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Title: Two wavelength simultaneous DSPI and DSP for 3D displacement field measurements
Authors: Bhaduri, B. 
Tay, C.J. 
Quan, C. 
Niu, H.
Sjödahl, M.
Keywords: Digital speckle pattern interferometry (DSPI)
Digital speckle photography (DSP)
Displacement measurement
Fourier transform method (FTM)
Issue Date: 15-May-2011
Citation: Bhaduri, B., Tay, C.J., Quan, C., Niu, H., Sjödahl, M. (2011-05-15). Two wavelength simultaneous DSPI and DSP for 3D displacement field measurements. Optics Communications 284 (10-11) : 2437-2440. ScholarBank@NUS Repository.
Abstract: A novel optical system is proposed that implements digital speckle pattern interferometry (DSPI) and digital speckle photography (DSP) simultaneously using two wavelength illumination of an object for simultaneous measurement of all three components of the displacement vector field. A collimated red light illuminates both the object and a reference surface in a DSPI configuration which is sensitive to out-of-plane displacement field while a blue light illuminates the object in a DSP configuration which is sensitive to in-plane displacement fields. A color 3-CCD camera records the red and blue lights individually through its red and blue channels, respectively. Two reference images and one image in the deformed state of the object are required for quantitative measurement. Experimental results are presented to validate the system. © 2011 Elsevier B.V. All rights reserved.
Source Title: Optics Communications
ISSN: 00304018
DOI: 10.1016/j.optcom.2011.01.036
Appears in Collections:Staff Publications

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