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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 37, Iss. 21 — Nov. 1, 2012
  • pp: 4392–4394

Visualizing the conoscopic isochromatic interference fringes in anisotropic crystals by spinning polarizer and analyzer

Pengqian Wang  »View Author Affiliations

Optics Letters, Vol. 37, Issue 21, pp. 4392-4394 (2012)

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In conventional conoscopic interference patterns of optically anisotropic materials the isochromatic interference fringes are inherently masked by the dark isogyres. We prove that the isochromatic fringes can be directly visualized by spinning the crossed linear polarizer and analyzer, regardless of the polarization state of the incident light. This simple method completely eliminates the isogyres and reveals the whole isochromatic fringes without the need of any additional optical elements or calculations. The system works at any wavelength that the linear polarizer permits. The validity of this method is demonstrated by observing the interference patterns of an LiNbO3 electro-optic crystal under different external electric fields.

© 2012 Optical Society of America

OCIS Codes
(120.2650) Instrumentation, measurement, and metrology : Fringe analysis
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(260.1180) Physical optics : Crystal optics
(260.1440) Physical optics : Birefringence

ToC Category:
Instrumentation, Measurement, and Metrology

Original Manuscript: August 1, 2012
Revised Manuscript: September 11, 2012
Manuscript Accepted: September 18, 2012
Published: October 18, 2012

Pengqian Wang, "Visualizing the conoscopic isochromatic interference fringes in anisotropic crystals by spinning polarizer and analyzer," Opt. Lett. 37, 4392-4394 (2012)

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