US3632869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Partially overlapping hologram motion picture record
Assignee: RCA Corp
•
Filing: 1969-11-25
•
Granted: 1972-01-04
•
Expires: 1989-11-25
Abstract
Abstract In a motion picture record in which successive frames of a motion picture are manifested by a series of successive holograms, such as phase holograms, greater redundancy and a saving in record material are achieved by having each one of the holograms partially overlap both the hologram which immediately precedes and the hologram which immediately succeeds that hologram in the series. The problem of unwanted spatial beat frequencies, which results from such overlap and is dependent on the amount of such overlap, can be eliminated by restricting the amount of overlap to a value such that the minimum spatial beat frequency is less than the ultimate resolution of the playback system (e.g. closed circuit television) employed in reconstructing the motion picture from the motion picture record.
Inventors
- 👤 Robert Alfred Bartolini
- 👤 Michael Jay Lurie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:08
CPC Classifications
G; G03; G03H; G03H1/00; G03H1/26
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
202 words
In a system for playing back a motion picture record wherein successive frames of a motion picture are manifested by a series of successive phase holograms each of which has substantially the same given size, wherein said system includes said record, means for sequentially illuminating said phase holograms with a readout beam of wave energy to sequentially obtain reconstructed real images of said motion picture frames in a given area of space and image responsive means including a wave sensitive surface element coincident with said given area and means coupled to said element for viewing said motion picture, said image responsive means having a given resolution capability; the improvement therewith wherein each one of said phase holograms partially overlaps by a given amount both the phase hologram which immediately precedes and the phase hologram which immediately succeeds that one of said phase holograms in said series, whereby said reconstructed images of said phase holograms includes spatial beat frequencies having a minimum value which dePends on said given amount of overlap, said given amount of overlap being of such a value that the value of said minimum spatial beat frequency is no less than said ultimate resolution capability of said image responsive means.
Claim 2
Dependent Claim
202 words
In a system for playing back a motion picture record wherein successive frames of a motion picture are manifested by a series of successive phase holograms each of which has substantially the same given size, wherein said system includes said record, means for sequentially illuminating said phase holograms with a readout beam of wave energy to sequentially obtain reconstructed real images of said motion picture frames in a given area of space and image responsive means including a wave sensitive surface element coincident with said given area and means coupled to said element for viewing said motion picture, said image responsive means having a given resolution capability; the improvement therewith wherein each one of said phase holograms partially overlaps by a given amount both the phase hologram which immediately precedes and the phase hologram which immediately succeeds that one of said phase holograms in said series, whereby said reconstructed images of said phase holograms includes spatial beat frequencies having a minimum value which dePends on said given amount of overlap, said given amount of overlap being of such a value that the value of said minimum spatial beat frequency is no less than said ultimate resolution capability of said image responsive means.
Claim 3
Dependent Claim
115 words
The system defined in claim 1, wherein said sequential illuminating means includes a laser for providing optical energy at a given wavelength for producing said readout beam and shutterless means coupled to said record for moving said series of phase holograms in sequence in cooperative relationship with said readout beam to continuously reconstruct real images of said motion picture frames in said given area of space, and wherein said image responsive means comprises closed circuit television apparatus including television camera means having a photosensitive surface element coincident with said given area of space and television viewing means for displaying the reconstructed real images of said motion picture frames picked up by said television camera means.
Claim 4
Dependent Claim
68 words
The system defined in claim 2, wherein each of said phase holograms is a Fraunhoffer hologram, and wherein said sequential illuminating means further includes convex lens means having a given focal length, said lens lying in the path of a first order diffraction beam resulting from illumination of said phase holograms by said readout beam with said photosensitive surface element lying in the focal plane of said lens.
Claim 5
Dependent Claim
71 words
The system defined in claim 5, wherein each of said phase holograms is composed of redundant displaced overlapping subholograms, whereby said minimum beat frequency also depends upon the spacing between said subholograms and, hence, the amount of partial overlap between successive phase holograms of said series to maintain said minimum beat frequency no less than said ultimate resolution capability of said playback system is dependent upon the spacing between said subholograms.
Claim 6
Dependent Claim
29 words
The system defined in claim 1, wherein said record is a transparent tape having said phase holograms impressed thereon with said series oriented along the length of said tape.
References Cited (Backward Citations)
GB1139955A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-03 | 1975-07-05 | 1976-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-03 | 1979-07-05 | 1980-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-03 | 1983-07-05 | 1984-01-04 | $7700.00 | Window Closed / Lapsed |