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Applied Optics

Applied Optics


  • Vol. 39, Iss. 28 — Oct. 1, 2000
  • pp: 5125–5130

Real-time phase-difference amplification with a liquid-crystal spatial light modulator

Kiyofumi Matsuda, Geoffrey T. Bold, Thomas H. Barnes, Tomoaki Eiju, and Colin J. R. Sheppard  »View Author Affiliations

Applied Optics, Vol. 39, Issue 28, pp. 5125-5130 (2000)

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We describe a simple system for achieving real-time phase-difference amplification of interferograms. We arrange the interferogram such that it contains high-spatial-frequency carrier fringes and project it onto the write side of an optically addressed phase-only spatial light modulator. The resultant phase pattern on the modulator is read out by two readout beams, and diffraction by the carrier fringes provides the spatial heterodyning that is necessary for achieving phase-difference amplification. We present results that demonstrate real-time phase-difference amplification by as much as a factor of 10.

© 2000 Optical Society of America

OCIS Codes
(120.2830) Instrumentation, measurement, and metrology : Height measurements
(120.2880) Instrumentation, measurement, and metrology : Holographic interferometry
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(120.5050) Instrumentation, measurement, and metrology : Phase measurement
(120.6660) Instrumentation, measurement, and metrology : Surface measurements, roughness

Original Manuscript: February 25, 2000
Revised Manuscript: June 19, 2000
Published: October 1, 2000

Kiyofumi Matsuda, Geoffrey T. Bold, Thomas H. Barnes, Tomoaki Eiju, and Colin J. R. Sheppard, "Real-time phase-difference amplification with a liquid-crystal spatial light modulator," Appl. Opt. 39, 5125-5130 (2000)

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