US3909525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display system optics
Assignee: Boeing North American Inc
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Filing: 1973-12-10
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Granted: 1975-09-30
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Expires: 1993-12-10
Abstract
Abstract An array of laterally-abutted Fresnel magnifying lenses in combination with an aligned array of image generators having particular spaced-apart objective images derived from an original image, displays such objective images for viewing as a unitary magnified original image without noticeable overlap or distortion throughout an appreciable theater space.
Inventors
- 👤 James R Fagan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:41
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/28; G; G02; G02B; G02B3/00; G02B3/02; G02B3/08; H04N9/00; H04N9/12; H04N9/31; H04N9/3141; H04N9/3147
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
154 words
In a magnified image display system, in combination: an array of magnifying Fresnel lenses, each Fresnel lens in said array of Fresnel lenses laterally abutting an adjacent Fresnel lens and having an optical center, an array of image generators, each image generator in said array of image generators having an optical cEnter aligned with a different one of said Fresnel lens optical centers along an associated viewing axis and having an image display area spaced-apart from the display area of an adjacent image generator in said array of image generators, and an array of spaced-apart image modules displayed at said image generator image display areas, each image module in said array of image modules having a unique image area and an overlap image area joining said unique image area, each said image module overlap image area duplicating image details of the unique image area displayed most adjacent thereto at another of said image modules.
Claim 2
Dependent Claim
154 words
In a magnified image display system, in combination: an array of magnifying Fresnel lenses, each Fresnel lens in said array of Fresnel lenses laterally abutting an adjacent Fresnel lens and having an optical center, an array of image generators, each image generator in said array of image generators having an optical cEnter aligned with a different one of said Fresnel lens optical centers along an associated viewing axis and having an image display area spaced-apart from the display area of an adjacent image generator in said array of image generators, and an array of spaced-apart image modules displayed at said image generator image display areas, each image module in said array of image modules having a unique image area and an overlap image area joining said unique image area, each said image module overlap image area duplicating image details of the unique image area displayed most adjacent thereto at another of said image modules.
Claim 3
Dependent Claim
90 words
The system defined by claim 1 wherein each said Fresnel lens presents a virtual image at a magnification of M relative to its associated image generator display area, has an f number fN, and has a cone angle Alpha relative to viewing acceptance along its associated viewing axis, and wherein each said displayed image module display area has an effective diameter d, said displayed image module overlap area having a ratio of lateral extent relative to the lateral extent of said displayed image module unique area in the amount of:
Claim 4
Dependent Claim
56 words
The system defined by claim 1 wherein said image generators are television cathode ray tubes, and wherein each displayed image module has a lateral extent and an elevational extent, said image module lateral and elevational extents corresponding respectively to the unblanked horizontal and vertical sweep extents of the electron beam of said television cathode ray tubes.
Claim 5
Dependent Claim
98 words
The invention defined by claim 1 wherein one abutting pair of Fresnel lenses in said array of magnifying Fresnel lenses and an associated pair of image generator display areas in said array of image generators are arranged in parallel lateral planes free of curvature, the optical centers of said pair of Fresnel lenses being laterally offset laterally inwardly with respect to the optical centers of said pair of image generator display areas whereby the viewing axes associated with said pairs pass through said offset optical centers oblique to said parallel lateral planes and converge at a viewing point.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |