US3658404A
Expired / Lapsed
US
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Complex wave modifying structure holographic system
Assignee: RCA Corp
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Filing: 1969-03-27
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Granted: 1972-04-25
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Expires: 1989-03-27
Abstract
Abstract The use of a particular complex wave modifying structure for making a special type of hologram. This structure, which works on the principles of optics, in the preferred embodiments can be a pinhole plate or lens array which when illuminated by a first portion of coherent wave energy produces a plurality of similar but separate spaced divergent reference beams. The special type of hologram results from interference at the surface of or in a recording medium between an information beam obtained from an object illuminated by a first component of coherent wave energy with second component consisting of each of the separate spaced reference beams. This special type of hologram, when read out by a proper single readout beam of wave energy, produces a separate image of the object corresponding to each and every one of the spaced reference beams.
Inventors
- 👤 David L Greenaway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:55
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/32; G03; G03H; G03H1/00; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
175 words
A holographic method for obtaining a predetermined array of a given plurality of substantially identical spaced optical real representations of the same given object, comprising the steps of recording on an optical recording medium the holographic interference pattern which results from the simultaneous illumination of said medium by each of a group of mutually coherent components of the same coherent monochromatic light of a given wavelength, said group including a single component of said coherent light that is spatially modulated in accordance with said object and each of a predetermined array of a corresponding plurality of spaced other components of said coherent light equal in number to said given plurality which are arranged in said predetermined array, each respective one of said other components being spatially unmodulated and having a different angular orientation with respect to said single component at said medium, and reading out said recorded holographic interference pattern with a single readout beam which corresponds in angular orientation with respect to said medium to a selected certain single one of said other components.
Claim 2
Dependent Claim
175 words
A holographic method for obtaining a predetermined array of a given plurality of substantially identical spaced optical real representations of the same given object, comprising the steps of recording on an optical recording medium the holographic interference pattern which results from the simultaneous illumination of said medium by each of a group of mutually coherent components of the same coherent monochromatic light of a given wavelength, said group including a single component of said coherent light that is spatially modulated in accordance with said object and each of a predetermined array of a corresponding plurality of spaced other components of said coherent light equal in number to said given plurality which are arranged in said predetermined array, each respective one of said other components being spatially unmodulated and having a different angular orientation with respect to said single component at said medium, and reading out said recorded holographic interference pattern with a single readout beam which corresponds in angular orientation with respect to said medium to a selected certain single one of said other components.
Claim 3
Dependent Claim
30 words
The method defined in claim 1, wherein said selected certain single one of said other components is the most centrally located of all of said other components within said array.
Claim 4
Dependent Claim
45 words
The method defined in claim 1, wherein said readout beam is coherent monochromatic light of said given wavelength, and wherein the angular orientation of said readout beam with respect to said medium is the conjugate of said selected certain single one of said other components.
References Cited (Backward Citations)
US3506327A
Cited
US3582177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |