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Applied Optics

Applied Optics


  • Vol. 33, Iss. 14 — May. 10, 1994
  • pp: 2775–2784

256 × 256 liquid-crystal-on-silicon spatial light modulator

Douglas J. McKnight, Kristina M. Johnson, and Roylnn A. Serati  »View Author Affiliations

Applied Optics, Vol. 33, Issue 14, pp. 2775-2784 (1994)

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A 256 × 256 pixel spatial light modulator (SLM) is designed and constructed by the use of liquid-crystal-on-silicon technology. The device is a binary electrically addressed SLM with a measured zero-order contrast ratio of 70:1 and an imaged contrast ratio of 10:1. The pixel pitch is 21.6 μm, which gives an array size of 5.53 mm. The electronic load time is 43 μs, and the 10%–90% switching time of the liquid crystal is ~ 75–80 μs at room temperature, which implies a maximum frame rate of ~ 8.3 kHz. We discuss the design trade-offs that are intrinsic to this type of device and describe how the primary application for the device in an optical correlator influenced the final design.

© 1994 Optical Society of America

Original Manuscript: August 27, 1993
Revised Manuscript: December 20, 1993
Published: May 10, 1994

Douglas J. McKnight, Kristina M. Johnson, and Roylnn A. Serati, "256 × 256 liquid-crystal-on-silicon spatial light modulator," Appl. Opt. 33, 2775-2784 (1994)

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