Patent US4661944A successfully refreshed from Google Patents.
Patent US3593029A successfully refreshed from Google Patents.
US3593029A
Expired / Lapsed
US
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Analog to digital converter with graphic display employing holographic techniques
Assignee: NEC Corp
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Filing: 1969-11-19
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Granted: 1971-07-13
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Expires: 1989-11-19
Abstract
Abstract A tablet device for use as a graphic display device includes a hologram plate on which interference patterns are selectively stored by irradiation of the plate by binary-code-modulated coherent light rays and a reference light beam. In a readout operation, the plate is irradiated by a thin light beam which produces first order diffraction light rays which denote the data stored in the irradiated area on the plate.
Inventors
- 👤 Mitsuhito Sakaguchi
- 👤 Nobuo Nishida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:17
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/03; G06F3/0304; G06F3/0317; G06F3/0321; G09; G09G; G09G3/00; G09G3/001; G09G3/003
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
109 words
A system for providing a graphic display of an input analog signal and for converting the input analog signal to a corresponding binary signal, comprising a hologram plate having an array of elementary interference patterns stored thereon, each of said patterns being for converting said diffraction image into a corresponding binary signal, and means including a photochromic plate positioned substantially parallel to and adjacent said hologram plate for receiving said nondiffracted component on one surface thereof and means for directing ultraviolet radiation of the other surface thereof for displaying said nondiffracted component, thereby to form the graphic display of the locus of the beam produced by said irradiating means.
Claim 2
Independent Claim
109 words
A system for providing a graphic display of an input analog signal and for converting the input analog signal to a corresponding binary signal, comprising a hologram plate having an array of elementary interference patterns stored thereon, each of said patterns being for converting said diffraction image into a corresponding binary signal, and means including a photochromic plate positioned substantially parallel to and adjacent said hologram plate for receiving said nondiffracted component on one surface thereof and means for directing ultraviolet radiation of the other surface thereof for displaying said nondiffracted component, thereby to form the graphic display of the locus of the beam produced by said irradiating means.
Claim 3
Dependent Claim
59 words
The device of claim 1, in which said irradiating means comprises a source of coherent light, flexible light guide means having an input end connected to the output end of said light source and focusing means connected to the output end of said light guide means for forming the coherent light from said source into said collimated light beam.
Claim 4
Dependent Claim
34 words
The device of claim 2, further comprising a housing containing said light beam directing means and the output end portion of said light guide means, said housing defining a grip for said irradiating means.
Claim 5
Dependent Claim
19 words
The device of claim 1, further comprising an ultraviolet filter interposed between said hologram plate and said photochromic plate.
Claim 6
Dependent Claim
32 words
The device of claim 1, in which said diffraction image converting means further comprises a shift register having a plurality of storage stages respectively connected to the outputs of said photoelectric converters.
References Cited (Backward Citations)
CA676401A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |