US3847696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making light conducting plates
Assignee: Siemens AG
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Filing: 1971-07-15
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Granted: 1974-11-12
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Expires: 1991-07-15
Abstract
Abstract A process for producing light-conducting plates which are particularly capable of use at the inlet of gamma cameras, is characterized by the use of transparent rods which are placed one next to the other, while means constituting distance holders which are thicker than the length of the light wave to be transmitted, are placed between the rods. At least one end of the rods is fixed by a casing mass, then it is ground and polished, and then the casting mass as well as the grinding and polishing means are removed.
Inventors
- 👤 L Ortner
- 👤 K Heinzelmann
- 👤 B Conrad
- 👤 J Dierker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:13
CPC Classifications
G; G21; G21K; G21K1/00; G21K1/02; G21K1/025; G01; G01T; G01T1/00; G01T1/16; G01T1/161; G01T1/164; G01T1/1641; G01T1/1645; H; H01; H01J; H01J29/00; H01J29/02; H01J29/10; H01J29/36; H01J29/38; H01J29/86; H01J29/89; H01J29/892
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
142 words
A process for making light-conducting plates particularly suitable for use in inlets of gamma cameras, said process comprising placing next to each other a plurality of transparent rods and locating between said rods distance holders consisting of wires of deformable material having a thickness greater than the length of the light wave to be transmitted, pressing together said rods and said wires, fixing by a casting mass at least one end of each of said rods, grinding and polishing said ends, removing said casting mass and the grinding and polishing means, then applying a foil to at least one front surface of the produced light-conducting plate, said foil having a thickness of 20 to 100 Mu and filling spaces remaining between said rods with particles of a granulate, said particles having a large diameter relatively to the length of said light wave.
Claim 2
Dependent Claim
142 words
A process for making light-conducting plates particularly suitable for use in inlets of gamma cameras, said process comprising placing next to each other a plurality of transparent rods and locating between said rods distance holders consisting of wires of deformable material having a thickness greater than the length of the light wave to be transmitted, pressing together said rods and said wires, fixing by a casting mass at least one end of each of said rods, grinding and polishing said ends, removing said casting mass and the grinding and polishing means, then applying a foil to at least one front surface of the produced light-conducting plate, said foil having a thickness of 20 to 100 Mu and filling spaces remaining between said rods with particles of a granulate, said particles having a large diameter relatively to the length of said light wave.
Claim 3
Dependent Claim
51 words
A process in accordance with claim 1, wherein said rods consist of glass, have a round cross-section and a thickness ranging from 1 to 15 mm., preferably 7 mm., and wherein said wires consisting of a deformable metal, such as copper, and having a diameter ranging between 0.2 to 0.5 mm.
Claim 4
Dependent Claim
40 words
A process in accordance with claim 1, wherein said foil iS applied at the light entry side of the light-conducting plate, the process comprising the further step of blackening said foil at parts located opposite the spaces between said rods.
Claim 5
Dependent Claim
29 words
A process in accordance with claim 1, further comprising gluing said ground and polished ends of the rods to a solid transparent plate and then removing said distance holders.
Claim 6
Dependent Claim
13 words
A light-conducting plate made in accordance with the process described in claim 1.
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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |