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Proceedings Paper

Wavefront subaperture stitching with Shack-Hartmann sensor
Author(s): Hongru Li; Guoying Feng; Jianfei Sun; Thomas Bourgade; Shouhuan Zhou; Anand Asundi
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Paper Abstract

A new approach for large field of view measurement using the Shack-Hartmann wavefront sensor (SHWS) is proposed. The object to be measured is divided into several subaperture units. Each unit is measured using the SHWS and a new algorithm is applied to stitch these units. Both theoretical principle and experimental verification are provided in this paper. A comparison between the present global optimization stitching scheme with the conventional sequential stitching method highlights the benefits of the new system. Experimental validation of the SHWS stitching algorithm is carried out by using a coated mirror. Comparison is made with a phase shifting interferometer and good agreement is found. Lastly, a new methodology for large aperture measurement of optical components is provided.

Paper Details

Date Published: 17 July 2015
PDF: 8 pages
Proc. SPIE 9524, International Conference on Optical and Photonic Engineering (icOPEN 2015), 95241E (17 July 2015); doi: 10.1117/12.2189452
Show Author Affiliations
Hongru Li, Sichuan Univ. (China)
Nanyang Technological Univ. (Singapore)
Guoying Feng, Sichuan Univ. (China)
Jianfei Sun, Hefei Univ. of Technology (China)
Nanyang Technological Univ. (Singapore)
Thomas Bourgade, Nanyang Technological Univ. (Singapore)
Shouhuan Zhou, Sichuan Univ. (China)
Anand Asundi, Nanyang Technological Univ. (Singapore)

Published in SPIE Proceedings Vol. 9524:
International Conference on Optical and Photonic Engineering (icOPEN 2015)
Anand K. Asundi; Yu Fu, Editor(s)

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