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Optical device

  • US 20030067685A1
  • Filed: 10/09/2001
  • Published: 04/10/2003
  • Est. Priority Date: 10/09/2001
  • Status: Active Grant
First Claim
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1. An optical device for enlarging an eye box, the optical device comprising:

  • (a) a first optical expander being carried by, or formed in, a first light-transmissive substrate engaging a first plane; and

    (b) a second optical expander being carried by, or formed in, a second light-transmissive substrate engaging a second plane being spaced apart from said first plane;

    said first and second optical expanders being designed and configured such that light passing through said first optical expander is expanded in a first dimension, enters said second light-transmissive substrate, through said second optical expander and exits from said second light-transmissive substrate expanded in a second dimension, hence enlarging an eye box of the optical device in both said first and said second dimensions.

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