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Proceedings Paper

The cooling control system for focal plane assembly of astronomical satellite camera based on TEC
Author(s): Yuqing He; Yunfei Du; Wei Gao; Baopeng Li; Xuewu Fan; Wengang Yang
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Paper Abstract

The dark current noise existing in the CCD of the astronomical observation camera has a serious influence on its working performance, reducing the working temperature of CCD can suppress the influence of dark current effectively. By analyzing the relationship between the CCD chip and the dark current noise, the optimum working temperature of the red band CCD focal plane is identified as -75℃. According to the refrigeration temperature, a cooling control system for focal plane based on a thermoelectric cooler (TEC) was designed. It is required that the system can achieve high precision temperature control for the target. In the cooling control system, the 80C32 microcontroller was used as its systematic core processor. The advanced PID control algorithm is adopted to control the temperature of the top end of TEC. The bottom end of the TEC setting a constant value according to the target temperature used to assist the upper TEC to control the temperature. The experimental results show that the cooling system satisfies the requirements of the focal plane for the astronomical observation camera, it can reach the working temperature of -75℃ and the accuracy of ±2℃.

Paper Details

Date Published: 28 February 2017
PDF: 7 pages
Proc. SPIE 10256, Second International Conference on Photonics and Optical Engineering, 102562H (28 February 2017); doi: 10.1117/12.2257422
Show Author Affiliations
Yuqing He, Xi'an Institute of Optics and Precision Mechanics (China)
Univ. of Chinese Academy of Sciences (China)
Yunfei Du, Xi'an Institute of Optics and Precision Mechanics (China)
Wei Gao, Xi'an Institute of Optics and Precision Mechanics (China)
Baopeng Li, Xi'an Institute of Optics and Precision Mechanics (China)
Xuewu Fan, Xi'an Institute of Optics and Precision Mechanics (China)
Wengang Yang, Xi'an Institute of Optics and Precision Mechanics (China)


Published in SPIE Proceedings Vol. 10256:
Second International Conference on Photonics and Optical Engineering
Chunmin Zhang; Anand Asundi, Editor(s)

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