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Proceedings Paper

Study on phase retrieval of a single closed fringe interferogram in radial shearing interferometer for aspheric test
Author(s): Chao Tian; Yongying Yang; Yongjie Luo; Dong Liu; Yongmo Zhuo
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Paper Abstract

The radial shearing interferometer that is immune to vibration and the spatial phase modulation technique that can retrieve the phase from a single interferogram can be used for precise measurement of aspheric surfaces. However, as a carrier is needed to be introduced in the system to keep the fringes open, the spatial phase modulation technique generally leads to a great increase in the density of the fringes. A novel method that uses just one frame of the interferogram and need not introduce any spatial carrier in the interferometer is proposed in the paper. To demodulate the closed interferograms generated in the system, a regularized phase-tracking technique that can be used for a single open or closed fringe pattern is employed to recover the phase map. Actually the presented method can also be applied in many other cases, for example flow visualization. Both computer simulation and experimental result have demonstrated the validity and efficiency of the proposed method.

Paper Details

Date Published: 11 October 2010
PDF: 6 pages
Proc. SPIE 7656, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 765612 (11 October 2010); doi: 10.1117/12.867051
Show Author Affiliations
Chao Tian, Zhejiang Univ. (China)
Yongying Yang, Zhejiang Univ. (China)
Yongjie Luo, Zhejiang Univ. (China)
Dong Liu, Zhejiang Univ. (China)
Yongmo Zhuo, Zhejiang Univ. (China)


Published in SPIE Proceedings Vol. 7656:
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment

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