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Proceedings Paper

Precise thermal control of CCD assembly of space optical remote sensor
Author(s): Wengang Yang; Yifan Li; Tianbing He; Zhe Bai; Xianghui Zhang; Yinghao Wang; Lei Yu; Weichun Fu; Yingcai Li
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Paper Abstract

One of the most significant requirements driving CCD assemblies design is the operating temperature. In order to avoid unaccepted dark current, CCD need operate between 7°C and 15°C and temperature gradient across the focal plane should be not greater than 1.0°C. These requirements must be achieved by combining active and passive measures. This paper focuses on the precise thermal control design, analysis and test. Because CCD assemblies include focal electronics and movable precise focalizing parts, thermal control must utilize the integrated method to achieve compatible design. Largely using standard and well-proven technologies, this paper also points out some special techniques used. Based on finite difference method and transient energy equations, thermal model of CCD assemblies were built utilizing thermal software and solved for extreme cases. To validate the design, thermal balance test has been done. Analysis and test results have shown that CCD temperature can be controlled between 7.2°C and 13.5°C and temperature gradient was less than 0.5°C. These jobs could give some guidance and reference for the precise thermal control of CCD assembly of other space optical remote-sensor.

Paper Details

Date Published: 15 November 2011
PDF: 6 pages
Proc. SPIE 8321, Seventh International Symposium on Precision Engineering Measurements and Instrumentation, 83211V (15 November 2011); doi: 10.1117/12.904832
Show Author Affiliations
Wengang Yang, Xi’an Institute of Optics and Precision Mechanics (China)
Yifan Li, The No.5 Academy of Aerospace Science and Technology Group of China (China)
Tianbing He, Xi’an Institute of Optics and Precision Mechanics (China)
Zhe Bai, Xi’an Institute of Optics and Precision Mechanics (China)
Xianghui Zhang, Xi’an Institute of Optics and Precision Mechanics (China)
Yinghao Wang, Xi’an Institute of Optics and Precision Mechanics (China)
Lei Yu, The No. 5 Academy of Aerospace Science and Technology Group of China (China)
Weichun Fu, The No. 5 Academy of Aerospace Science and Technology Group of China (China)
Yingcai Li, Xi’an Institute of Optics and Precision Mechanics (China)


Published in SPIE Proceedings Vol. 8321:
Seventh International Symposium on Precision Engineering Measurements and Instrumentation
Kuang-Chao Fan; Man Song; Rong-Sheng Lu, Editor(s)

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