Virtual image display device
First Claim
Patent Images
1. A head-coupled display device for use in presenting electronically generated visual images to a viewer, comprising:
- a headpiece adapted to be worn by the viewer;
an image display screen mounted in the headpiece for presenting the electronically generated images to the viewer; and
a fresnel lens mounted in the headpiece for focusing the electronically generated images from the image display screen at a selected position for viewing, wherein one side of the fresnel lens includes a grooved surface, and wherein the fresnel lens is positioned such that the grooved surface is closer to the image display screen than an opposite surface of the fresnel lens.
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Abstract
A head-coupled display device for use in presenting electronically generated visual images to a viewer. The device includes a headpiece worn by a viewer, and an image display screen mounted in the headpiece for presenting electronically generated images. A fresnel lens is positioned adjacent the screen for focusing images from the screen at a selected position for viewing as a virtual image. The lens has a set of concentric converging rings whose surface curvatures act to minimize rectilinear distortion of the virtual images perceived by the viewer over the entire field of view of the image.
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Citations
18 Claims
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1. A head-coupled display device for use in presenting electronically generated visual images to a viewer, comprising:
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a headpiece adapted to be worn by the viewer; an image display screen mounted in the headpiece for presenting the electronically generated images to the viewer; and a fresnel lens mounted in the headpiece for focusing the electronically generated images from the image display screen at a selected position for viewing, wherein one side of the fresnel lens includes a grooved surface, and wherein the fresnel lens is positioned such that the grooved surface is closer to the image display screen than an opposite surface of the fresnel lens. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An optical device for viewing electronically generated images, comprising:
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an image display screen for presenting the electronically generated images to a viewer; a fresnel lens for focusing images from the image display screen at a selected position for viewing, wherein one side of the fresnel lens includes a grooved surface, wherein the fresnel lens is positioned such that the grooved surface is closer to the image display screen than an opposite surface of the fresnel lens; and head-coupling means for supporting the image display screen and the fresnel lens at a position for viewing by the viewer. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification