US3740119A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical lenticular grid for display apparatus
Assignee: Sansui Electric Co Ltd
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Filing: 1971-03-16
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Granted: 1973-06-19
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Expires: 1991-03-16
Abstract
Abstract An optical grid of a plurality of optically elongated or circular lenses formed in juxtaposed parallel or concentric relation, respectively, with each of said lenses having a characteristic arcuate contour of polygonal shaped cross-section which is symmetrical on either side of a line passing through the center of the lens. The optical grid is employed in a display apparatus having a guide frame with a movable frame reciprocative in the guide frame. A projecting screen is provided on the front face of the guide frame behind which, in spaced relation, is positioned the optical grid. The front face of the movable frame is provided with an artwork grid, the subject matter of which is displayed on the projecting screen through the optical grid. Illuminating means for the artwork grid are located on the rear face of the movable frame.
Inventors
- 👤 K Kazama
- 👤 T Sakurai
- 👤 S Tada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:06
CPC Classifications
G; G02; G02B; G02B3/00; G02B3/02; G02B3/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
114 words
A split image optical grid for providing a plurality of images from a single artwork image on an artwork grid when viewed through said optical grid, said optically produced images not overlapping as the focal distance is varied between said grids, comprising a plurality of optically elongated lenses formed in juxtaposed parallel relation, each of said lenses provided with a plurality of polygonal surfaces arcuately disposed concentrically relative to a center point of equal distant from each of said polygonal surfaces, the number of said polygonal surfaces of even number and forming in degree a semicircular arrangement wherein the center point and end points of each of said lenses are within a common plane.
Claim 2
Dependent Claim
114 words
A split image optical grid for providing a plurality of images from a single artwork image on an artwork grid when viewed through said optical grid, said optically produced images not overlapping as the focal distance is varied between said grids, comprising a plurality of optically elongated lenses formed in juxtaposed parallel relation, each of said lenses provided with a plurality of polygonal surfaces arcuately disposed concentrically relative to a center point of equal distant from each of said polygonal surfaces, the number of said polygonal surfaces of even number and forming in degree a semicircular arrangement wherein the center point and end points of each of said lenses are within a common plane.
Claim 3
Dependent Claim
10 words
The optical grid of claim 1 characterized as being transparent.
Claim 4
Dependent Claim
10 words
The optical grid of claim 1 characterized as being semitransparent.
Claim 5
Dependent Claim
20 words
The optical grid of claim 1 characterized in that each of said polygonal arcuate lenses have a plano-convex type contour.
Claim 6
Dependent Claim
20 words
The optical grid of claim 1 characterized in that each of said polygonal arcuate lenses have a plano-concave type contour.
Claim 7
Dependent Claim
24 words
The optical grid of claim 1 characterized in that each of said lenses comprising said grid are arranged as a plurality of concentric circles.
Claim 8
Dependent Claim
10 words
The optical grid of claim 6 characterized as being transparent.
Claim 9
Dependent Claim
10 words
The optical grid of claim 6 characterized as being semitransparent.
Claim 10
Dependent Claim
21 words
The optical grid of claim 6 characterized in that each of said polygonal arcuate circular lenses have a plano-convex type contour.
Claim 11
Dependent Claim
22 words
The optical grid of claim 6 characterized in that of each of said polygonal arcuate circular lenses have a plano-concave type contour.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |