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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 9 — Mar. 20, 2009
  • pp: 1675–1682

Experiments of a grating light modulator for projection display applications

Zhang Jie, Zhu Yong, Sun Jiyong, Wang Ning, and Wei Wei  »View Author Affiliations


Applied Optics, Vol. 48, Issue 9, pp. 1675-1682 (2009)
http://dx.doi.org/10.1364/AO.48.001675


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Abstract

A micromechanical optical modulator called a grating light modulator (GLM) with electrostatic actuation, fabricated by the conventional process, is described. The GLM is operated by the interaction of a stationary reflector and a movable sliding grating. The GLM is a micromechanical phase grating. The phase difference is determined by the slide of the movable part (upper grating), allowing different diffraction patterns of reflected light. In addition, 100% modulation in the first/zero order can act as an optical switch and produce bright or dark pixels in a projection display system. Built using microelectromechanical system technology, and designed to be manufactured using mainstream integrated circuit fabrication technology, a 256-pixel GLM array is fabricated. We also describe projection display applications of a GLM as a high efficiency spatial light modulator. The optimized display system with a GLM is theoretically discussed in detail. The single-color and three-color experimental results indicate that the GLM technology has characteristics that make it suitable for projection display applications.

© 2009 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(050.2770) Diffraction and gratings : Gratings
(120.2040) Instrumentation, measurement, and metrology : Displays
(070.6120) Fourier optics and signal processing : Spatial light modulators

ToC Category:
Diffraction and Gratings

History
Original Manuscript: October 28, 2008
Revised Manuscript: January 27, 2009
Manuscript Accepted: February 7, 2009
Published: March 12, 2009

Citation
Zhang Jie, Zhu Yong, Sun Jiyong, Wang Ning, and Wei Wei, "Experiments of a grating light modulator for projection display applications," Appl. Opt. 48, 1675-1682 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-9-1675


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