Optical system and optical apparatus
First Claim
1. An image display apparatus comprising an image display device for displaying an image, and an ocular optical system for projecting the image displayed by said image display device and for leading the projected, image to an observer'"'"'s eyeball,said ocular optical system having at least three optical surfaces, wherein a space formed by said at least three optical surfaces is filled with a medium having a refractive index larger than 1, said at least three optical surfaces being defined as a first surface, a second surface, and a third surface, respectively, in order in which light rays pass in backward ray tracing from said observer'"'"'s eyeball to said image display device, and said at least three optical surfaces being disposed such that light rays pass in said backward ray tracing from said observer'"'"'s eyeball pass through the first surface and are reflected by the second surface and further reflected by the third surface, which is a reflecting surface having positive power, and the light rays reflected by said third surface are reflected by said first surface and pass through said second surface to reach said image display device.
1 Assignment
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Accused Products
Abstract
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. The image display apparatus has an image display device (7) and an ocular optical system (8) for projecting the image of the image display device (7) and leading the projected image to an observer'"'"'s eyeball (1). The ocular optical system (8) has at least three optical surfaces, and a space formed by these surfaces is filled with a medium having a refractive index larger than 1. The three optical surfaces are defined as a first surface (3), a second surface (4), and a third surface (5), respectively, in the order in which light rays pass in backward ray tracing from the observer'"'"'s eyeball (1) to the image display device (7). The optical surfaces are disposed such that light rays from the observer'"'"'s eyeball (1) pass through the first surface (3) and are reflected by the second surface (4) and further reflected by the third surface (5), which is a reflecting surface having positive power, and the light rays reflected by the third surface (5) are reflected by the first surface (3) and pass through the second surface (4) to reach the image display device (7).
42 Citations
60 Claims
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1. An image display apparatus comprising an image display device for displaying an image, and an ocular optical system for projecting the image displayed by said image display device and for leading the projected, image to an observer'"'"'s eyeball,
said ocular optical system having at least three optical surfaces, wherein a space formed by said at least three optical surfaces is filled with a medium having a refractive index larger than 1, said at least three optical surfaces being defined as a first surface, a second surface, and a third surface, respectively, in order in which light rays pass in backward ray tracing from said observer'"'"'s eyeball to said image display device, and said at least three optical surfaces being disposed such that light rays pass in said backward ray tracing from said observer'"'"'s eyeball pass through the first surface and are reflected by the second surface and further reflected by the third surface, which is a reflecting surface having positive power, and the light rays reflected by said third surface are reflected by said first surface and pass through said second surface to reach said image display device.
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8. An image display apparatus comprising an image display device for displaying an image, and an ocular optical system for projecting the image displayed by said image display device and for leading the projected image to an observer'"'"'s eyeball,
said ocular optical system having at least four optical surfaces, wherein a space formed by said at least four optical surfaces is filled with a medium having a refractive index larger than 1, said at least four optical surfaces being defined as a first surface, a second surface, a third surface, and a fourth surface, respectively, in order in which light rays pass in backward ray tracing from said observer'"'"'s eyeball to said image display device, and said at least four optical surfaces being disposed such that light rays pass in backward ray tracing from said observer'"'"'s eyeball pass through the first surface and are reflected by the second surface and further reflected by the third surface, which is a reflecting surface having positive power, and the light rays reflected by said third surface are reflected by said first surface and pass through the fourth surface to reach said image display device.
- 19. An ocular optical system disposed between an image plane and a pupil,
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38. An image-forming optical system which forms an image of an object,
said image-forming optical system comprising at least one prism member,
- 59. An optical system disposed between an image plans and a pupil,
Specification