US4927220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System and method for photorefractive holographic recording and signal processing
Assignee: MICROELECTRONIC & COMPUTER TECHNOLOGY Corp (MCC) A CORP OF
•
Filing: 1987-12-31
•
Granted: 1990-05-22
•
Expires: 2007-12-31
Abstract
Abstract A photorefractive crystallyte array for image recording and signal processing is disclosed. The photorefractive crystallytes are configured as a two-dimensional array of selected position and spacing designed, for example, to coincide with the spatial frequency components of an associated optical image, such as a Fourier transform image, and to permit optical signal processing.
Inventors
- 👤 Lambertus Hesselink
- 👤 Steve R. Redfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:31
CPC Classifications
G; G03; G03H; G03H1/00; G03H1/02; G03H1/024; G03H1/0248; G02; G02F; G02F1/00; G02F1/01; G02F1/03; G02F1/05; G02F1/0541; G03H1/26; G06; G06E; G06E3/00; G06E3/001; G06E3/005; G11; G11C; G11C13/00; G11C13/04; G11C13/042; G11C13/044; G11C13/046; G03H1/0005; G03H2001/0066; G03H2001/026; G03H2260/00; G03H2260/30; G03H2260/50; G03H2260/54
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
29 words
In an optical recording system, the improvement comprising at least two photorefractive crystallytes, wherein said crystallytes are capable of being selectively addressed for optical holographic recording, storage and reconstruction.
Claim 2
Dependent Claim
29 words
In an optical recording system, the improvement comprising at least two photorefractive crystallytes, wherein said crystallytes are capable of being selectively addressed for optical holographic recording, storage and reconstruction.
Claim 3
Dependent Claim
25 words
The system of claim 1, further comprising means for forming a hologram image at said crystallytes for storage therein; and means for reconstructing said hologram.
Claim 4
Dependent Claim
38 words
The system of claim 2, further comprising means for applying voltages selectively to said photorefractive crystallytes to selectively control at least one of optical recording and reconstruction of the spatial frequency components of holograms associated with individual crystallytes.
Claim 5
Dependent Claim
28 words
The system of claim 1, wherein said crystallytes are positioned in a geometric array corresponding to the spatial frequency components of an associated Fourier transform of an image.
Claim 6
Dependent Claim
20 words
The system of claim 1, further comprising means mounting said photorefractive crystallytes at selective spaced positions in a two-dimensional array.
Claim 7
Dependent Claim
20 words
The system of claim 1, further comprising means mounting said photorefractive crystallytes at selective spaced positions in a three-dimensional array.
Claim 8
Dependent Claim
20 words
The system of claim 1, further comprising means mounting said photorefractive crystallytes at selective spaced positions in a rectangular array.
Claim 9
Dependent Claim
10 words
The system of claim 1, wherein said crystallytes are cubits.
Claim 10
Dependent Claim
10 words
The system of claim 1, wherein said crystallytes are fibers.
Claim 11
Dependent Claim
21 words
The system of claim 1, further comprising means for selectively controlling the temperature of said individual crystallytes to provide thermal fixing.
Claim 12
Dependent Claim
15 words
The system of claim 1, wherein the photorefractive crystallytes are arranged in a two-dimensional array.
Claim 13
Dependent Claim
15 words
The system of claim 1, wherein the photorefractive crystallytes are arranged in a row-by-column array.
Claim 14
Dependent Claim
26 words
In a signal processing system, the improvement comprising at least two photorefractive crystallytes, wherein said crystallytes are capable of being selectively addressed for optical signal processing.
Claim 15
Dependent Claim
26 words
In a signal processing system, the improvement comprising at least two photorefractive crystallytes, wherein said crystallytes are capable of being selectively addressed for optical signal processing.
Claim 16
Dependent Claim
25 words
The system of claim 13, further comprising means for forming a hologram image at said crystallytes for storage therein; and means for reconstructing said hologram.
Claim 17
Dependent Claim
38 words
The system of claim 14, further comprising means for applying voltages selectively to said photorefractive crystallytes to selectively control at least one of optical recording and reconstruction of the spatial frequency components of holograms associated with individual crystallytes.
Claim 18
Dependent Claim
30 words
The system of claim 13, wherein said crystallytes are positioned in a geometric array corresponding to at least certain spatial frequency components of an associated Fourier transform of an image.
Claim 19
Dependent Claim
20 words
The system of claim 13, further comprising means mounting said photorefractive crystallytes at selective spaced positions in a two-dimensional array.
Claim 20
Dependent Claim
20 words
The system of claim 13, further comprising means mounting said photorefractive crystallytes at selective spaced positions in a three-dimensional array.
Claim 21
Dependent Claim
20 words
The system of claim 13, further comprising means mounting said photorefractive crystallytes at selective spaced positions in a rectangular array.
Claim 22
Dependent Claim
10 words
The system of claim 13, wherein said crystallytes are cubits.
Claim 23
Dependent Claim
10 words
The system of claim 13, wherein said crystallytes are fibers.
Claim 24
Dependent Claim
21 words
The system of claim 13, further comprising means for selectively controlling the temperature of said individual crystallytes to provide thermal fixing.
Claim 25
Dependent Claim
15 words
The system of claim 13, wherein the photorefractive crystallytes are arranged in a two-dimensional array.
Claim 26
Dependent Claim
15 words
The system of claim 13, wherein the photorefractive crystallytes are arranged in a row-by-column array.
Claim 27
Dependent Claim
25 words
An optical array comprising at least two photorefractive crystallytes capable of being selectively addressed for at least one of optical signal processing or halographic recording.
Claim 28
Dependent Claim
25 words
An optical array comprising at least two photorefractive crystallytes capable of being selectively addressed for at least one of optical signal processing or halographic recording.
Claim 29
Independent Claim
44 words
A method for selectively processing an optical signal, comprising providing at least a plurality of photorefractive elements for recording at least certain spatial frequency components of an associated optical image; and selectively activating said elements to enhance or diminish said associated spatial frequency components.
Claim 30
Independent Claim
44 words
A method for selectively processing an optical signal, comprising providing at least a plurality of photorefractive elements for recording at least certain spatial frequency components of an associated optical image; and selectively activating said elements to enhance or diminish said associated spatial frequency components.
References Cited (Backward Citations)
US3454414A
Cited
US3652145A
Cited
US3861784A
Cited
US4138189A
Cited
US4410240A
Cited
US4655542A
Cited
US4674824A
Cited
US4786149A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-21 | 1993-11-20 | 1994-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-21 | 1997-11-20 | 1998-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-21 | 2001-11-20 | 2002-05-22 | $7700.00 | Window Closed / Lapsed |