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|Title:||Direct measurement of curvature and twist using two-channel double-aperture digital shearography|
|Authors:||Bhaduri, B. |
fast Fourier transform
|Source:||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|
|Appears in Collections:||Staff Publications|
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