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Variable density light control apparatus

  • US 5,113,270 A
  • Filed: 10/19/1990
  • Issued: 05/12/1992
  • Est. Priority Date: 10/19/1988
  • Status: Expired due to Fees
First Claim
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1. A variable density light control apparatus, comprising first and second polarizers having at least a partial crossed relation, and wherein at least one of said polarizers comprises a variable optical polarizer, including liquid crystal having low birefringence, containment means for containing said liquid crystal, means for affecting the structural alignment of said liquid crystal, said liquid crystal being responsive to a prescribed input to change such structural alignment, and means in said liquid crystal responsive to such structural alignment thereof for affecting polarization of light as a function of such alignment.

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