US4799739A
Expired / Lapsed
US
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Real time autostereoscopic displays using holographic diffusers
Assignee: Illinois Tool Works Inc
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Filing: 1987-08-10
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Granted: 1989-01-24
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Expires: 2007-08-10
Abstract
Abstract Methods and apparatus for providing real time autostereoscopic displays using holographic diffusers are disclosed. In accordance with the method, a diffuse holographic optical element is fabricated whereby an image projected onto the diffused holographic optical element will be viewable only over a limited horizontal extent of less than the separation of a typical viewer's eyes. Then the holographic optical element is used as a projection screen for a plurality of projectors spatially positioned with respect to each other so that the horizontal position within which the image of each projector is viewable is substantially contiguous with the horizontal position of viewability of the respective adjacent projector whereby the autostereoscopic effect is achieved. Various embodiments, including the transmission mode and reflection mode holographic optical elements, are disclosed.
Inventors
- 👤 Craig Newswanger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:13
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/32; G02B30/00; G02B30/20; G02B30/26; G03; G03H; G03H1/00; G03H1/22; G03H1/2249; G03H2001/2263; G03H2001/2265
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
89 words
An autostereoscopic display comprising a holographic diffuser means for directing light incident thereto from a point source toward and substantially only toward a viewing zone in a diffuse pattern, and means for projecting a plurality of images onto said holographic diffuser means so as to overlie each other on said holographic diffuser means, each image being projected from a somewhat different direction selected so that the viewing zones of said plurality of images are each substantially contiguous to the viewing zones of adjacent images along the adjacent edges thereof.
Claim 2
Dependent Claim
89 words
An autostereoscopic display comprising a holographic diffuser means for directing light incident thereto from a point source toward and substantially only toward a viewing zone in a diffuse pattern, and means for projecting a plurality of images onto said holographic diffuser means so as to overlie each other on said holographic diffuser means, each image being projected from a somewhat different direction selected so that the viewing zones of said plurality of images are each substantially contiguous to the viewing zones of adjacent images along the adjacent edges thereof.
Claim 3
Dependent Claim
20 words
The autostereoscopic display of claim 1 wherein said plurality of images are sequentially different perspective images of the same subject.
Claim 4
Dependent Claim
38 words
The autostereoscopic display of claim 2 wherein said means for projecting a plurality of images onto said holographic diffuser means is also a means for frequent updating of said images, whereby a real time autostereoscopic display is obtained.
Claim 5
Dependent Claim
17 words
The autostereoscopic display of claim 1 wherein said holographic diffuser means is a transmission mode holographic diffuser.
Claim 6
Dependent Claim
17 words
The autostereoscopic display of claim 1 where said holographic diffuser means is a reflection mode holographic diffuser.
Claim 7
Dependent Claim
26 words
The autostereoscopic display of claim 1 wherein said means for projecting a plurality of images onto said holographic diffuser means comprises a movie film projection means.
Claim 8
Dependent Claim
27 words
The autostereoscopic display of claim 1 wherein said means for projecting a plurality of images onto said holographic diffuser means comprises a cathode ray tube display means.
Claim 9
Dependent Claim
30 words
The autostereoscopic display of claim 1 wherein said means for projecting a plurality of images onto said holographic diffuser means comprises a light source means and liquid crystal mask means.
Claim 10
Dependent Claim
17 words
The autostereoscopic display of claim 1 wherein the plurality of images is three or more in number.
Claim 11
Dependent Claim
141 words
A real time autostereoscopic display comprising a holographic diffuser means for directing light incident thereto from a point source toward and substantially only toward a viewing zone in a diffuse pattern, and projecting means for projecting a plurality of three or more images of different perspectives of the same scene onto said holographic diffuser means so as to overlie each other on said holographic diffuser means, each image being projected from a respective somewhat different direction selected so that the viewing zones of said plurality of images are each substantially contiguous in side-by-side relation to the viewing zones of adjacent images, said projection means also being a means for repetitively updating each said image, said viewing zones being sufficiently narrow so that a person viewing the same from the position of the viewing zones will see different images with each eye.
Claim 12
Dependent Claim
141 words
A real time autostereoscopic display comprising a holographic diffuser means for directing light incident thereto from a point source toward and substantially only toward a viewing zone in a diffuse pattern, and projecting means for projecting a plurality of three or more images of different perspectives of the same scene onto said holographic diffuser means so as to overlie each other on said holographic diffuser means, each image being projected from a respective somewhat different direction selected so that the viewing zones of said plurality of images are each substantially contiguous in side-by-side relation to the viewing zones of adjacent images, said projection means also being a means for repetitively updating each said image, said viewing zones being sufficiently narrow so that a person viewing the same from the position of the viewing zones will see different images with each eye.
Claim 13
Dependent Claim
19 words
The real time autostereoscopic display of claim 10 wherein said holographic diffuser means is a transmission mode holographic diffuser.
Claim 14
Dependent Claim
19 words
The real time autostereoscopic display of claim 10 where said holographic diffuser means is a reflection mode holographic diffuser.
Claim 15
Dependent Claim
28 words
The real time autostereoscopic display of claim 10 wherein said means for projecting a plurality of images onto said holographic diffuser means comprises a movie film projection means.
Claim 16
Dependent Claim
29 words
The real time autostereoscopic display of claim 10 wherein said means for projecting a plurality of images onto said holographic diffuser means comprises a cathode ray tube display means.
Claim 17
Dependent Claim
32 words
The real time autostereoscopic display of claim 10 wherein said means for projecting a plurality of images onto said holographic diffuser means comprises a light source means and liquid crystal mask means.
Claim 18
Independent Claim
117 words
A method of creating an autostereoscope display comprising the steps of (a) forming a holographic diffuser for directing light incident thereto from a point source toward and substantially only toward a viewing zone in a diffuse pattern, and (b) projecting more than two images of different perspectives of the same scene onto the holographic diffuser, each from a respective somewhat different direction selected so that the viewing zones of the more than two images are each substantially contiguous in side-by-side relation to the viewing zones of adjacent images and with the viewing zones being sufficiently narrow so that a person viewing the same from the position of the viewing zones will see different images with each eye.
Claim 19
Independent Claim
117 words
A method of creating an autostereoscope display comprising the steps of (a) forming a holographic diffuser for directing light incident thereto from a point source toward and substantially only toward a viewing zone in a diffuse pattern, and (b) projecting more than two images of different perspectives of the same scene onto the holographic diffuser, each from a respective somewhat different direction selected so that the viewing zones of the more than two images are each substantially contiguous in side-by-side relation to the viewing zones of adjacent images and with the viewing zones being sufficiently narrow so that a person viewing the same from the position of the viewing zones will see different images with each eye.
Claim 20
Dependent Claim
25 words
The method of claim 16 comprising the additional step of repetitively updating each of the images so as to create a real time autostereoscopic display.
References Cited (Backward Citations)
US4500163A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-01-24 | 1992-07-25 | 1993-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-01-24 | 1996-07-25 | 1997-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-01-24 | 2000-07-25 | 2001-01-24 | $7700.00 | Window Closed / Lapsed |