Light intensity reduction apparatus and method

  • US 5,671,035 A
  • Filed: 06/07/1995
  • Issued: 09/23/1997
  • Est. Priority Date: 06/07/1995
  • Status: Expired due to Term
First Claim
Patent Images

1. A device that selectively reduces the intensity of light in the field of view, comprising:

  • a power source;

    a light sensor capable of obtaining light direction and intensity data and of generating at least one light signal corresponding to the direction and light intensity of selected segments in the field of view;

    a means for digitizing the light signal;

    a light transmissive lens having a plurality of programmable shutter elements, wherein each shutter element can be independently selected and each has controllable transmission characteristics;

    user controls for setting user constants; and

    processing circuitry, connected to the power source, to the user controls, to the light sensor and to the shutter elements, which processes the digitized light signals with respect to predetermined values and the user constants, and modifies the light transmission characteristics of certain of the shutter elements if required depending on the processing results.

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