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Optical modulator

  • US 4,701,021 A
  • Filed: 10/18/1984
  • Issued: 10/20/1987
  • Est. Priority Date: 10/21/1983
  • Status: Expired due to Fees
First Claim
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1. An optical modulator of a light beam comprising:

  • a plurality of cells each of which comprise;

    two transparent plates separated one from the other;

    spacing means for holding said transparent plates apart;

    capillary space between said two transparent plates;

    reservoir means located between said two transparent plates for containing at least one fluid;

    electrical field producing means for applying an electrical field between said transparent plates for controlling the displacement of the fluid contained in said reservoir means between said reservoir means and said capillary space, wherein said fluid will be located in said reservoir means in response to the presence of said electrical field;

    measuring means for measuring the intensity of a light beam and for outputting a signal indicative of the measured light;

    control means coupled to said measuring means and the electrical field producing means of each of said cells for providing control information for activation of said electrical field producing means in response to said signal indications of said measured light;

    wherein at least one of said cells is positioned in such a manner such that the capillary space is perpendicular to the direction of said light beam.

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