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Hologram reconstructing apparatus

  • US 5,986,780 A
  • Filed: 02/10/1997
  • Issued: 11/16/1999
  • Est. Priority Date: 09/01/1993
  • Status: Expired due to Fees
First Claim
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1. A hologram reconstructing apparatus comprising:

  • a spatial light modulator for changing a light transmission or reflection area thereof so as to display fringe patterns on a single same area whenever the apparatus reconstructs images, said light modulator being controlled in accordance with an input signal;

    drive means for driving said spatial light modulator by supplying the input signal to the spatial light modulator, wherein said drive means changes said fringe patterns displayed, and said drive means selectively changes over a plurality of different interference fringes to be displayed on a position of the same single area of said spatial light modulator; and

    illuminating means for illuminating each of said fringe patterns on the same single area of said spatial light modulator with a beam of light corresponding to each of said fringe patterns wherein each of the plurality of beams of light illuminates each of said fringe patterns with a mutually different illumination condition, so that hologram images based on each of said plurality of beams are reconstructed in a reconstructing area,wherein said drive means selects only one pattern of interference fringe to be displayed on said spatial light modulator at a time with respect to said illumination condition and displays the selected pattern of interference fringes on said spatial light modulator.

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