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Optics Letters

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  • Vol. 25, Iss. 16 — Aug. 15, 2000
  • pp: 1171–1173

Phase-shift error as a result of molecular alignment distortions in a liquid-crystal point-diffraction interferometer

Mark J. Guardalben and Nieraj Jain  »View Author Affiliations


Optics Letters, Vol. 25, Issue 16, pp. 1171-1173 (2000)
http://dx.doi.org/10.1364/OL.25.001171


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Abstract

We report the observation of nematic director distortions around the diffracting element of a liquid-crystal point-diffraction interferometer. The observed director field distortions are similar to those reported in the literature for other liquid-crystal guest–host systems. We show how the alignment distortion changes as a function of the voltage applied to the liquid-crystal cell, leading to an observed phase-shift error. Tailoring of surface anchoring conditions and judicious choice of phase-shift algorithm can improve device accuracy.

© 2000 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(160.1190) Materials : Anisotropic optical materials
(160.3710) Materials : Liquid crystals
(220.4840) Optical design and fabrication : Testing
(230.3720) Optical devices : Liquid-crystal devices

Citation
Mark J. Guardalben and Nieraj Jain, "Phase-shift error as a result of molecular alignment distortions in a liquid-crystal point-diffraction interferometer," Opt. Lett. 25, 1171-1173 (2000)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-25-16-1171


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