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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 5 — Mar. 2, 2009
  • pp: 3417–3423

Polarization-controlled contrasted images using dye-doped nematic liquid crystals

R. Porras-Aguilar, J.C. Ramirez-San-Juan, O. Baldovino-Pantaleón, D. May-Arrioja, M. L. Arroyo Carrasco, M.D. Iturbe Castillo, D. Sánchez-de-la-Llave, and R. Ramos-Garcia  »View Author Affiliations

Optics Express, Vol. 17, Issue 5, pp. 3417-3423 (2009)

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We explore the polarization dependence of the nonlinear response of a planar nematic liquid crystal cell doped with 1% wt of methyl red dye. The results obtained show that the refractive index change can be switched from a positive value to a negative one as the polarization of the beam changes from parallel to perpendicular with respect to the rubbing direction. This property is exploited in a phase contrast system, where a dynamic phase filter is photoinduced in a liquid crystal cell placed in the system’s Fourier plane. Real-time contrast inversion in the resulting images is demonstrated.

© 2009 Optical Society of America

OCIS Codes
(100.5090) Image processing : Phase-only filters
(160.3710) Materials : Liquid crystals
(230.3720) Optical devices : Liquid-crystal devices

ToC Category:
Image Processing

Original Manuscript: November 20, 2008
Revised Manuscript: January 16, 2009
Manuscript Accepted: January 19, 2009
Published: February 19, 2009

R. Porras Aguilar, J. C. Ramirez-San-Juan, O. Baldovino-Pantaleon, D. May-Arrioja, M. L. Arroyo Carrasco, M. D. Iturbe-Castillo, D. Sánchez-de-la-Llave, and R. Ramos-Garcia, "Polarization-controlled contrasted images using dye-doped nematic liquid crystals," Opt. Express 17, 3417-3423 (2009)

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