Precise thermal control of CCD assembly of space optical remote sensor

Wengang Yang; Yifan Li; Tianbing He; Zhe Bai; Xianghui Zhang; Yinghao Wang; Lei Yu; Weichun Fu; Yingcai Li

doi:10.1117/12.904832

15 November 2011 Precise thermal control of CCD assembly of space optical remote sensor

Wengang Yang, Yifan Li, Tianbing He, Zhe Bai, Xianghui Zhang, Yinghao Wang, Lei Yu, Weichun Fu, Yingcai Li

Proceedings Volume 8321, Seventh International Symposium on Precision Engineering Measurements and Instrumentation; 83211V (2011) https://doi.org/10.1117/12.904832
Event: Seventh International Symposium on Precision Engineering Measurements and Instrumentation, 2011, Yunnan, China

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.

Citation Download Citation

Wengang Yang, Yifan Li, Tianbing He, Zhe Bai, Xianghui Zhang, Yinghao Wang, Lei Yu, Weichun Fu, and Yingcai Li "Precise thermal control of CCD assembly of space optical remote sensor", Proc. SPIE 8321, Seventh International Symposium on Precision Engineering Measurements and Instrumentation, 83211V (15 November 2011); https://doi.org/10.1117/12.904832

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KEYWORDS

Charge-coupled devices

Electronics

Heat flux

Thermography

Astronomical imaging

Optical fabrication

Space sensors

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