US4386414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data processing system utilizing a holographic optical element
Assignee: University of Minnesota System
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Filing: 1980-11-19
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Granted: 1983-05-31
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Expires: 2000-11-19
Abstract
Abstract The data processing system makes use of a holographic optical element comprised of a number of facets, each facet containing a grating pattern for diffractively redistributing input light so that output light from a facet or a combination of facets represents encoded mathematical data.
Inventors
- 👤 Steven K. Case
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:41
CPC Classifications
G; G02; G02B; G02B5/00; G02B5/32; G06; G06E; G06E3/00; G06E3/001
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
41 words
In a data processing system, a holographic optical element formed with a plurality of adjoining facets, each facet containing grating patterns representing encoded mathematical data for diffractively redistributing input light so that output light from each facet represents said mathematical data.
Claim 2
Dependent Claim
41 words
In a data processing system, a holographic optical element formed with a plurality of adjoining facets, each facet containing grating patterns representing encoded mathematical data for diffractively redistributing input light so that output light from each facet represents said mathematical data.
Claim 3
Dependent Claim
39 words
A data processing system in accordance with claim 1 in which said input light is in the form of a light beam and said output light is in the form of a plurality of angularly related output light beams.
Claim 4
Dependent Claim
23 words
A data processing system in accordance with claim 2 including planar means forming a plane on which said angularly related output beams impinge.
Claim 5
Dependent Claim
28 words
A data processing system in accordance with claim 3 in which said planar means includes light-sensitive means disposed in said plane which said angularly related output beams strike.
Claim 6
Dependent Claim
24 words
A data processing system in accordance with claim 4 in which said light-sensitive means comprises an array of photo-diodes for detecting the output beams.
Claim 7
Dependent Claim
29 words
A data processing system in accordance with claim 1 in which said holographic optical element constitutes a photographic film, said facets being arranged in horizontal and vertical rows thereon.
Claim 8
Dependent Claim
59 words
A data processing system in accordance with claim 6 in which each facet is sub-divided into a plurality of sub-facets having a grating representing a portion of said encoded mathematical data recorded therein, all of the sub-facets redistributing some of the input light as output light so that said output light represents the mathematical data recorded in said sub-facets.
Claim 9
Dependent Claim
38 words
A data processing system in accordance with claim 1 including means for producing said input light in the form of a plurality of light beams, and means for directing each of said light beams onto a particular facet.
Claim 10
Dependent Claim
68 words
In a data processing system, a holographic optical element formed with a plurality of adjoining facets, each facet containing grating patterns representing encoded mathematical data for diffractively redistributing input light so that output light from each facet represents said mathematical data, a light emitting diode for each of said facets, said light emitting diodes providing said input light, and a plurality of photo-diodes for detecting said output light.
Claim 11
Dependent Claim
68 words
In a data processing system, a holographic optical element formed with a plurality of adjoining facets, each facet containing grating patterns representing encoded mathematical data for diffractively redistributing input light so that output light from each facet represents said mathematical data, a light emitting diode for each of said facets, said light emitting diodes providing said input light, and a plurality of photo-diodes for detecting said output light.
Claim 12
Dependent Claim
44 words
A data processing system in accordance with claim 9 in which at least one of said facets includes a number of sub-facets, each sub-facet representing a portion of said encoded mathematical data, and said photo-diodes are positioned to receive output light from said sub-facets.
Claim 13
Dependent Claim
50 words
A data processing system in accordance with claim 10 including a lens between each light emitting diode and the facet for which the diode provides input light, and an additional lens between said holographic element and said photo-diodes for focusing output light from said sub-facets onto certain of said photo-diodes.
References Cited (Backward Citations)
US3466433A
Cited
US3581078A
Cited
US3680080A
Cited
US3996455A
Cited
US4009380A
Cited
US4074361A
Cited
US4084880A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-30 | 1986-11-29 | 1987-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-30 | 1990-11-29 | 1991-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-30 | 1994-11-29 | 1995-05-31 | $7700.00 | Window Closed / Lapsed |