US3832027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic hologram generation from a plurality of two-dimensional views
Assignee: AT&T Inc
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Filing: 1969-03-12
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Granted: 1974-08-27
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Expires: 1989-03-12
Abstract
Abstract A three-dimensional computer display system is described that allows one to generate holograms of computer stored information without having to calculate the hologram. The system uses a computer to calculate and a microfilm plotter to display a multitude of two-dimensional views of a three-dimensional object stored in a computer. These views in turn are recorded sequentially to form a composite hologram comprised of many smaller holograms. While satisfactory images can be reconstructed from such a hologram simply by using a penlight in combination with a monochromatic filter, much better images can be reconstructed in white light from an image hologram formed from the composite hologram.
Inventors
- 👤 M King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:05
CPC Classifications
G; G03; G03H; G03H1/00; G03H1/22; G03H1/24; G03H1/26; G03H1/268; G03H1/04; G03H1/0402; G03H1/0406; G03H1/2249; G03H2001/0413; G03H2001/0421; G03H2001/0423; G03H2001/269; G03H2210/00; G03H2210/20; G03H2210/30; G03H2227/00; G03H2227/05; G03H2227/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
201 words
A method for forming a hologram that can be illuminated to form an optical image of an object comprising the steps of: calculating two-dimensional projections of how the object would appear from at least two different views on a single line and plotting said projections on a display medium to form at least a first representation and a second representation of the object; illuminating the first representation, forming its image on a diffuse screen, and interfering on a first portion of a photosensitive recording medium both light from the image of the first representation of the object and coherent reference light, whereby a first hologram is recorded on the photosensitive medium; and subsequently illuminating the second representation, forming its image on the diffuse screen, and interfering on a second portiOn of the photosensitive recording medium aligned with the first portion both light from the image of the second representation of the object and coherent reference light, whereby a second hologram is recorded on the photosensitive medium, the alignment of the first and second holograms on the photosensitive recording medium being such that when the holograms are viewed a viewer can perceive an image of the object that appears to be three-dimensional.
Claim 2
Independent Claim
201 words
A method for forming a hologram that can be illuminated to form an optical image of an object comprising the steps of: calculating two-dimensional projections of how the object would appear from at least two different views on a single line and plotting said projections on a display medium to form at least a first representation and a second representation of the object; illuminating the first representation, forming its image on a diffuse screen, and interfering on a first portion of a photosensitive recording medium both light from the image of the first representation of the object and coherent reference light, whereby a first hologram is recorded on the photosensitive medium; and subsequently illuminating the second representation, forming its image on the diffuse screen, and interfering on a second portiOn of the photosensitive recording medium aligned with the first portion both light from the image of the second representation of the object and coherent reference light, whereby a second hologram is recorded on the photosensitive medium, the alignment of the first and second holograms on the photosensitive recording medium being such that when the holograms are viewed a viewer can perceive an image of the object that appears to be three-dimensional.
Claim 3
Dependent Claim
159 words
An image hologram that can be illuminated to form an optical image of an object, said hologram being made by the steps of: calculating two-dimensional projections of how the object would appear from at least two different angles of view and plotting said projections on a display medium to form at least a first representation and a second representation of the object; interfering on a first portion of a first photosensitive medium both light from the first representation of the object and coherent reference light, whereby a first hologram is recorded on the first photosensitive medium; interfering on a second portion of the first photosensitive medium both light from the second representation of the object and coherent reference light, whereby a second hologram is recorded on the first photosensitive medium; and interfering on a second photosensitive medium both coherent reference light and real images reconstructed from the holograms recorded on the first photosensitive medium to form an image hologram.
Claim 4
Dependent Claim
159 words
An image hologram that can be illuminated to form an optical image of an object, said hologram being made by the steps of: calculating two-dimensional projections of how the object would appear from at least two different angles of view and plotting said projections on a display medium to form at least a first representation and a second representation of the object; interfering on a first portion of a first photosensitive medium both light from the first representation of the object and coherent reference light, whereby a first hologram is recorded on the first photosensitive medium; interfering on a second portion of the first photosensitive medium both light from the second representation of the object and coherent reference light, whereby a second hologram is recorded on the first photosensitive medium; and interfering on a second photosensitive medium both coherent reference light and real images reconstructed from the holograms recorded on the first photosensitive medium to form an image hologram.
Claim 5
Dependent Claim
52 words
The method of claim 2 wherein the different portions of the first photosensitive medium are defined by a transparent region in an otherwise opaque mask and the method further comprises the step of moving the mask after the first hologram is recorded to cover up the first portion of the photosensitive medium.
Claim 6
Dependent Claim
43 words
The method of claim 2 wherein the two-dimensional projections are imaged in turn onto a back projection screen and light from the images on the back projection screen is interfered with coherent reference light to form the holograms on the first photosensitive medium.
Claim 7
Dependent Claim
52 words
The method of claim 4 wherein the different portions of the first photosensitive medium are defined by a transparent region in an otherwise opaque mask and the method further comprises the step of moving the mask after the first hologram is recorded to cover up the first portion of the photosensitive medium.
Claim 8
Dependent Claim
9 words
A hologram formed by the method of claim 1.
Claim 9
Independent Claim
163 words
A method for forming an image hologram that can be illuminated to form an optical image of an object comprising the steps of: calculating two-dimensional projections of how the object would appear from at least two different angles of view and plotting said projections on a display medium to form at least a first representation and a second representation of the object; interfering on a first portion of a first photosensitive medium both light from the first representation of the object and coherent reference light, whereby a first hologram is recorded on the photosensitive medium; and interfering on a second portion of the first photosensitive medium both light from the second representation of the object and coherent reference light, whereby a second hologram is recorded on the photosensitive medium; and interfering on a second photosensitive medium both coherent reference light and real images reconstructed from the holograms recorded on the first photosensitive medium, the real images being centered on the second photosensitive medium.
Claim 10
Independent Claim
163 words
A method for forming an image hologram that can be illuminated to form an optical image of an object comprising the steps of: calculating two-dimensional projections of how the object would appear from at least two different angles of view and plotting said projections on a display medium to form at least a first representation and a second representation of the object; interfering on a first portion of a first photosensitive medium both light from the first representation of the object and coherent reference light, whereby a first hologram is recorded on the photosensitive medium; and interfering on a second portion of the first photosensitive medium both light from the second representation of the object and coherent reference light, whereby a second hologram is recorded on the photosensitive medium; and interfering on a second photosensitive medium both coherent reference light and real images reconstructed from the holograms recorded on the first photosensitive medium, the real images being centered on the second photosensitive medium.
Claim 11
Independent Claim
86 words
A method of producing a composite hologram, comprising forming a plurality of two-dimensional images of an object from different points on a single line in a plane, sequentially projecting said images on substantially the same areas of an image screen with coherent radiation, and holographically recording each of said projected two dimensional images from said screen on separate areas of a recording medium as a plurality of horizontally aligned juxtaposed individual holograms in relative posItions corresponding to the positions from which said two-dimensional images were formed.
Claim 12
Independent Claim
86 words
A method of producing a composite hologram, comprising forming a plurality of two-dimensional images of an object from different points on a single line in a plane, sequentially projecting said images on substantially the same areas of an image screen with coherent radiation, and holographically recording each of said projected two dimensional images from said screen on separate areas of a recording medium as a plurality of horizontally aligned juxtaposed individual holograms in relative posItions corresponding to the positions from which said two-dimensional images were formed.
Claim 13
Independent Claim
88 words
A method of producing a composite hologram comprising forming a plurality of two-dimensional images of an object corresponding to different views of such object at different points along a line, sequentially projecting said images on substantially the same areas of an image screen with coherent radiation, and holographically recording each of said projected two-dimensional images from said screen on separate areas of a recording medium as a plurality of horizontally aligned juxtaposed individual holograms in relative positions corresponding to the positions from which said two-dimensional images are formed.
Claim 14
Independent Claim
88 words
A method of producing a composite hologram comprising forming a plurality of two-dimensional images of an object corresponding to different views of such object at different points along a line, sequentially projecting said images on substantially the same areas of an image screen with coherent radiation, and holographically recording each of said projected two-dimensional images from said screen on separate areas of a recording medium as a plurality of horizontally aligned juxtaposed individual holograms in relative positions corresponding to the positions from which said two-dimensional images are formed.
References Cited (Backward Citations)
US3501230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |