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Optical Engineering

Direct measurement of curvature and twist using two-channel double-aperture digital shearography
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Paper Abstract

A direct method of determining second-order derivatives of displacement (curvature and twist) using two-channel double-aperture digital shearography is presented. Spatial carrier fringes are incorporated inside the speckle using a double-aperture mask in a two-channel experimental setup. Two sets of slope phase maps are generated that are either shifted in the x direction for curvature measurement or in the y direction for twist measurement. Experimental results are presented to verify the validity of the proposed method.

Paper Details

Date Published: 1 March 2010
PDF: 6 pages
Opt. Eng. 49(3) 033604 doi: 10.1117/1.3359470
Published in: Optical Engineering Volume 49, Issue 3
Show Author Affiliations
Basanta Bhaduri, National Univ. of Singapore (Singapore)
Cho Jui Tay, National Univ. of Singapore (Singapore)
Chenggen Quan, National Univ. of Singapore (Singapore)

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