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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 45, Iss. 31 — Nov. 1, 2006
  • pp: 8044–8051

Low-loss birefringent spectral filters comprising three identical retarders

Chun Ye  »View Author Affiliations


Applied Optics, Vol. 45, Issue 31, pp. 8044-8051 (2006)
http://dx.doi.org/10.1364/AO.45.008044


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Abstract

Basic fan or folded arrangements comprising three identical retarders in cascade between parallel or crossed polarizers are presented for constructing birefringent spectral filters without an internal polarizer. The retarders' axes are oriented with an angle increment of θ or θ preferably with | θ | 34.27 ° such that their orientation angles are, respectively, equal to 45 ° θ , 45°, and 45 ° + θ for the fan arrangement, or 45 ° + θ , 45 ° + 2 θ , and 45 ° + θ for the folded arrangement. A filter in the fan or folded arrangement has the bandwidth of its principal transmission peaks or the amplitude of the sidelobes adjustable by changing the angle increment | θ | . For | θ | = 25.91 ° , the filter exactly produces the transmission spectrum of a standard Lyot two-stage filter. Further, the filter can have the spectral transmission be electrically tunable or switchable, depending on the retarders selected for use. The retarders can be birefringent plates, liquid-crystal variable retarders, or liquid-crystal electrically rotatable retarders. Test measurements and results are presented and discussed.

© 2006 Optical Society of America

OCIS Codes
(120.2440) Instrumentation, measurement, and metrology : Filters
(230.3720) Optical devices : Liquid-crystal devices
(350.2460) Other areas of optics : Filters, interference

History
Original Manuscript: February 17, 2006
Revised Manuscript: May 30, 2006
Manuscript Accepted: May 31, 2006

Citation
Chun Ye, "Low-loss birefringent spectral filters comprising three identical retarders," Appl. Opt. 45, 8044-8051 (2006)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-45-31-8044

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