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Applied Optics

Applied Optics


  • Vol. 44, Iss. 18 — Jun. 20, 2005
  • pp: 3752–3758

Control of spatial polarization by use of a liquid crystal with an optically treated alignment layer and its application to beam apodization

Keiichi Sueda, Kouji Tsubakimoto, Noriaki Miyanaga, and Masahiro Nakatsuka  »View Author Affiliations

Applied Optics, Vol. 44, Issue 18, pp. 3752-3758 (2005)

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We have investigated the alignment of a liquid crystal whose orientation is controlled by photoisomerization reaction for use in developing optical devices to improve beam quality. A glass window of a liquid-crystal cell that is coated with poly(vinyl alcohol) doped with azo dye was illuminated with a Hg lamp. We confirmed the dependence of the spatially controlled alignment direction of a liquid crystal on the irradiation time of this ultraviolet light. The new azo dye used in this study substantially reduced the illumination energy density required for aligning liquid-crystal molecules. We have demonstrated the control of polarization and successfully fabricated a serrated apodizing aperture and a soft aperture.

© 2005 Optical Society of America

OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(230.3720) Optical devices : Liquid-crystal devices

Original Manuscript: March 19, 2004
Manuscript Accepted: November 16, 2004
Published: June 20, 2005

Keiichi Sueda, Kouji Tsubakimoto, Noriaki Miyanaga, and Masahiro Nakatsuka, "Control of spatial polarization by use of a liquid crystal with an optically treated alignment layer and its application to beam apodization," Appl. Opt. 44, 3752-3758 (2005)

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