US4236791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid crystal illuminator having ellipoidal light guide
Assignee: Siemens AG
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Filing: 1978-05-25
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Granted: 1980-12-02
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Expires: 1998-05-25
Abstract
Abstract The invention relates to an optical element in the form of a body (fluorescent body) which comprises a material with an index of refraction greater than one, contains fluorescent particles, and manifests at least one output coupling zone (light outlet window). This element is characterized, in accordance with the invention, by its use for collecting, conducting, and focused output coupling of optical radiation. The fluorescent body primarily serves the purpose of collecting natural or artificially produced radiation in large areas, and to focus it on a small-area, relatively weak receiver; or, with and without a light valve, for the purpose of representation of information (or data).
Inventors
- 👤 Hans Krueger
- 👤 Werner Glaubitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:51
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/13; G02F1/133; G02F1/1333; G02F1/1335; G02F1/1336; G02F1/133614
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
An optical element comprising a fluorescent body system which is made of a material having an index of refraction of greater than one, has the form of a hollow ellipsoid of revolution, contains fluorescent particles and possesses at least one output coupling zone, said body system having at least two integral fluorescent body portions with one of the body portions having the output coupling zone, the remaining body portions being offset from the one body portion and being interconnected thereto by a smooth curved surface, said remaining body portions being operable for the interception of incident radiation remote from said coupling zone and for the guidance of resultant optical radiation to said output coupling zone.
Claim 2
Dependent Claim
115 words
An optical element comprising a fluorescent body system which is made of a material having an index of refraction of greater than one, has the form of a hollow ellipsoid of revolution, contains fluorescent particles and possesses at least one output coupling zone, said body system having at least two integral fluorescent body portions with one of the body portions having the output coupling zone, the remaining body portions being offset from the one body portion and being interconnected thereto by a smooth curved surface, said remaining body portions being operable for the interception of incident radiation remote from said coupling zone and for the guidance of resultant optical radiation to said output coupling zone.
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) | 1983-12-02 | 1984-06-02 | 1984-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-02 | 1988-06-02 | 1988-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-02 | 1992-06-02 | 1992-12-02 | $7700.00 | Window Closed / Lapsed |