Research on nonlinear focal plane stitching method for TDICCD space camera

Hui Zhong; Xin Jia; Yue Guo; Jing Wang; Yezhi Zhang

doi:10.1117/12.2505043

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12 December 2018 Research on nonlinear focal plane stitching method for TDICCD space camera

Hui Zhong; Xin Jia; Yue Guo; Jing Wang; Yezhi Zhang

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Proceedings Volume 10846, Optical Sensing and Imaging Technologies and Applications; 108461O (2018) https://doi.org/10.1117/12.2505043
Event: International Symposium on Optoelectronic Technology and Application 2018, 2018, Beijing, China

Abstract

Due to the influence of optical distortion, TDICCD camera will have imaging blur in the process of push broom imaging. From the angle of focal plane stitching, the principle of imaging blur leaded by optical distortion is analyzed, and a compensation method of nonlinear focal plane stitching is proposed. The principle of the method and the mathematical model of optimum stitching design are introduced. Take the off-axis three-mirror optical system as an example, the focal length of the optical system is 10m, the F number is 16, the design field of view 2ω is 1.4°, and the maximum distortion in the design field is 1%.The nonlinear stitching method is designed, and the optimal stitching angle is calculated. Compared with the linear stitching method, the design result of the nonlinear stitching method can decrease the maximum fuzzy value from 0.61 pixels to 0.2 pixels, and the 𝒇_{𝑴𝑻,𝑫} from 0.858 to 0.984.This study could provide the reference for focal plane design of long focal length and wide field space camera.

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Hui Zhong, Xin Jia, Yue Guo, Jing Wang, and Yezhi Zhang "Research on nonlinear focal plane stitching method for TDICCD space camera", Proc. SPIE 10846, Optical Sensing and Imaging Technologies and Applications, 108461O (12 December 2018); https://doi.org/10.1117/12.2505043