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Optical device, and virtual image display device

  • US 8,213,755 B2
  • Filed: 10/24/2011
  • Issued: 07/03/2012
  • 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 diffraction grating and a second diffraction grating provided on the optical waveguide,wherein,the collimating optical system receives an incident light from each pixel of the image display element and forms light groups different from each other in field angle, andthe light 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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