Design of a multifunction astronomical CCD camera

Dalei Yao; Desheng Wen; Jianru Xue; Zhi Chen; Yan Wen; Baotan Jiang; Jiangbo Xi

doi:10.1117/12.2197105

6 July 2015 Design of a multifunction astronomical CCD camera

Dalei Yao, Desheng Wen, Jianru Xue, Zhi Chen, Yan Wen, Baotan Jiang, Jiangbo Xi

Proceedings Volume 9631, Seventh International Conference on Digital Image Processing (ICDIP 2015); 96310X (2015) https://doi.org/10.1117/12.2197105
Event: Seventh International Conference on Digital Image Processing (ICDIP15), 2015, Los Angeles, United States

Abstract

To satisfy the requirement of the astronomical observation, a novel timing sequence of frame transfer CCD is proposed. The multiple functions such as the adjustments of work pattern, exposure time and frame frequency are achieved. There are four work patterns: normal, standby, zero exposure and test. The adjustment of exposure time can set multiple exposure time according to the astronomical observation. The fame frequency can be adjusted when dark target is imaged and the maximum exposure time cannot satisfy the requirement. On the design of the video processing, offset correction and adjustment of multiple gains are proposed. Offset correction is used for eliminating the fixed pattern noise of CCD. Three gains pattern can improve the signal to noise ratio of astronomical observation. Finally, the images in different situations are collected and the system readout noise is calculated. The calculation results show that the designs in this paper are practicable.

Citation Download Citation

Dalei Yao, Desheng Wen, Jianru Xue, Zhi Chen, Yan Wen, Baotan Jiang, and Jiangbo Xi "Design of a multifunction astronomical CCD camera", Proc. SPIE 9631, Seventh International Conference on Digital Image Processing (ICDIP 2015), 96310X (6 July 2015); https://doi.org/10.1117/12.2197105

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