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An improved phase diversity wavefront sensor based on the altered exposure time of camera
Author(s): Qingfeng Kong; Shuai Wang; Ping Yang; Xin Yu; Boheng Lai; Boqing Pang; Yong Liu; Bing Xu
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Paper Abstract

Since the phase diversity (PD) wavefront sensor has the advantages of simple structure and high light energy utilization, it is one of most attractive wavefront detection tools. The accuracy of retrieval wavefront depends on the precision of the detective intensity distribution of the CCD camera. However, limited by manufacture craft, the noise data are inevitably recorded, so CCD has only good performance in fixed dynamic ranges. In this paper, we propose a simple modified phase diversity wavefront sensor based on the altered exposure time of camera to improve the dynamic ranges of CCD. The two images are taken under normal exposure time and saturated exposure time of CCD, and then they are stitched to form a perfect image including accurate high space frequency and low space frequency information. Under same signal to noise ratio a comparison between the improved phase diversity wavefront sensor and the traditional phase diversity wavefront sensor is made by using simulation. The results show that this method can significantly enhance the retrieval wavefront accuracy.

Paper Details

Date Published: 24 October 2017
PDF: 8 pages
Proc. SPIE 10462, AOPC 2017: Optical Sensing and Imaging Technology and Applications, 104622W (24 October 2017); doi: 10.1117/12.2284962
Show Author Affiliations
Qingfeng Kong, Key Lab. on Adaptive Optics (China)
Univ. of Electronic Science and Technology of China (China)
Institute of Optics and Electronics (China)
Shuai Wang, Key Lab. on Adaptive Optics (China)
Institute of Optics and Electronics (China)
Ping Yang, Key Lab. on Adaptive Optics (China)
Institute of Optics and Electronics (China)
Xin Yu, Key Lab. on Adaptive Optics (China)
Univ. of Electronic Science and Technology of China (China)
Institute of Optics and Electronics (China)
Boheng Lai, Key Lab. on Adaptive Optics (China)
Institute of Optics and Electronics (China)
Univ. of Chinese Academy of Sciences (China)
Boqing Pang, Key Lab. on Adaptive Optics (China)
Institute of Optics and Electronics (China)
Univ. of Chinese Academy of Sciences (China)
Yong Liu, Univ. of Electronic Science and Technology of China (China)
Bing Xu, Key Lab. on Adaptive Optics (China)
Institute of Optics and Electronics (China)


Published in SPIE Proceedings Vol. 10462:
AOPC 2017: Optical Sensing and Imaging Technology and Applications
Yadong Jiang; Haimei Gong; Weibiao Chen; Jin Li, Editor(s)

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