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Headwear-mounted periscopic display device

  • US 4,753,514 A
  • Filed: 05/12/1986
  • Issued: 06/28/1988
  • Est. Priority Date: 05/12/1986
  • Status: Expired due to Term
First Claim
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1. A periscopic display device for close-up viewing of a display, said device comprising:

  • means for generating a display;

    unitary periscopic means for viewing a virtual image of the display, said periscopic means comprising a body of optically clear material having a reflecting prism portion and a collimating lens portion, said prism portion including a first planar surface positioned parallel and adjacent to said display and a pair of optically aligned reflecting surfaces for transmitting a reflected image of said display, said first reflecting surface being disposed at an angle of about 45°

    with respect to said first planar surface and said second reflecting surface being disposed at an angle of from about 103°

    to about 107°

    with respect to said first reflecting surface, said collimating lens portion comprising a convex lens having a focal point at said display and positioned to receive said reflected image for focusing said image at optical infinity;

    said display generating means being mounted on said first planar surface; and

    means for mounting said composite periscopic means and display generating means on headwear for positioning said collimating lens portion within the viewing field of the user.

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