Wide-field head-up display (HUD) eyeglasses
First Claim
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1. A HUD eyeglass system, for one eye or for each of both eyes, wherein said HUD eyeglass system is comprised of:
- for each eye, an image projector with great depth of field and a very small (e.g. millimeter-sized) exit pupil,for each eye, an ocular relay lens or mirror having two conjugate foci such that, when the exit pupil of the projector is located at one focus and the other focus lies at or slightly anterior to the center of rotation of the eye, light is redirected from one focus toward the other so that some of it will always enter the pupil regardless of which way the eye is turned. In addition, the ocular relay also allows some light from the external scene to pass through it with little or no distortion and enter the eye.an eyeglass frame with lenses, said lenses of the eyeglasses being adjacent to, or identical with, the ocular relays. Since the low numerical aperture projector beam does not require corrective optics the design is compatible with prescription eyeglasses.
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Abstract
The present invention introduces a compact, HUD eyeglass display system of novel design that makes it possible to superimpose a wide-angle, computer-generated view on the real-world view, without obscuring the wearer'"'"'s vision or requiring any additional optical element such as beam-splitters or contact lenses. The digital display is visible regardless of which way the wearer turns his eyes, and has great depth of field, so both it and the external scene appear in focus, regardless of the distance to the scene. These head-up display eyeglasses are compatible with prescription lenses.
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Citations
13 Claims
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1. A HUD eyeglass system, for one eye or for each of both eyes, wherein said HUD eyeglass system is comprised of:
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for each eye, an image projector with great depth of field and a very small (e.g. millimeter-sized) exit pupil, for each eye, an ocular relay lens or mirror having two conjugate foci such that, when the exit pupil of the projector is located at one focus and the other focus lies at or slightly anterior to the center of rotation of the eye, light is redirected from one focus toward the other so that some of it will always enter the pupil regardless of which way the eye is turned. In addition, the ocular relay also allows some light from the external scene to pass through it with little or no distortion and enter the eye. an eyeglass frame with lenses, said lenses of the eyeglasses being adjacent to, or identical with, the ocular relays. Since the low numerical aperture projector beam does not require corrective optics the design is compatible with prescription eyeglasses. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A HUD eyeglass system, for one eye or for each of both eyes, comprising an image projector with a very small (i.e. millimeter-sized) exit pupil that can be redirected by the wearer to project outwards (e.g. onto a wall or screen) so the wearer can share an image with someone else.
- 12. A HUD eyeglass system comprising one or more digital display projectors and one or more ocular relays where intrinsic image distortions due to non-uniform magnification in the ocular relays are corrected by digitally pre-processing the signals to the projectors, introducing opposite and canceling distortions.
Specification