Visual display apparatus
First Claim
1. A visual display apparatus comprising:
- first image display means for displaying a first image; and
a first ocular optical system for projecting said first image formed by said first image display means and for leading said first image to a first eye of an observer, said first ocular optical system comprising at least one lens including;
a first semitransparent reflecting surface which has a first center of curvature substantially on an optical axis of said at least one lens,a concave surface directed toward said center of curvature,a second semitransparent reflecting surface which has a second center of curvature at approximately a same position with respect to said optical axis as said first center of curvature, anda single concentric optical system disposed between said first semitransparent reflecting surface and said second semitransparent reflecting surface, said single concentric optical system being formed of a medium having an index of refraction greater than 1.
1 Assignment
0 Petitions
Accused Products
Abstract
A compact and lightweight visual display apparatus having high resolution and a large exit pupil diameter, which enables observation of an image that is flat and clear as far as the edges of the visual field at a wide viewing angle of 30° or more using a planar two-dimensional image display device. The apparatus uses a concentric optical system which provides a flat image surface (4) as an ocular optical system. The concentric optical system has at least two semitransparent reflecting surfaces (2 and 3) which have respective centers of curvature disposed in the vicinity of a pupil (1) and which have respective concave surfaces directed toward the pupil. The semitransparent reflecting surfaces are disposed so that each semitransparent reflecting surface transmits light rays at least once and reflects them at least once.
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Citations
30 Claims
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1. A visual display apparatus comprising:
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first image display means for displaying a first image; and a first ocular optical system for projecting said first image formed by said first image display means and for leading said first image to a first eye of an observer, said first ocular optical system comprising at least one lens including; a first semitransparent reflecting surface which has a first center of curvature substantially on an optical axis of said at least one lens, a concave surface directed toward said center of curvature, a second semitransparent reflecting surface which has a second center of curvature at approximately a same position with respect to said optical axis as said first center of curvature, and a single concentric optical system disposed between said first semitransparent reflecting surface and said second semitransparent reflecting surface, said single concentric optical system being formed of a medium having an index of refraction greater than 1. - View Dependent Claims (2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 14, 15, 16, 27)
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8. A visual display apparatus comprising:
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first display means for displaying a first image for an observer'"'"'s right eye; second display means for displaying a second image for an observer'"'"'s left eye; a first ocular optical system for projecting said first image to said observer'"'"'s right eye, said first ocular optical system comprising; a first concentric optical system including a first semitransparent reflecting surface and a second semitransparent reflecting surface, and a medium disposed between said first semitransparent reflecting surface and said second semitransparent reflecting surface of said first concentric optical system, said medium having an index of refraction greater than 1, said first semitransparent reflecting surface and said second semitransparent reflecting surface of said first concentric optical system having respective centers of curvature at approximately a same position with respect to an optical axis of said first concentric optical system; and a second ocular optical system for protecting said second image to said observer'"'"'s left eye, said second ocular optical system comprising; a second concentric optical system including a first semitransparent reflecting surface and a second semitransparent reflecting surface, a medium disposed between said first semitransparent reflecting surface and said second semitransparent reflecting surface of said second concentric optical system, said medium having an index of refraction greater than 1, said first semitransparent reflecting surface and said second semitransparent reflecting surface of said second concentric optical system having respective centers of curvature at approximately a same position with respect to an optical axis of said second concentric optical system, and said second concentric optical system being juxtaposed with said first concentric optical system and spaced away from said first concentric optical system by a distance substantially equal to an interpupillary distance between said observer'"'"'s right and left eyes.
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17. A visual display apparatus comprising:
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image display means for displaying an image; and an ocular optical system for projecting said image formed by said image display means and for leading said image to an eye of an observer, said ocular optical system including; a first lens having a convex surface on a surface thereof which is closest to said image display means, a second lens of meniscus form which has a convex surface directed toward said image display means, a third lens having a concave surface on a surface thereof which is closest to said eye of said observer, a first semitransparent reflecting surface provided between said first lens and said second lens, and a second semitransparent reflecting surface provided between said second lens and said third lens. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A visual display apparatus comprising:
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image display means for displaying an image; and an ocular optical system for projecting said image formed by said image display means and for leading said image to an eye of an observer, said ocular optical system including; a first lens having a convex surface on a surface thereof which is closest to said image display means, and a second lens of meniscus form which has a convex surface directed toward said image display means, a first semitransparent reflecting surface provided between said first lens and said second lens, and a second semitransparent reflecting surface provided on a surface of said second lens which is closest to said image display means. - View Dependent Claims (24, 25, 26)
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28. A head-mounted visual display apparatus comprising:
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a display for forming a two-dimensional image; and an optical system for directing said two-dimensional image toward an eye of an observer, said optical system consisting of; a meniscus lens having a convex surface directed toward said display, said meniscus lens including; a first semitransparent reflecting surface on a first surface of said meniscus lens, and a second semitransparent reflecting surface on a second surface of said meniscus lens; said meniscus lens being formed of a medium having an index of refraction greater than 1.
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29. A visual display apparatus comprising:
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a display for displaying a 2-D image; and a first lens having a concave surface facing away from said display, said first lens having an overall negative power; a first semitransparent reflecting surface provided on said concave surface of said first lens; a second lens of meniscus shape having a convex surface facing said first semitransparent reflecting surface; a second semitransparent reflecting surface provided on a concave surface of said second lens; and a third lens having a convex surface facing said second semitransparent reflecting surface. - View Dependent Claims (30)
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Specification