Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.optlastec.2005.12.002
Title: Surface profiling using fringe projection technique based on Lau effect
Authors: Thakur, M. 
Quan, C. 
Tay, C.J. 
Keywords: Grating
Lau effect
Surface profiling
Issue Date: Apr-2007
Source: Thakur, M., Quan, C., Tay, C.J. (2007-04). Surface profiling using fringe projection technique based on Lau effect. Optics and Laser Technology 39 (3) : 453-459. ScholarBank@NUS Repository. https://doi.org/10.1016/j.optlastec.2005.12.002
Abstract: In this paper, the surface profile of objects is determined by using a grating projection system. The method is based on the concept of self-imaging, namely, the Lau effect. Periodic fringe patterns are generated from the projection of a grating illuminated by multiple mutually incoherent quasi-plane wavefront. The fringe patterns are then projected on to the object surface and the deformed grating image is captured by a CCD camera for subsequent analysis. Phase shifting techniques have been employed to determine the phase value. With suitable calibration of the system and the phase value obtained, the surface profile of the objects can be determined. The phase variation is achieved by using a linear translation stage incorporated to the grating. In this study, two specimens are tested to demonstrate the validity of the method. One is a spherical cap with a height of 4 mm, and the other is a coin. The experimental results are compared with results obtained by mechanical stylus method. In the case of the spherical cap the results are also compared with fringe projection method based on Talbot effect. © 2006 Elsevier Ltd. All rights reserved.
Source Title: Optics and Laser Technology
URI: http://scholarbank.nus.edu.sg/handle/10635/61439
ISSN: 00303992
DOI: 10.1016/j.optlastec.2005.12.002
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

14
checked on Dec 14, 2017

WEB OF SCIENCETM
Citations

10
checked on Nov 18, 2017

Page view(s)

36
checked on Dec 10, 2017

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.