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Imaging apparatus having electrooptic devices which comprise a variable focal length lens

  • US 5,071,229 A
  • Filed: 08/07/1989
  • Issued: 12/10/1991
  • Est. Priority Date: 08/08/1988
  • Status: Expired due to Term
First Claim
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1. An imaging apparatus having electrooptic devices, comprising:

  • a variable focal length lens including;

    a liquid crystal lens; and

    a first polarizing plate arranged on one side of said liquid crystal lens;

    light blocking means including;

    a light blocking plate having an aperture;

    a second polarizing plate disposed on the opposite side of said liquid crystal lens and in a portion excluding a central area smaller in diameter than said aperture of said light blocking plate, said second polarizing plate having a plane of polarization oriented in a different direction from that of said first polarizing plate; and

    optically active means disposed between said first and second polarizing plates;

    first power source means for actuating said liquid crystal lens; and

    second power source means for synchronously actuating said optically active means with said first power source means.

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