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Applied Optics

Applied Optics


  • Vol. 42, Iss. 11 — Apr. 10, 2003
  • pp: 1973–1980

Complex encoding of rotation-invariant filters onto a single phase-only spatial light modulator

Oscar Gualdrón, Jeffrey Davis, Josep Nicolás, Juan Campos, and Maria J. Yzuel  »View Author Affiliations

Applied Optics, Vol. 42, Issue 11, pp. 1973-1980 (2003)

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The accuracy and flexibility of the technique proposed by Davis et al. [Appl. Opt. 35, 2488 (1996)] for the encoding of the amplitude and the phase of a filter onto a single liquid-crystal spatial light modulator operating in a phase-only regime has been exploited to implement several filter designs in a convergent optical correlator. We have selected some filters, that given their mathematical structure showing some degree of rotational invariance, or having a parameter to regulate their behavior, require a more precise encoding. We present correlation results of outstanding quality for various rotationally invariant filter designs that have never been previously implemented with a real-time optical correlator.

© 2003 Optical Society of America

OCIS Codes
(100.4550) Image processing : Correlators
(100.5010) Image processing : Pattern recognition
(100.5760) Image processing : Rotation-invariant pattern recognition
(230.6120) Optical devices : Spatial light modulators

Original Manuscript: August 15, 2002
Revised Manuscript: December 30, 2002
Published: April 10, 2003

Oscar Gualdrón, Jeffrey Davis, Josep Nicolás, Juan Campos, and Maria J. Yzuel, "Complex encoding of rotation-invariant filters onto a single phase-only spatial light modulator," Appl. Opt. 42, 1973-1980 (2003)

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