Patent US3695744A successfully refreshed from Google Patents.
US3695744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Holographic multicolor technique
Assignee: RCA Corp
•
Filing: 1971-01-14
•
Granted: 1972-10-03
•
Expires: 1991-01-14
Abstract
Abstract By successively recording a plurality of surface holograms, each of which manifests a different color component of any multicolor scene, on the same area of a recording medium, the multicolor scene is recorded in holographic form without any undesirable interaction among the various recorded holograms. This is accomplished by choosing a different meridional angle with respect to the recording medium for each separate hologram. During playback, by simultaneously illuminating the recorded multicolor scene in holographic form with separate beams of light, which need not be coherent, each of which corresponds in color to the color manifested by a different one of the plurality of recorded holograms, a multicolored image of the recorded scene is reconstructed. This is accomplished by angularly orienting each of the colored beams of light with respect to the recording medium in correspondence with the meridional angle of the one of the plurality of holograms manifesting that color.
Inventors
- 👤 Burton Ross Clay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:23
CPC Classifications
G; G03; G03H; G03H1/00; G03H1/26
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
367 words
A holographic multicolor system for recording with a source of coherent light of the same given wavelength all of the component holograms of a composite redundant hologram which manifests a multicolor scene with a given resolution, said composite hologram on playback being illuminated with a plurality of non-coherent lights of different colors to reconstruct a multicolor image of said scene, said system comprising; a. a quasi-imaging lens disposed substantially symmetrically about a given axis for imaging An object located in an object plane thereof in an image plane thereof normal to said given axis, said quasi-imaging lens having a given depth of focus, b. means for disposing a recording medium normal to said given axis and located in a plane spaced a given distance from but substantially parallel to said image plane, said given distance being no greater than 20 times said given depth of focus so that a given area of said recording medium is illuminated by coherent light having a given curvature and having a direction substantially normal to said medium in response to an object in said object plane being illuminated by an object-illuminating beam of coherent light from said source, said recording medium being rotatable about said given axis to each of a plurality of different predetermined meridional angles situated in the plane thereof which individually correspond with each different color component of said multicolor scene, c. a reference beam lens responsive to the illumination thereof with a reference beam of said coherent light for illuminating said given area of said recording medium with coherent light having said given curvature and having a direction oblique to said medium, and d. illuminating means for illuminating in sequence said quasiimaging lens with a different one of a plurality of object information beams of said coherent light each of which has been individually spatially modulated in accordance with a respective object in said object plane that manifests a different color component of said multicolor scene while said recording medium occupies that meridional angle which corresponds with that color component, and during each respective one of said sequential illuminations said illuminating means also simultaneously illuminating said reference beam lens with said reference beam of said coherent light.
Claim 2
Dependent Claim
367 words
A holographic multicolor system for recording with a source of coherent light of the same given wavelength all of the component holograms of a composite redundant hologram which manifests a multicolor scene with a given resolution, said composite hologram on playback being illuminated with a plurality of non-coherent lights of different colors to reconstruct a multicolor image of said scene, said system comprising; a. a quasi-imaging lens disposed substantially symmetrically about a given axis for imaging An object located in an object plane thereof in an image plane thereof normal to said given axis, said quasi-imaging lens having a given depth of focus, b. means for disposing a recording medium normal to said given axis and located in a plane spaced a given distance from but substantially parallel to said image plane, said given distance being no greater than 20 times said given depth of focus so that a given area of said recording medium is illuminated by coherent light having a given curvature and having a direction substantially normal to said medium in response to an object in said object plane being illuminated by an object-illuminating beam of coherent light from said source, said recording medium being rotatable about said given axis to each of a plurality of different predetermined meridional angles situated in the plane thereof which individually correspond with each different color component of said multicolor scene, c. a reference beam lens responsive to the illumination thereof with a reference beam of said coherent light for illuminating said given area of said recording medium with coherent light having said given curvature and having a direction oblique to said medium, and d. illuminating means for illuminating in sequence said quasiimaging lens with a different one of a plurality of object information beams of said coherent light each of which has been individually spatially modulated in accordance with a respective object in said object plane that manifests a different color component of said multicolor scene while said recording medium occupies that meridional angle which corresponds with that color component, and during each respective one of said sequential illuminations said illuminating means also simultaneously illuminating said reference beam lens with said reference beam of said coherent light.
Claim 3
Dependent Claim
99 words
The system defined in claim 1, said medium disposing means including a preset angularly adjustable hologram holder for supporting said recording medium in said plane thereof, said holder being rotatable about said given axis for adjusting said recording medium to at least first, second and third different predetermined meridional angular positions in the plane of said medium any two of which differ by an amount intermediate 0 and 180*, and wherein each of said first, second and third different predetermined meridional angular positions individually corresponds to a different one of the three primary additive colors of said multicolor scene.
Claim 4
Dependent Claim
65 words
The system defined in claim 2, wherein any one of said predetermined angular positions differs by at least 10* and at most 170* from any other of said predetermined angular positions, and the lowest common denominator of the ratio of the differences between any one pair of said predetermined angular positions and between any other pair of said predetermined angular positions is greater than unity.
Claim 5
Dependent Claim
47 words
The system defined in claim 2, wherein said illuminating means includes a separate color separation transparency corresponding to each primary additive color which when inserted in the object plane of said quasi-imaging lens and illuminated by said coherent light forms said object-information beam corresponding to that color.
Claim 6
Dependent Claim
65 words
The system defined in claim 1, wherein said quasi-imaging lens has a given aperture, and wherein the size of the smallest information bit of any of said objects manifesting respectively the different color components of said multicolor scene with respect to said given wavelength diffracts said coherent light by no more than a given diffraction angle, said given aperture substantially subtending said given diffraction angle.
References Cited (Backward Citations)
US3580655A
Cited
US3488101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |