Please use this identifier to cite or link to this item:
https://doi.org/10.1117/1.3359470
Title: | Direct measurement of curvature and twist using two-channel double-aperture digital shearography |
Authors: | Bhaduri, B. Tay, C.J. Quan, C. |
Keywords: | curvature digital shearography fast Fourier transform filtering speckle twist |
Issue Date: | 2010 |
Citation: | Bhaduri, B., Tay, C.J., Quan, C. (2010). Direct measurement of curvature and twist using two-channel double-aperture digital shearography. Optical Engineering 49 (3) : -. ScholarBank@NUS Repository. 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. |
Source Title: | Optical Engineering |
URI: | http://scholarbank.nus.edu.sg/handle/10635/59961 |
ISSN: | 00913286 |
DOI: | 10.1117/1.3359470 |
Appears in Collections: | Staff Publications |
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