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Optical device, and virtual image display device

  • US 8,073,296 B2
  • Filed: 05/06/2011
  • Issued: 12/06/2011
  • Est. Priority Date: 03/29/2004
  • Status: Active Grant
First Claim
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1. An image display device comprising:

  • a image display element,a collimating optical system,a optical waveguide, anda first reflection volume hologram grating and a second reflection volume hologram grating provided on the optical waveguide,wherein,the collimating optical system receives an incident pencil light beam from each pixel of the image display element and forms parallel pencil light beam groups different from each other in field angle, andthe parallel pencil light beam groups projected from the collimating optical system and different from each other in field angle are incident upon the optical waveguide.

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