Head-up display device with curved optical surface having total reflection
First Claim
Patent Images
1. An optical apparatus comprising:
- means for forming an image to be observed; and
an ocular optical system for leading said image to an observer'"'"'s eyeball,said ocular optical system including, in order from said image side, a third surface which forms an entrance surface, a first surface which forms both a reflecting surface and an exit surface, and a second surface which forms a reflecting surface, said first to third surfaces being integrally formed with a medium disposed therebetween,wherein said means for forming an image is an image display device for forming an image for observation,said device being disposed at a position facing said third surface,said optical apparatus further comprising means for fitting both said device and said ocular optical system to an observer'"'"'s head,wherein at least said first surface in said ocular optical system is formed from a rotationally asymmetric curved surface so as to correct aberrations produced by a decentered surface having an optical action.
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Abstract
A display device for displaying information is provided with an optical system for guiding the light of the display device to the eye, the optical system having, in the order in the proceeding direction of the light, an entrance face for receiving the light, a curved face for totally reflecting the light and a reflecting face concave to the eye side and adapted to reflect the light toward the eye. The reflected light is transmitted by the curved face and reaches the eye. Thus there is obtained a compact display device with satisfactorily suppressed aberrations.
130 Citations
53 Claims
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1. An optical apparatus comprising:
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means for forming an image to be observed; and an ocular optical system for leading said image to an observer'"'"'s eyeball, said ocular optical system including, in order from said image side, a third surface which forms an entrance surface, a first surface which forms both a reflecting surface and an exit surface, and a second surface which forms a reflecting surface, said first to third surfaces being integrally formed with a medium disposed therebetween, wherein said means for forming an image is an image display device for forming an image for observation, said device being disposed at a position facing said third surface, said optical apparatus further comprising means for fitting both said device and said ocular optical system to an observer'"'"'s head, wherein at least said first surface in said ocular optical system is formed from a rotationally asymmetric curved surface so as to correct aberrations produced by a decentered surface having an optical action. - View Dependent Claims (2, 3, 4, 5, 6, 27)
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7. An optical apparatus comprising:
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a device for displaying an image; and an ocular optical system for projecting an image formed by said device and for leading the image to an observer'"'"'s eyeball, said ocular optical system comprising at least first, second and third surfaces, in which a space defined by said surfaces is filled with a medium, said device being disposed at a position facing said third surface, said at least first, second and third surfaces including, in order from the observer'"'"'s eyeball side toward said device, said first surface which serves as both a refracting surface and an internally reflecting surface, said second surface which serves as a reflecting surface of positive power and which faces said first surface and is decentered or tilted with respect to an observer'"'"'s visual axis, and said third surface which serves as a refracting surface closest to said device, wherein at least said first surface in said ocular optical system is formed from a rotationally asymmetric curved surface so as to correct aberrations produced by a decentered surface having an optical action. - View Dependent Claims (8, 9, 10, 11, 12, 22, 23, 24, 26, 28, 29, 30, 33, 34, 35, 37)
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13. An optical apparatus comprising:
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an image display device; and an ocular optical system for projecting an image formed by said image display device and for leading the image to an observer'"'"'s eyeball, said ocular optical system including a decentered optical element comprising at least first, second, and third surfaces, in which a space defined by said surfaces is filled with a medium, said surfaces including, from said observer'"'"'s eyeball side toward said image display device, said first surface serving as both a refracting surface and a totally reflecting surface, said second surface serving as a reflecting surface of positive power which faces said first surface and is decentered or tilted with respect to an observer'"'"'s visual axis, and said third surface serving as a refracting surface closest to said image display device, said image display device being disposed at a position facing said third surface, said ocular optical system further including at least one optical surface having refracting action, said decentered optical element and said at least one optical surface being disposed in an optical path which extends from said image display device to said observer'"'"'s eyeball, wherein at least said first surface in said ocular optical system is formed from a rotationally asymmetric curved surface so as to correct aberrations produced by a decentered surface having an optical action. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 25, 31, 32, 36)
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38. An optical apparatus comprising:
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an image-forming member that forms an image to be observed, and an ocular optical system provided to lead said image to an eyeball of an observer, wherein said ocular optical system includes, in order from an image side thereof, a third surface that forms an entrance surface, a first surface that forms both a reflecting surface and an exit surface, and a second surface that forms a reflecting surface, said first, second and third surfaces being integrally formed to face each other across a medium, and wherein at least one of said first, second and third surfaces is formed from a rotationally asymmetric curved surface that corrects aberration produced by a decentered surface. - View Dependent Claims (39, 40, 41, 42, 43, 44, 45, 46, 47)
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48. In an optical apparatus comprising an image-forming member that forms an image to be observed, and an ocular optical system provided to lead said image to an eyeball of an observer,
the improvement wherein said ocular optical system includes, in order from an image side thereof, a third surface that forms an entrance surface, a first surface that forms both a reflecting surface and an exit surface, and a second surface that forms a reflecting surface, said first, second, and third surfaces being integrally formed to face each other across a medium, at least one of said first, second, and third surfaces is formed from a rotationally asymmetric curved surface that corrects aberration produced by a decentered surface, and an optical member is placed between said ocular optical system and the eyeball of said observer, said optical member transmitting light exiting from said ocular optical system.
Specification