (2023) https://doi.org/10.1117/12.2662850
Event: Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022), 2022, Shanghai, China

Abstract

Wavefront coding is a typical application technology of computational optical imaging. It can make the optical system insensitive to thermal defocusing through special encoding and computational decoding, thus realizing athermal design. Airborne application scenarios require optical systems to meet the imaging requirements of complex temperature fields while minimizing volume and weight. However, the structure of optical passive athermal scheme is usually complex. Based on this application condition, a group of airborne infrared optical systems are designed in this paper. The system does not use an additional phase plate, but allows the lens of the original system to assume both the power and the phase encoding function. At the same time, it is compared with the optical non thermal scheme, and the imaging simulation of the complex temperature gradient environment is carried out. The research shows that the modulation transfer function of the system is relatively consistent under the environment of - 40 ℃ to 60 ℃ and the large temperature difference of each lens, and the imaging quality is good.

Citation Download Citation

Haoyang Huang, Helong Wang, Jianfa Chen, Feixiang Xu, and Xuesong Liu "Simplified design and simulation analysis of wavefront coding athermal system", Proc. SPIE 12565, Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022), 125652U (12 April 2023); https://doi.org/10.1117/12.2662850

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KEYWORDS

Wavefronts

Modulation transfer functions

Imaging systems

Point spread functions

Optical design

Image restoration

Mirrors

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