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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 8, Iss. 12 — Dec. 1, 1991
  • pp: 2001–2008

Speckle-shearing interferometry using a liquid-crystal cell as a phase modulator

H. Kadono, S. Toyooka, and Y. Iwasaki  »View Author Affiliations


JOSA A, Vol. 8, Issue 12, pp. 2001-2008 (1991)
http://dx.doi.org/10.1364/JOSAA.8.002001


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Abstract

Fundamental properties of the phase-modulation ability of a nematic liquid-crystal cell are studied. Based on these phase-modulation properties of the liquid-crystal cell, a new type of speckle-shearing interferometer is proposed and studied experimentally. A liquid-crystal cell is employed as a phase shifter to implement the phase-shifting method for the conventional speckle-shearing interferometer. From the experiments used to measure the deformation of an object, the usefulness of the method is confirmed. Finally, a compensation method for phase-shift error is proposed on the basis of the statistical properties of the fully developed speckle field. In this method the speckle phase is regarded, in a statistical sense, as a standard phase object used to calibrate the measuring system. Experiments to confirm the error-compensation method are performed, and it is shown that the phase-shift error can be determined with an accuracy of as much as λ/100.

© 1991 Optical Society of America

History
Original Manuscript: November 5, 1990
Revised Manuscript: July 8, 1991
Manuscript Accepted: July 10, 1991
Published: December 1, 1991

Citation
H. Kadono, S. Toyooka, and Y. Iwasaki, "Speckle-shearing interferometry using a liquid-crystal cell as a phase modulator," J. Opt. Soc. Am. A 8, 2001-2008 (1991)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-8-12-2001

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