US3739093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for reproducing information recorded in a hologram
Assignee: Hitachi Ltd
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Filing: 1971-07-13
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Granted: 1973-06-12
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Expires: 1991-07-13
Abstract
Abstract A device for reproducing picture information and sound information which are recorded in a hologram in the overlapped manner, wherein the reproduction is performed while the hologram is continuously moved in one direction, a convex lens being used for the reproduction of the picture information while the sound information is reproduced directly from the moving hologram, whereby the picture information is reproduced at a fixed place while allowing a concurrent and continuous reproduction of the sound information.
Inventors
- 👤 Y Kanazawa
- 👤 Y Takeda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:21
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/004; G11B7/0065; H; H04; H04N; H04N5/00; H04N5/76; H04N5/89
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
120 words
A device for concurrently reproducing picture information and sound information which are recorded in a hologram in a completely overlapped manner, comprising: means for continuously moving the hologram in one direction; means for projecting a reference light beam on the hologram; picture reproducing means for receiving the picture component of the information light beam emitted from the hologram irradiated by the reference light beam and reproducing the picture information; lens means disposed between the hologram irradiated by the reference light beam and said picture reproducing means for projecting said picture component of the information light beam on said picture reproducing means; and sound reproducing means for receiving the sound component of said information light beam and reproducing the sound information.
Claim 2
Independent Claim
120 words
A device for concurrently reproducing picture information and sound information which are recorded in a hologram in a completely overlapped manner, comprising: means for continuously moving the hologram in one direction; means for projecting a reference light beam on the hologram; picture reproducing means for receiving the picture component of the information light beam emitted from the hologram irradiated by the reference light beam and reproducing the picture information; lens means disposed between the hologram irradiated by the reference light beam and said picture reproducing means for projecting said picture component of the information light beam on said picture reproducing means; and sound reproducing means for receiving the sound component of said information light beam and reproducing the sound information.
Claim 3
Dependent Claim
52 words
A device as defined in claim 1, wherein said picture reproducing means comprises a screen on which the picture born by said picture component of the information light beam is displayed, means for focusing the picture displayed on said screen, and means for picking up the image focused by said focusing means.
Claim 4
Dependent Claim
42 words
A device as defined in claim 2, wherein said sound reproducing means comprises detector means for detecting the sound information born by said sound component of the information light beam and a digital-to-analogue converter for converting the output of said detector means.
Claim 5
Dependent Claim
42 words
A device as defined in claim 1, wherein said sound reproducing means comprises detector means for detecting the sound information born by said sound component of the information light beam and a digital-to-analogue converter for converting the output of said detector means.
Claim 6
Dependent Claim
150 words
A device as defined in claim 1, wherein said sound reproducing means comprises an array of a plurality of detector means adapted to receive said sound component of the information light corresponding to a row of sound information recorded on the hologram, a corresponding plurality of sIgnal stretcher means each connected to the output of each of said plurality of detector means for temporarily holding the output signal of said detector means, pulse generating means for generating clock pulses, timing means which operates under the control of the output pulse of said pulse generating means and produces a sequence of timing pulses, means for applying each of said timing pulses to each of said signal stretcher means in predetermined order for deriving the held signal from the signal stretcher means, and digital-to-analogue converting means for converting the output pulses of said plurality of signal stretcher means to an analogue signal.
Claim 7
Dependent Claim
52 words
A device as defined in claim 5, wherein said picture reproducing means comprises a screen on which the picture born by said picture component of the information light beam is displayed, means for focusing the picture displayed on said screen, and means for picking up the image focused by said focusing means.
Claim 8
Dependent Claim
35 words
A device as defined in claim 5, wherein said digital-to-analog converter means comprises an adder circuit for combining said output pulses and a digital -analog converter circuit connected to the output of said adder circuit.
Claim 9
Dependent Claim
37 words
A device as defined in claim 1, wherein said picture producing means is an image pick up tube, on whose image screen the picture information born by said picture component of the information light beam is directed.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |