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Proceedings Paper

3-D surface profilometry using optic fiber phase-shifting DMDP method
Author(s): Hua Fan; Hong Zhao; Wenyi Cheng; Feng Tian; Yushan Tan
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Paper Abstract

In this paper, we introduce a novel profilometry based on computer aided image process technique which combines single mode optic fiber phase shifting interferometer as the illumination part of the configuration. The design of the optic fiber interferometer has the follow features: easily adjustable fringe space and rotation, automatic phase shifting. Besides these, it has a number of important advantages over the more conventional methods for producing projection fringes, such as extremely small size and weight, high visible fringes with little noise and absolute sinusoidal intensity distribution etc. These are very important and necessary to dual-measurement with different precision (DMDP) method for automatic phase unwrapping. Fringes generated by the interferometer are analyzed, and the relationship between the fringe phase and height distribution of an illuminated diffused surface is derived. The dual-measurement with different precision automatic phase unwrapping method is described. An example of the profilometry in operation is given.

Paper Details

Date Published: 20 March 1997
PDF: 6 pages
Proc. SPIE 2921, International Conference on Experimental Mechanics: Advances and Applications, (20 March 1997); doi: 10.1117/12.269818
Show Author Affiliations
Hua Fan, Xi'an Jiaotong Univ. (China)
Hong Zhao, Xi'an Jiaotong Univ. (China)
Wenyi Cheng, Xi'an Jiaotong Univ. (China)
Feng Tian, Xi'an Jiaotong Univ. (China)
Yushan Tan, Xi'an Jiaotong Univ. (China)


Published in SPIE Proceedings Vol. 2921:
International Conference on Experimental Mechanics: Advances and Applications

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