OPTICAL DEVICE, AND VIRTUAL IMAGE DISPLAY DEVICE
First Claim
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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Abstract
A virtual image display device with an optical waveguide to guide, by internal total reflection, parallel pencil groups meeting a condition of internal total reflection, a first reflection volume hologram grating to diffract and reflect the parallel pencil groups incident upon the optical waveguide from outside and traveling in different directions as they are so as to meet the condition of internal total reflection inside the optical waveguide and a second reflection volume hologram grating to project the parallel pencil groups guided by internal total reflection inside the optical waveguide as they are from the optical waveguide by diffraction and reflection thereof so as to depart from the condition of internal total reflection inside the optical waveguide.
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Citations
8 Claims
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1. An image display device comprising:
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a image display element, a collimating optical system, a optical waveguide, and a 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, and the light groups projected from the collimating optical system and different from each other in field angle are incident upon the optical waveguide. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A head mounted display system comprising:
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a image display element, a collimating optical system, a optical waveguide, and a 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, and the 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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Specification