Optical system design for wide-angle airborne mapping camera with diffractive optical element

Jian Zhang; Liangxiao Zhao; Fei An; Sanfeng Hao

doi:10.1117/12.2520554

24 January 2019 Optical system design for wide-angle airborne mapping camera with diffractive optical element

Jian Zhang, Liangxiao Zhao, Fei An, Sanfeng Hao

Proceedings Volume 11052, Third International Conference on Photonics and Optical Engineering; 110520C (2019) https://doi.org/10.1117/12.2520554
Event: The International Conference on Photonics and Optical Engineering, 2018, Xi'an, China

Abstract

With the development of the digital airborne photogrammetry technology, the more performances of the optical system for airborne mapping camera are required, such as the longer focal and the wider field of view (FOV). At the same time, the secondary spectrum correction becomes more important and difficult for the optical system design. A high performance optical system of airborne mapping camera with 200mm focus and 2ω=60° FOV is designed in this paper. The range of work wavelength is from 430nm to 885nm. A two-layer HDOE with negative dispersive characteristic is used to eliminate the secondary spectrum in the process of optical system design. The diffraction efficiency of the designed two-layer HDOE is up to 90%. From the result of design, the MTFs in whole fields are over 0.5 at 90lp/mm, which shows that the system has a great image quality. Meantime, the thermal analysis is done at the temperature range between -20°C and 40°C. As a result, MTF curves of the system at-20°C ~40°C show that a great image quality is kept, which meets the design requirements.

Citation Download Citation

Jian Zhang, Liangxiao Zhao, Fei An, and Sanfeng Hao "Optical system design for wide-angle airborne mapping camera with diffractive optical element", Proc. SPIE 11052, Third International Conference on Photonics and Optical Engineering, 110520C (24 January 2019); https://doi.org/10.1117/12.2520554

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