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Applied Optics

Applied Optics


  • Vol. 31, Iss. 20 — Jul. 10, 1992
  • pp: 3937–3944

Gray scale response from optically addressed spatial light modulators incorporating surface-stabilized ferroelectric liquid crystals

Bruce Landreth and Garret Moddel  »View Author Affiliations

Applied Optics, Vol. 31, Issue 20, pp. 3937-3944 (1992)

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We demonstrate the capability of optically addressed spatial light modulators that incorporate surface-stabilized ferroelectric liquid crystals to reproduce gray scale. This capability is based on temporal averaging and is observed in an operating mode in which the applied voltage repeatedly cycles the device between writing and erasing at operating frequencies between 100 and 2000 Hz. A gray scale response is observed for write-light intensities below a saturation level that increases from 100 μW/cm2 at 100 Hz to 2 mW/cm2 at 2 kHz. We develop a procedure to determine the modulation transfer function from measurements of the diffraction efficiency as a function of spatial frequency and write-light intensity in a device with a nonlinear transfer characteristic. At an operating frequency of 500 Hz, the modulation transfer function is greater than or equal to 0.50 at a spatial frequency of 40 line pairs/mm.

© 1992 Optical Society of America

Original Manuscript: March 29, 1991
Published: July 10, 1992

Bruce Landreth and Garret Moddel, "Gray scale response from optically addressed spatial light modulators incorporating surface-stabilized ferroelectric liquid crystals," Appl. Opt. 31, 3937-3944 (1992)

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