Please use this identifier to cite or link to this item: https://doi.org/10.1117/12.621465
Title: Surface contour measurement by grating projection method based on Talbot effect
Authors: Thakur, M. 
Quan, C. 
Tay, C.J. 
Keywords: Grating
Phase shifting
Surface contour
Talbot-effect
Issue Date: 2005
Source: Thakur, M., Quan, C., Tay, C.J. (2005). Surface contour measurement by grating projection method based on Talbot effect. Proceedings of SPIE - The International Society for Optical Engineering 5852 PART I : 157-161. ScholarBank@NUS Repository. https://doi.org/10.1117/12.621465
Abstract: Motivated by the Talbot-effect, a grating projection system was designed. Periodic patterns were produced from the projection of a grating illuminated by collimated laser beam. The self- image of the grating is projected on object surface and the deformed grating image is captured by a CCD Camera for subsequent analysis. The phase variation is achieved by using a linear translation stage incorporated to the grating. In this application, a coin with an uneven surface of less than 0.2 mm is tested to demonstrate the validity of the method. The experimental results are compared with test results using mechanical stylus method.
Source Title: Proceedings of SPIE - The International Society for Optical Engineering
URI: http://scholarbank.nus.edu.sg/handle/10635/73899
ISSN: 0277786X
DOI: 10.1117/12.621465
Appears in Collections:Staff Publications

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