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Helmet mounted display

  • US 5,341,242 A
  • Filed: 05/04/1992
  • Issued: 08/23/1994
  • Est. Priority Date: 09/05/1991
  • Status: Expired due to Term
First Claim
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1. Head mounted display apparatus comprising:

  • a surface mounted on an observer and having an at least partially reflecting portion in the view of the observer; and

    an optical projector for projecting an image for refection from the at least partially reflecting portion including;

    a display source whereon an image is formed; and

    an optical system for focusing the image at separate sagittal and tangential foci between the display source and the at least partially reflecting portion,wherein the at least partially reflecting portion has a substantially spherical shape, the image is reflected thereafrom at an angle to the radius thereof and the sagittal and tangential foci of the spherical surface correspond, respectively, to the sagittal and tangential foci of the image.

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