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Proceedings Paper

Analysis on relation between Hartmann-Shack wavefront detection error and image restoration quality
Author(s): Qi Li; Zhihai Xu; Huajun Feng; Yueting Chen; Yuhua Yu
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Paper Abstract

The wavefront passed through the atmosphere will produce different degree of distortion, due to atmospheric disturbances, defocus, aberration and etc. Distortion of wavefront can result in image degradation. Conventional methods typically use adaptive optics to correct the degradation. Correction system is complex and requires three parts, including wavefront detection, wavefront reconstruction, wavefront correction, and each part requires very precise control. In order to simplify the system structure, we use Hartmann - Shack wavefront sensor to get wavefront information, and then reconstruct the degenerated image using software restoration method. The paper introduces the background and significance of Hartmann-Shack wavefront sensor, summarizes the wavefront reconstruction principle. Then we analyze the general model of optical transfer function (OTF) and the way to calculate the OTF of diffraction limited incoherent image system. Take the actual situation into consideration, wavefront distortion is unavoidable, so we deduce the method to calculate OTF with wavefront distortion. Based on different wavefront detection error and the image restoration quality, we concluded the allowed maximum detection error under different peak value of wavefront.

Paper Details

Date Published: 3 February 2014
PDF: 8 pages
Proc. SPIE 9016, Image Quality and System Performance XI, 90160T (3 February 2014); doi: 10.1117/12.2038331
Show Author Affiliations
Qi Li, Zhejiang Univ. (China)
Zhihai Xu, Zhejiang Univ. (China)
Huajun Feng, Zhejiang Univ. (China)
Yueting Chen, Zhejiang Univ. (China)
Yuhua Yu, Zhejiang Univ. (China)

Published in SPIE Proceedings Vol. 9016:
Image Quality and System Performance XI
Sophie Triantaphillidou; Mohamed-Chaker Larabi, Editor(s)

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