Patent US3303284A successfully refreshed from Google Patents.
Patent US4943860A successfully refreshed from Google Patents.
US4943860A
Expired / Lapsed
US
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Three-dimensional photographing and three-dimensional playback device by spatial time-sharing method
Assignee: Individual
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Filing: 1989-03-28
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Granted: 1990-07-24
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Expires: 2009-03-28
Abstract
Abstract A three-dimensional photographing and three-dimensional playback device by spatial time-sharing method has a taking section having a convex lens, an image pickup screen spaced from the convex lens at a distance equal to the focal length of the convex lens, and a pin hole movable on a surface of the convex lens, and a playback section having a cylindrical lens, an image output screen spaced from the cylindrical lens at a distance equal to the focal length of the cylindrical lens, and a vertical slit movable on a surface of the cylindrical lens. The pin hole in the taking section and the vertical slit in the playback section are scanned in synchronization whereby any image can be photographed and played back three-dimensionally without using any special instrument such as polarized glasses, etc.
Inventors
- 👤 Tomohiko Hattori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:23
CPC Classifications
G; G02; G02B; G02B3/00; G02B3/02; G02B3/08; G02B30/00; G02B30/20; G02B30/22; G02B30/24; H; H04; H04N; H04N13/00; H04N13/20; H04N13/204; H04N13/207; H04N13/211; H04N13/296; H04N13/30; H04N13/302; H04N13/32; H04N13/398; H04N13/221; H04N13/332; H04N13/334; H04N13/337
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
157 words
A three-dimensional photographing and three-dimensional playback device by spatial time sharing method comprising: a taking section composed of a convex lens, an image pickup screen and a pin hole movable on a surface or through an inner part of said convex lens, the distance between said convex lens and said image pickup screen being equal to the focal length of said convex lens; and a playback section composed of a lens member selected out of a cylindrical lens and a convex lens, an image output screen and a narrow opening member selected out of a vertical slit and a pin hole, which is movable on a surface or through an inner part of said lens member, the distance between said lens member and said image output screen being equal to the focal length of said lens member: said pin hole in said taking section and said narrow opening member in said playback section being scanned in synchronization.
Claim 2
Dependent Claim
157 words
A three-dimensional photographing and three-dimensional playback device by spatial time sharing method comprising: a taking section composed of a convex lens, an image pickup screen and a pin hole movable on a surface or through an inner part of said convex lens, the distance between said convex lens and said image pickup screen being equal to the focal length of said convex lens; and a playback section composed of a lens member selected out of a cylindrical lens and a convex lens, an image output screen and a narrow opening member selected out of a vertical slit and a pin hole, which is movable on a surface or through an inner part of said lens member, the distance between said lens member and said image output screen being equal to the focal length of said lens member: said pin hole in said taking section and said narrow opening member in said playback section being scanned in synchronization.
Claim 3
Dependent Claim
82 words
A three-dimensional photographing and three-dimensional playback device according to claim 1, wherein said pin hole in said taking section is movable in the horizontal direction, said lens member in said playback section is said cylindrical lens which is convex in the horizontal direction, said narrow opening member is said vertical slit which is movable in the horizontal direction, and said pin hole in said taking section and said vertical slit in said playback section are scanned in synchronization in the horizontal direction.
Claim 4
Dependent Claim
39 words
A three-dimensional photographing and three-dimensional playback device according to claim 1, wherein each of said pin hole and said vertical slit is composed of an electro-optical shutter which can be scanned at high speed in synchronization with each other.
Claim 5
Dependent Claim
33 words
A three-dimensional photographing and three-dimensional playback device according to claim 1, wherein said convex lens is composed of a Fresnel convex lens and said cylindrical lens is composed of a Fresnel cylindrical lens.
References Cited (Backward Citations)
US4367486A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-07-23 | 1994-01-22 | 1994-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-07-23 | 1998-01-22 | 1998-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-07-23 | 2002-01-22 | 2002-07-24 | $7700.00 | Window Closed / Lapsed |