Co-phasing measurement for segmented mirrors and image retrieval technology based on phase diversity

Qun Luo; Yu Ning; Lin-hai Huang; Nai-ting Gu; Chang-Hui Rao

doi:10.1117/12.975815

15 October 2012 Co-phasing measurement for segmented mirrors and image retrieval technology based on phase diversity

Qun Luo, Yu Ning, Lin-hai Huang, Nai-ting Gu, Chang-Hui Rao

Proceedings Volume 8417, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment; 84171Y (2012) https://doi.org/10.1117/12.975815
Event: 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies (AOMATT 2012), 2012, Xiamen, China

Abstract

In order to improve the imaging resolution of a segmented telescope, the co-phasing error of segmented mirrors must be accurately measured and corrected. Phase Diversity (PD) refers to a technique of image-based wavefront sensing, and it could estimate both the unknown phase parameters and the unknown object. In this paper, the Phase diversity is proposed to measure the co-phasing errors and retrieve the unknown object for segmented mirrors, and the performance of this technique is simulated for point source and extended source. The simulation results demonstrate that the Phase Diversity Wavefront Sensor (PD WFS) can synchronously measure the piston errors of multi-segmented mirrors and the quality of the retrieved image is much better than before. The Phase Diversity Wavefront Sensor can be used to measure the co-phasing errors and retrieve the unknown object for the segmented mirror system.

Citation Download Citation

Qun Luo, Yu Ning, Lin-hai Huang, Nai-ting Gu, and Chang-Hui Rao "Co-phasing measurement for segmented mirrors and image retrieval technology based on phase diversity", Proc. SPIE 8417, 6th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 84171Y (15 October 2012); https://doi.org/10.1117/12.975815

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