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

Basanta Bhaduri; Cho Jui Tay; Chenggen Quan

doi:10.1117/1.3359470

1 March 2010 Direct measurement of curvature and twist using two-channel double-aperture digital shearography

Basanta Bhaduri, Cho Jui Tay, Chenggen Quan

Author Affiliations +

Optical Engineering, Vol. 49, Issue 3, 033604 (March 2010). https://doi.org/10.1117/1.3359470

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.

©(2010) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Basanta Bhaduri, Cho Jui Tay, and Chenggen Quan "Direct measurement of curvature and twist using two-channel double-aperture digital shearography," Optical Engineering 49(3), 033604 (1 March 2010). https://doi.org/10.1117/1.3359470

Published: 1 March 2010

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