Two methods for achieving subpixel resolution in phase difference determination by fringe pattern matching

Zuobin Wang; Peter John Bryanston-Cross; Duc-Truong Pham

doi:10.1117/12.281168

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17 September 1997 Two methods for achieving subpixel resolution in phase difference determination by fringe pattern matching

Zuobin Wang, Peter John Bryanston-Cross, Duc-Truong Pham

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Proceedings Volume 3098, Optical Inspection and Micromeasurements II; (1997) https://doi.org/10.1117/12.281168
Event: Lasers and Optics in Manufacturing III, 1997, Munich, Germany

Abstract

This paper presents the methods of linear interpolation and polynomial curve fitting for achieving sub-pixel resolution phase difference determination by fringe pattern matching. These two methods wee examined by computer simulation and experiment. In computer simulation, the effects of the resolutions of imaging system were also discussed. The computer simulation and experimental result have shown that the method of linear interpolation and that of polynomial curve fitting can both be used to achieve sub-pixel resolution in the measurement of phase difference by fringe pattern matching. The phase difference between fringe patterns is easy to achieve by linear interpolation compared with polynomial curve fitting.

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Zuobin Wang, Peter John Bryanston-Cross, and Duc-Truong Pham "Two methods for achieving subpixel resolution in phase difference determination by fringe pattern matching", Proc. SPIE 3098, Optical Inspection and Micromeasurements II, (17 September 1997); https://doi.org/10.1117/12.281168

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