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Light controlling apparatus

  • US 6,456,345 B1
  • Filed: 04/29/1999
  • Issued: 09/24/2002
  • Est. Priority Date: 05/13/1998
  • Status: Expired due to Term
First Claim
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1. A light controlling apparatus comprising:

  • a liquid-crystal cell;

    a mechanical iris located on one side of said liquid crystal cell, said mechanical iris having a movable portion; and

    a polarizing plate which is movable inside/outside an optical path of light incident to said liquid crystal cell;

    wherein said polarizing plate is made movable inside/outside the optical path by providing the polarizing plate on the movable portion of said mechanical iris.

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