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Stress tuned blazed grating light valve

  • US 6,639,722 B2
  • Filed: 08/15/2001
  • Issued: 10/28/2003
  • Est. Priority Date: 08/15/2001
  • Status: Expired due to Term
First Claim
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1. A light modulator comprising:

  • a. elongated element arranged parallel to each other and configured in a grating plane, each elongated element comprising a central blazed portion, a first outer blaze transition, and a second outer blaze transition, the central blaze portion coupling the first outer blaze transition to the second outer blaze transition, each central blazed port on comprising a reflective surface such that in operation an incident light illuminating the central blazed portions diffracts into at least two diffraction orders; and

    b. means for adjusting a height of selected ones of the elongated elements relative to the grating plane such that in operation the incident light diffracts into a single diffraction order different than the at least two diffraction orders.

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