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Optical Engineering

Isochromatic photoelastic phase map unwrapping: temporal versus spatial approach
Author(s): Jing-Tai Wu; Min-Jui Huang
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Paper Abstract

A comparison of temporal and spatial unwrapping on a photoelastic isochromatic phase map is discussed. The analytical results show that the two-dimensional Macy’s spatial unwrapping can yield a quite good retrieval if an inconsistency-free isochromatic map is to be treated as is true in most of the photoelastic problem cases. While only temporal wrapped data are provided for the phase retrieving work, the success strongly depends on providing the correct changing ratio between the two (or more) temporal states, (e.g., percentage variation of load or wavelength step). The simulation of an incorrect ratio of the temporal isochromatic work on the accuracy of the retrieving work is performed. Experimental results show that temporal unwrapping error is more easily occurs near a highly stressed zone.

Paper Details

Date Published: 8 May 2015
PDF: 7 pages
Opt. Eng. 54(8) 081207 doi: 10.1117/1.OE.54.8.081207
Published in: Optical Engineering Volume 54, Issue 8
Show Author Affiliations
Jing-Tai Wu, National Chung Hsing Univ. (Taiwan)
Min-Jui Huang, National Chung Hsing Univ. (Taiwan)


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