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US4965020A
Expired / Lapsed
US
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Non-linear optical device
Assignee: Imperial Chemical Industries Ltd
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Filing: 1987-02-04
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Granted: 1990-10-23
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Expires: 2007-02-04
Abstract
Abstract Optical elements comprising a non-centrosymmetric compound comprising an electron donor and an electron acceptor linked by a conjugated bridging group, in which the electron acceptor is a nitroso group, in which element the molecules of the compound are aligned so that the element has a net non-centrosymmetry, a method for their preparation, optical devices comprising such elements, and some of the compounds.
Inventors
- 👤 Simon Allen
- 👤 Paul F. Gordon
- 👤 John O. Morley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:50
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/35; G02F1/355; G02F1/361; G02F1/3613; G02F1/3611; G02F1/3612
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
120 words
In a nonlinear optical device comprising an optical element which is capable of exhibiting second-order non-linear optical effects, said element comprising a compound of the formula: D--B--N═O I in which B is selected from phenylene, naphthylene and biphenylene; and D is an electron donor of the formula --(L).sub.1 --(D').sub.m II wherein L is a benzene or naphthalene nucleus or conjugated alkylene or alkapolyene chain; D' is selected from methoxy, methylthio, phenylthio, dimethylaminophenylthio, methylamino, and dimethylamino; 1 is 0 or 1; and m is 1, 2 or 3, said element comprising at least two monolayers of the compound of Formula I in each of which monolayers the molecules of the compound are aligned so that the element has a net non-centrosymmetry.
Claim 2
Dependent Claim
120 words
In a nonlinear optical device comprising an optical element which is capable of exhibiting second-order non-linear optical effects, said element comprising a compound of the formula: D--B--N═O I in which B is selected from phenylene, naphthylene and biphenylene; and D is an electron donor of the formula --(L).sub.1 --(D').sub.m II wherein L is a benzene or naphthalene nucleus or conjugated alkylene or alkapolyene chain; D' is selected from methoxy, methylthio, phenylthio, dimethylaminophenylthio, methylamino, and dimethylamino; 1 is 0 or 1; and m is 1, 2 or 3, said element comprising at least two monolayers of the compound of Formula I in each of which monolayers the molecules of the compound are aligned so that the element has a net non-centrosymmetry.
Claim 3
Dependent Claim
39 words
An optical device according to claim 1 wherein all the molecules of the compound of Formula I are aligned such that the vectors along the axis of polarisation in the molecules are substantially parallel and in the same sense.
Claim 4
Dependent Claim
17 words
In a nonlinear optical device according to claim 1 wherein said optical element comprises the compound 1-nitroso-4-(4-dimethylaminophenylthio)benzene.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-10-22 | 1994-04-23 | 1994-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-22 | 1998-04-23 | 1998-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-22 | 2002-04-23 | 2002-10-23 | $7700.00 | Window Closed / Lapsed |