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Applied Optics

Applied Optics


  • Vol. 38, Iss. 28 — Oct. 1, 1999
  • pp: 5931–5935

Phase-shifting method with a normal polariscope

Anand Asundi, Liu Tong, and Chai Gin Boay  »View Author Affiliations

Applied Optics, Vol. 38, Issue 28, pp. 5931-5935 (1999)

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In many laboratories of universities and industrial organizations, commercial polariscopes have the feature that the relative position of the two quarter-wave plates is fixed. This is due to the requirement of transforming a plane polariscope to a circular polariscope with greater precision and ease. Unfortunately, these polariscopes cannot implement Patterson and Wang’s [Strain 27, 49–56 (1991)] phase-shifting algorithm because this algorithm requires that the second quarter-wave plate and the analyzer of the circular polariscope be capable of independent rotation. A new phase-shifting method that can be applied under these constraints is proposed. A comparative study with Patterson and Wang’s [Strain 27, 49–56 (1991)] algorithm shows very good agreement. Furthermore, it is shown that four phase steps are sufficient to determine both the isoclinic and the isochromatic parameters.

© 1999 Optical Society of America

OCIS Codes
(050.5080) Diffraction and gratings : Phase shift
(100.5010) Image processing : Pattern recognition
(110.2960) Imaging systems : Image analysis
(120.2650) Instrumentation, measurement, and metrology : Fringe analysis

Original Manuscript: April 5, 1999
Revised Manuscript: June 15, 1999
Published: October 1, 1999

Anand Asundi, Liu Tong, and Chai Gin Boay, "Phase-shifting method with a normal polariscope," Appl. Opt. 38, 5931-5935 (1999)

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