Abstract
In recent years phase-measuring techniques have been applied to the
problem of extracting information of photoelastic data. We present a new
phase-measuring algorithm for extraction of the isochromatics of photoelastic
fringe patterns. The algorithm permits the extraction of the isochromatic
phase with almost no influence from the isoclinics, thus avoiding the usual
problems of low-modulation areas associated with isoclinics. The isochromatic
phase map obtained with this algorithm is well suited for a full separation of
the stress components in a sample. The algorithm can be used with any
commercial diffuse-light circular polariscope.
© 1997 Optical Society of America
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