19 February 2015 Optical system design for wide-angle airborne mapping camera with diffractive optical element
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Proceedings Volume 9449, The International Conference on Photonics and Optical Engineering (icPOE 2014); 94492N (2015) https://doi.org/10.1117/12.2085042
Event: The International Conference on Photonics and Optical Engineering and the Annual West China Photonics Conference (icPOE 2014), 2014, Xi'an, China
Abstract
With the development of the digital airborne photo-grammetry technology, the more performances of the optical system for airborne mapping camera are required, such as the longer focal, 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 and2ω=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, and the MTF curves of the system at-20°C ~40°C show that a great image quality is kept, which meets the design requirements.
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Hai-Jun Niu, Hai-Jun Niu, Jian Zhang, Jian Zhang, A-qi Yan, A-qi Yan, Han-bing Leng, Han-bing Leng, Jia-qi Fei, Jia-qi Fei, Deng-shan Wu, Deng-shan Wu, Jian-zhong Cao, Jian-zhong Cao, } "Optical system design for wide-angle airborne mapping camera with diffractive optical element", Proc. SPIE 9449, The International Conference on Photonics and Optical Engineering (icPOE 2014), 94492N (19 February 2015); doi: 10.1117/12.2085042; https://doi.org/10.1117/12.2085042
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