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Proceedings Paper

Measurement of curvature radius using phase retrieval with volume speckle field
Author(s): Mingguang Shan; Pei Zhi; Zhi Zhong; Bo Zhu
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Paper Abstract

A laser beam with an ideal wavefront passes through a random amplitude mask to produce speckle fields. The speckle fields then illuminate the measured lens and are modulated by its shape to further scatter the speckle fields. The shape of the lens can be measured from the sequential intensity measurements of volume speckle field and phase retrieval based on angular-spectrum propagation technique. The curvature radius of the lens is directly derived from the shape function. In comparison with the existing measurement methods, the method proposed has a simple set-up, a strong environmental anti-interference capability and a low cost. Experimental results indicate that the proposed method is an effective approach which can be used for the measurement of radius at low cost.

Paper Details

Date Published: 28 December 2010
PDF: 7 pages
Proc. SPIE 7544, Sixth International Symposium on Precision Engineering Measurements and Instrumentation, 75442A (28 December 2010); doi: 10.1117/12.885426
Show Author Affiliations
Mingguang Shan, Harbin Engineering Univ. (China)
Pei Zhi, Harbin Engineering Univ. (China)
Zhi Zhong, Harbin Engineering Univ. (China)
Bo Zhu, Harbin Institute of Technology (China)

Published in SPIE Proceedings Vol. 7544:
Sixth International Symposium on Precision Engineering Measurements and Instrumentation
Jiubin Tan; Xianfang Wen, Editor(s)

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