Image display apparatus having a reflecting surface that bends light rays
First Claim
1. An image display apparatus, comprising:
- an image display device for displaying an image;
a relay optical system for relaying said image to form a relay image; and
an ocular optical system including;
a reflecting surface that bends light rays emanating from said relay optical system and forming an exit pupil of said relay image,an entrance-side optical surface provided in an optical path extending from said relay optical system to said reflecting surface, andan exit-side optical surface provided in an optical path along which said light rays bent by said reflecting surface travel to reach said exit pupil, said exit-side optical surface having a power different from that of said entrance-side optical surface,said entrance-side optical surface, said exit-side optical surface and said reflecting surface being integrated in a form of a prism with an optical member having a refractive index (n) larger than 1 (n>
1) put therebetween.
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Accused Products
Abstract
A compact image display apparatus having a wide exit pupil diameter, which enables observation of an image that is flat and clear as far as the edges of visual field at a field angle of 40° or more. The apparatus includes an image display device (8) for displaying an image, a relay optical system (7) for relaying the image to form a relay image, and an ocular optical system having a reflecting surface (2) that bends a bundle of light rays emanating from the relay optical system (7) and forming an exit pupil (1) of the relay image. The ocular optical system has an entrance-side optical surface (6) provided in an optical path extending from the relay optical system (7) to the reflecting surface (2), and an exit-side optical surface (5) provided in an optical path along which the ray bundle bent by the reflecting surface travels to reach the exit pupil (1) and having a power different from that of the entrance-side optical surface (6).
55 Citations
34 Claims
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1. An image display apparatus, comprising:
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an image display device for displaying an image; a relay optical system for relaying said image to form a relay image; and an ocular optical system including; a reflecting surface that bends light rays emanating from said relay optical system and forming an exit pupil of said relay image, an entrance-side optical surface provided in an optical path extending from said relay optical system to said reflecting surface, and an exit-side optical surface provided in an optical path along which said light rays bent by said reflecting surface travel to reach said exit pupil, said exit-side optical surface having a power different from that of said entrance-side optical surface, said entrance-side optical surface, said exit-side optical surface and said reflecting surface being integrated in a form of a prism with an optical member having a refractive index (n) larger than 1 (n>
1) put therebetween. - View Dependent Claims (2, 6, 7, 8)
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3. An image display apparatus comprising:
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an image display device for displaying an image; a relay optical system for relaying said image to form a relay image; and an ocular optical system including; a reflecting surface that bends light rays emanating from said relay optical system and forming an exit pupil of said relay image, an entrance-side optical surface provided in an optical path extending from said relay optical system to said reflecting surface, said entrance-side optical surface having a negative power, and an exit-side optical surface provided in an optical path along with said light rays bent by said reflecting surface travel to reach said exit pupil, said exit-side optical surface having a power different from that of said entrance-side optical surface, said exit-side optical surface having a positive power, wherein said reflecting surface is a semitransparent reflecting surface that transmits a part of incident light rays and reflects a remainder of said incident light rays. - View Dependent Claims (9, 10, 11, 12)
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4. An image display apparatus, comprising:
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an image display device for displaying an image; a relay optical system for relaying said image to form a relay image; and an ocular optical system including; a reflecting surface that bends light rays emanating from said relay optical system and forming an exit pupil of said relay image, said reflecting surface being a semitransparent reflecting surface that transmits a part of incident light rays and reflects a remainder of said incident light rays, said reflecting surface being an aspherical surface, at least an optical surface of positive power in an optical path along which said light rays bent by said reflecting surface travel to reach said exit pupil.
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5. An image display apparatus comprising:
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a face-mounted unit which includes an image display device for displaying an image; a relay optical system for relaying said image to form a relay image; an ocular optical system including; a reflecting surface that bends light rays emanating from said relay optical system and forming an exit pupil of said relay image, said reflecting surface being a semitransparent reflecting surface that transmits a part of incident light rays and reflects a remainder of said incident light rays, said reflecting surface being an aspherical surface, and at least an optical surface of positive power in an optical path along which said light rays bent by said reflecting surface travel to reach said exit pupil; and a support member for retaining said face-mounted unit on an observer'"'"'s head.
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13. An image display apparatus, comprising:
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an image display device for displaying an image;
a relay optical system for relaying said image to form a relay image; and
an ocular optical system including;a reflecting surface that bends light rays emanating from said relay optical system and forming an exit pupil of said relay image, said reflecting surface being an aspherical surface, an entrance-side optical surface provided in an optical path extending from said relay optical system to said reflecting surface, and an exit-side optical surface provided in an optical path along which said light rays bent by said reflecting surface travel to reach said exit pupil, said exit-side optical surface having a power different from that of said entrance-side optical surface. - View Dependent Claims (15, 16)
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14. An image display apparatus, comprising:
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an image display device for displaying an image; a relay optical system for relaying said image to form a relay image; and an ocular optical system including; a reflecting surface that bends light rays emanating from said relay optical system and forming an exit pupil of said relay image, said reflecting surface being an aspherical surface, and at least an optical surface of positive power in an optical path along which said light rays bent by said reflecting surface travel to reach said exit pupil.
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17. An image display apparatus, comprising:
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an image display device for displaying an image; a relay optical system for relaying said image to form a relay image; and an ocular optical system including; a reflecting surface that bends light rays emanating from said relay optical system and forming an exit pupil of said relay image, said reflecting surface being an aspherical surface, and at least an optical surface of positive power in an optical path along which said light rays bent by said reflecting surface travel to reach said exit pupil; said image display apparatus satisfying the following condition;
space="preserve" listing-type="equation">D>
30 (millimeters)where D is a distance between said reflecting surface and said exit pupil.
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18. An image display apparatus comprising:
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a face-mounted unit which includes an image display device for displaying an image; a relay optical system for relaying said image to form a relay image; an ocular optical system including; a reflecting surface that bends light rays emanating from said relay optical system and forming an exit pupil of said relay image, said reflecting surface being an aspherical surface, and at least an optical surface of positive power in an optical path along which said light rays bent by said reflecting surface travel to reach said exit pupil; and a support member for retaining said face-mounted unit on an observer'"'"'s head; said image display apparatus satisfying the following condition;
space="preserve" listing-type="equation">D>
30 (millimeters)where D is a distance between said reflecting surface and said exit pupil.
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19. In an image display apparatus comprising:
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a face-mounted unit including an image display device having an image display surface for displaying an image, and an ocular optical system for leading said image to an observer'"'"'s eyeball, and a support member for retaining said face-mounted unit on an observer'"'"'s head; the improvement wherein said ocular optical system includes; at least an entrance-side optical surface, a reflecting surface, and an exit-side optical surface; said entrance-side optical surface, said reflecting surface and said exit-side optical surface being integrated in a form of a prism with an optical member having a refractive index (n) larger than 1(n>
1) disposed therebetween;said entrance-side optical surface being disposed to face said image display surface so that light rays emanating from said image display surface can enter said prism through said entrance-side optical surface; said reflecting surface being disposed on an observers visual axis to reflect the light ray that entered through said entrance-side optical surface so that said light rays can pass through said prism and exit from said exit-side optical surface; said exit-side optical surface being disposed on said observer'"'"'s visual axis closer to said observer'"'"'s eyeball than said reflecting surface so that said light rays reflected by said reflecting surface can be led to said observer'"'"'s eyeball; and said reflecting surface being an aspherical surface having an effect of correcting aberrations produced by said prism. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. An image display apparatus, comprising:
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an image display device for displaying an image; a relay optical system for relaying said image to form a relay image; and an ocular optical system including; a reflecting surface that bends light rays emanating from said relay optical system and forming an exit pupil of said relay image, said reflecting surface being a semitransparent reflecting surface that transmits a part of incident light rays and reflects a remainder of said incident light rays, at least an optical surface of positive power in an optical path along which said light rays bent by said reflecting surface travel to reach said exit pupil, said relay optical system being formed from a plurality of optical elements, at least one of said optical elements being decentered with respect to an axis perpendicular to said image.
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34. An image display apparatus comprising:
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a face-mounted unit which includes an image display device for displaying an image; a relay optical system for relaying said image to form a relay image; an ocular optical system including; a reflecting surface that bends light rays emanating from said relay optical system and forming an exit pupil of said relay image, said reflecting surface being a semitransparent reflecting surface that transmits a part of incident light rays and reflects a remainder of said incident light rays, and at least an optical surface of positive power in an optical path along which said light rays bent by said reflecting surface travel to reach said exit pupil; and a support member for retaining said face-mounted unit on an observer'"'"'s head, said relay optical system being formed from a plurality of optical elements, at least one of said optical elements being decentered with respect to an axis perpendicular to said image.
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Specification