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Spatial light modulator based phase contrast image projection system

  • US 5,508,841 A
  • Filed: 01/09/1995
  • Issued: 04/16/1996
  • Est. Priority Date: 09/15/1993
  • Status: Expired due to Term
First Claim
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1. A method of amplitude modulation of visible and non-visible light comprising:

  • providing a coherent incident beam of light having a selected frequency;

    deflecting at least one selected element of an array of deflectable micro-mirror elements;

    reflecting said incident beam of light from said deflected micro-mirror element to form a reflected beam of light, wherein the path of said reflected light is lengthened by said deflecting step, thereby altering the phase of said reflected light;

    focusing said reflected beam to separate the zeroth-order components from the other components; and

    altering the relative phase of said reflected beam to cause interference between said zeroth-order component and said other components.

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