US3761154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display device generating many superimposed output signals to provide an image
Assignee: Bendix Corp
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Filing: 1971-12-27
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Granted: 1973-09-25
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Expires: 1991-12-27
Abstract
Abstract An image is formed by generating a large number of simple interference patterns and sequentially projecting those interference patterns onto an organic dye cell amplifier. The amplifier absorbs energy from the interference patterns and uses the absorbed energy to modulate a beam of laser light to provide a sequence of output signals. No one output signal comprises a complete image, and a large number of output signals must be integrated or superimposed in order to form an image. However, the output signals are generated at such a fast rate that an observer''s eyes will integrate those signals so that the observer perceives them as a complete image. The observer''s eyes integrate successive output images to perceive a changing scene.
Inventors
- 👤 D Shupe
- 👤 T Sawatari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:24
CPC Classifications
G; G03; G03H; G03H1/00; G03H1/04; G03H1/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
181 words
A device for synthesizing a three-dimensional image of a scene comprising: signal generating means for generating a large number of simple interference signals at a sufficiently fast rate to provide a sequence of signals representing a hologram within a time interval equal to the integration time of an observer''s eyes, each simple interference signal representing the interference of wave energy from two point sources; means for providing a beam of laser light; and an amplifying dye cell medium positioned to receive said interference signals and said beam of laser light for absorbing energy from said interference signals and utilizing the absorbed energy to differentially amplify said beam of laser light in accordance with the intensity distribution of the absorbed energy, said medium having a short integration time causing the medium to retain each interference pattern only for a time substantially shorter than the time required to provide a sufficient number of simple interference patterns to form a hologram and thereby provide a large number of output signals in sequence to be integrated by the observer''s eyes into a complete three-dimensional image.
Claim 2
Independent Claim
181 words
A device for synthesizing a three-dimensional image of a scene comprising: signal generating means for generating a large number of simple interference signals at a sufficiently fast rate to provide a sequence of signals representing a hologram within a time interval equal to the integration time of an observer''s eyes, each simple interference signal representing the interference of wave energy from two point sources; means for providing a beam of laser light; and an amplifying dye cell medium positioned to receive said interference signals and said beam of laser light for absorbing energy from said interference signals and utilizing the absorbed energy to differentially amplify said beam of laser light in accordance with the intensity distribution of the absorbed energy, said medium having a short integration time causing the medium to retain each interference pattern only for a time substantially shorter than the time required to provide a sufficient number of simple interference patterns to form a hologram and thereby provide a large number of output signals in sequence to be integrated by the observer''s eyes into a complete three-dimensional image.
Claim 3
Dependent Claim
26 words
The device of claim 1 wherein: said interference signals comprise wave energy signals having a frequency different from the frequency of said beam of laser light.
Claim 4
Dependent Claim
44 words
The device of claim 2 wherein said signal generating means directs each of said interference signals to strike substantially the same position on said medium to thereby cause said output signals to propagate from substantially the same position and be superposed on each other.
Claim 5
Dependent Claim
130 words
The device of claim 3 wherein: said medium comprises an organic dye material having a predetermined integration time for absorbing energy from said interference signals and utilizing said absorbed energy to differentially amplify said beam of laSer light to provide said output signals; said organic dye material utilizes energy absorbed only from interference signals received within a time interval equal to said integration time to provide an output signal, signals received in subsequent time intervals equal to said integration time of said organic dye material being used to provide subsequent output signals; and said integration time of said organic dye material is sufficiently short so that only a small number of the simple interference patterns required to form a holographic interference pattern are used to provide each one output signal.
Claim 6
Dependent Claim
153 words
The device of claim 4 wherein: said signal generating means comprise: means for directing two beams of mutually coherent wave energy to intersect and interfere with each other proximate said medium, said two beams having frequencies slightly different from the frequency of said beam of laser light; and means for rapidly deflecting at least one of said interfering beams in order to produce many different interference patterns; said deflecting means also shifts the frequency of at least one of said interfering beams by a small amount, said frequency shift causing the interference fringes of the pattern produced by said interfering beams to move, said fringe movement degrading the interference pattern; and said integration time of said organic dye material is sufficiently short so that said interference fringes are unable to move a sufficient distance during the time interval in which each one input signal is being formed to significantly degrade any output signal.
Claim 7
Dependent Claim
19 words
The device of claim 5 wherein said deflecting means provides a frequency shift on the order of 200 MHz.
Claim 8
Dependent Claim
48 words
The device of claim 5 wherein: said deflecting means produce at least 1,000 different interference patterns within approximately one-thirthieth of a second, said at least 1,000 patterns being required to form a hologram; and said organic dye material has an integration time less than approximately 10 8 seconds.
Claim 9
Dependent Claim
45 words
The device of claim 7 in which said signal generating means is adapted to provide subsequent sequences of different interference patterns to thereby provide a sequence of different images, an observer perceiving said sequence of images as a real time view of a changing scene.
References Cited (Backward Citations)
US3542452A
Cited
US3547509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |