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Light modulation element and light modulation apparatus

  • US 4,842,396 A
  • Filed: 06/26/1985
  • Issued: 06/27/1989
  • Est. Priority Date: 06/29/1984
  • Status: Expired due to Term
First Claim
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1. A light modulation apparatus comprising:

  • a light modulation element having a plurality of light modulating portions, said element respectively controlling said light modulating portions in accordance with input signals to selectively direct light incident on said element in first and second directions, said light modulating portions being arranged in a predetermined direction, and a light receiving surface provided on each of said light modulating portions having a plurality of edges extending in a slanted manner with respect to said predetermined direction;

    means for irradiating said light modulation element with the incident light; and

    optical means for receiving a light directed in one of said first and said second directions by said light modulating portions to direct said directed light toward a predetermined direction, a pupil of said optical means lying outside an emergence-direction of a main portion of diffracted light generated in accordance with the shape of said light receiving surface of each of said light modulating portions when said incident light is directed in the other of said first and second directions.

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