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Proceedings Paper

The focal length control method for optical remote sensor
Author(s): Chao Zhang; Xiting Zhao; Wenchun Jiao; Xuemin Wei
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Paper Abstract

With the rapid development of the optical remote sensor technology, it puts forward higher requirements to the sensor’s index. For space camera with large field of view, long focal distance, the image quality and the focal length of the various parameters of the optical system puts forward higher requirements. Therefore how to meet the control index of the sensors put forward new problems for the alignment. The present reports on focal length mainly around the focal length calculation and accurate measurement, but there is no report about how to accurately control the focal length. This article proposed a method for combinatorial optimization based on the focal length and image quality evaluation, geometrical parameter error of the iterative optimization to obtain the best mirror distance compensation combination, that establish mirror-distance compensation control curve to guide the camera alignment process. The focus control precision is less than 1%, the field of view system surface shape is better than 0.08 λ.

Paper Details

Date Published: 8 October 2015
PDF: 9 pages
Proc. SPIE 9677, AOPC 2015: Optical Test, Measurement, and Equipment, 967703 (8 October 2015); doi: 10.1117/12.2196773
Show Author Affiliations
Chao Zhang, Beijing Institute of Space Mechanics and Electricity (China)
Xiting Zhao, Beijing Institute of Space Mechanics and Electricity (China)
Wenchun Jiao, Beijing Institute of Space Mechanics and Electricity (China)
Xuemin Wei, Beijing Institute of Space Mechanics and Electricity (China)


Published in SPIE Proceedings Vol. 9677:
AOPC 2015: Optical Test, Measurement, and Equipment
Sen Han; Jonathan D. Ellis; Junpeng Guo; Yongcai Guo, Editor(s)

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