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Optical data processing device

  • US 5,268,679 A
  • Filed: 05/31/1991
  • Issued: 12/07/1993
  • Est. Priority Date: 06/29/1990
  • Status: Expired due to Fees
First Claim
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1. An optical data processing device comprising:

  • a sequence of light modulating levels, each such level consisting of a substrate carrying a matrix of elements of controllable light transmissivity, each light transmissive element having control means associated therewith for controlling the transmissivity thereof in accordance with signals supplied to such control means;

    means for supplying input data signal to the control means of the light transmissive element in the first modulating level so as to form a pattern of transmissivities at said first level which, when a light beam is incident thereon, results in formation at that level of a two-dimensional input image representing the input data signals;

    the control means of the light transmissive elements in at least one of the modulating levels comprising switching elements for modifying the transmissivities of the associated light transmissive elements in accordance with electrical data signals supplied to such switching elements;

    control means of the light transmissive elements in at least one of the further modulating levels following the first modulating level comprising light responsive elements for modifying the transmissivities of the associated light transmissive elements in accordance with the light pattern incident on such at least one modulating level and which was formed by the immediately preceding modulating level; and

    the final modulating level comprising a display screen on which is formed, in response to a light beam incident on the first modulating level, a two-dimensional output image corresponding to said input image as modified by the pattern of light transmissivities of all of the sequence of modulating levels.

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