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Image display apparatus

  • US 6,384,983 B1
  • Filed: 09/08/2000
  • Issued: 05/07/2002
  • Est. Priority Date: 11/19/1999
  • Status: Expired due to Term
First Claim
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1. An image display apparatus comprising display means for displaying image information, and optical means for guiding light from the display means to the eye, wherein said optical means comprises a prism body of a positive refractive power having three or more surfaces with refractive powers differing depending upon azimuthal angles, and wherein a surface of the prism body closest to the display means is a surface in which refractive powers thereof differ depending upon azimuthal angles and in which a local curvature radius area having a positive refractive power on a local generating-line section (meridional section) is interposed between local curvature radius areas having a negative refractive power on the local generating-line section (meridional section).

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