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Patent US3904272A successfully refreshed from Google Patents.
US3904272A
Expired / Lapsed
US
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Mosaic light valve and method of fabricating same
Assignee: DKP A Corp OF
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Filing: 1973-06-01
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Granted: 1975-09-09
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Expires: 1993-06-01
Abstract
Abstract A mosaic of electro-optically active members, such as glass fibers, are assembled into a bundle and separated from each other by means of an optically opaque material which is either clad onto the respective active members or inserted as a separating structure in the assemblage. The assemblage of electro-optically active members is then heated and pressed together to fuse the assembly, which is sliced transversely into plates and polished. Optically transparent electrodes are deposited over opposite faces of each plate in registration with the respective ones of the active members making up the mosaic. An electrical potential which is applied across a respective active member changes an optical transmission property thereof, such as polarization or index of refraction, such that when the transmitted light is polarization analyzed or monitored, respectively, certain patterns in the light beam passing through the mosaic can be rendered relatively dark, in response to the application of a corresponding pattern of electrical potential.
Inventors
- 👤 Emil R Straka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:06
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/0009; G02F1/0018; G02F1/01; G02F1/03; G02F1/0305; G02F1/0316
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
87 words
In a light valve, a solid plate comprising a fused glass assemblage, said plate having two opposed faces, a mosaic of transparent electro-optically active regions interconnecting said opposed faces, and an optically opaque material separating adjacent ones of said active regions; and a plurality of optically transparent electrodes overlaying said opposed faces of said solid plate, said electrodes being formed in patterns for selectively applying an electric field across respective electro-optically active regions of said plate for electrically controlling an optical transmisson property of said respective regions.
Claim 2
Dependent Claim
87 words
In a light valve, a solid plate comprising a fused glass assemblage, said plate having two opposed faces, a mosaic of transparent electro-optically active regions interconnecting said opposed faces, and an optically opaque material separating adjacent ones of said active regions; and a plurality of optically transparent electrodes overlaying said opposed faces of said solid plate, said electrodes being formed in patterns for selectively applying an electric field across respective electro-optically active regions of said plate for electrically controlling an optical transmisson property of said respective regions.
Claim 3
Dependent Claim
44 words
The apparatus of claim 1 wherein said electro-optically active regions are made of a material in which the plane of polarization of the light transmitted therethrough is rotated in response to application of the electric field across respective active regions of said mosaic structure.
Claim 4
Dependent Claim
39 words
The apparatus of claim 2 wherein said electro-optically active members are made of a glass material containing electric polarization constituents selected from the group consisting of Tl, Pb, Bi, In, Sn, Sb, As, NaKNbO3, Pb3Nb2O9, KTaO3, BaTiO3 and PbO.
Claim 5
Dependent Claim
19 words
The apparatus of claim 3 wherein said glass material is selected from the group consisting of GeS2 and GeSe2.
Claim 6
Dependent Claim
23 words
The apparatus of claim 1 wherein said patterns of transparent electrodes include an overlaying array of radially spaced circumferentially directed concentric transparent electrodes.
Claim 7
Dependent Claim
22 words
The apparatus of claim 1 wherein said patterns of transparent electrodes include an overlaying array of circumferentially spaced radially directed transparent electrodes.
Claim 8
Dependent Claim
106 words
The apparatus of claim 1 wherein respective ones of said electro-optically active regions are surrounded by a cladding material and wherein said electro-optically active regions are made of a material in which the index of refraction changes in response to an electric field applied across the respective mosaic member, and wherein the electro-optically active regions have an optical transmission mode with an index of refraction greater than the index of refraction of said cladding material surrounding respective active regions thereby forming light pipes, and further have an optically attenuative mode with an index of refraction less than that of said cladding material surrounding respective active region.
Claim 9
Dependent Claim
27 words
The apparatus of claim 2 including, means for polarizing the light incident on said mosaic, and means for polarization analysis of the light passing through said mosaic.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |