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Substrate-guided optical device with wide aperture

  • US 7,643,214 B2
  • Filed: 06/16/2005
  • Issued: 01/05/2010
  • Est. Priority Date: 06/17/2004
  • Status: Active Grant
First Claim
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1. An optical device, comprising:

  • a light-transmitting substrate having at least two major surfaces parallel to each other and edges;

    optical means for coupling light into said substrate, andat least one selectively reflecting surface located in said substrate which is non-parallel to said major surfaces of the substrate and wherein said optical means for coupling light into said substrate is a partially reflecting surface, wherein part of the light coupled into the substrate passes through the partially reflecting surface out of said substrate and part of said light is reflected into the substrate by one of the major surfaces and further reflected at least once by total internal reflection and coupled out of the substrate by the selectively reflecting surface after reflection off at least one of the major surfaces of the substrate.

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