Head or face mounted image display apparatus
First Claim
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 medium has a refractive index larger than 1,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, anda combination of said device and said ocular optical system being provided for each of observer'"'"'s left and right eyeballs so as to lead an image to each of the observer'"'"'s left and right eyeballs.
1 Assignment
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Accused Products
Abstract
The present invention is an optical apparatus, e.g. an image display apparatus, which enables observation of a clear image at a wide field angle with substantially no reduction in the brightness of the observation image, and which is extremely small in size and light in weight and hence unlikely to cause the observer to be fatigued. The optical apparatus has an image display device (6), and an ocular optical system (7) for leading an image of the image display device (6) to an observer'"'"'s eyeball (1). The ocular optical system (7) includes, in order from the image side, a third surface (5) which forms an entrance surface, a first surface (3) which forms both a reflecting surface and an exit surface, and a second surface (4) which forms a reflecting surface. The first to third surfaces (3 to 5) are integrally formed with a medium put therebetween which has a refractive index larger than 1. A bundle of light rays emitted from the image display device (6) enters the ocular optical system (7) while being refracted by the third surface (5) and is internally reflected by the first surface (3) and reflected by the second surface (4). Then, the ray bundle is incident on the first surface (3) again and refracted thereby so as to be projected into the observer'"'"'s eyeball with the observer'"'"'s iris position or eyeball rolling center as the exit pupil (1).
77 Citations
24 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 medium has a refractive index larger than 1, 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, and a combination of said device and said ocular optical system being provided for each of observer'"'"'s left and right eyeballs so as to lead an image to each of the observer'"'"'s left and right eyeballs. - View Dependent Claims (2, 3, 4, 22, 23, 24)
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5. 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 having a refractive index larger than 1, 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, and a combination of said device and said ocular optical system being provided for each of observer'"'"'s left and right eyeballs so as to lead an image to each of the observer'"'"'s left and right eyeballs. - View Dependent Claims (6, 7, 8, 9)
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10. 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 having a refractive index larger than 1, 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, and a combination of said device and said ocular optical system being provided for each of observer'"'"'s left and right eyeballs so as to lead an image to each of the observer'"'"'s left and right eyeballs. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification