US4552431A
Expired / Lapsed
US
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Optical fibers with plastic core and polymer cladding
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
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Filing: 1983-09-01
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Granted: 1985-11-12
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Expires: 2003-09-01
Abstract
Abstract Described are optical fibers having a core of plastic material, such as polystyrene, and a polymer covering of vinyl acetate or a fluorine-containing derivative of vinyl acetate, and a process for producing the same by drawing a bar of the same materials.
Inventors
- 👤 Louis-Rene Allemand
- 👤 Jean Calvet
- 👤 Jean-Claude Cavan
- 👤 Jean-Claude Thevenin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:59
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/02; G02B6/02033; G02B6/02038; G01; G01T; G01T1/00; G01T1/16; G01T1/20; G01T1/203; G02B1/00; G02B1/04; G02B1/045; G02B1/046; G02B1/048
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
53 words
Plastic optical fibers comprising a core formed by a polymer of a compound having the formula: ##STR3## in which Y is hydrogen or alkyl; and a cladding consisting essentially of a polymer selected from the group consisting of at least one vinyl acetate polymer and at least one fluorinated derivative of vinyl acetate.
Claim 2
Dependent Claim
53 words
Plastic optical fibers comprising a core formed by a polymer of a compound having the formula: ##STR3## in which Y is hydrogen or alkyl; and a cladding consisting essentially of a polymer selected from the group consisting of at least one vinyl acetate polymer and at least one fluorinated derivative of vinyl acetate.
Claim 3
Dependent Claim
13 words
Optical fibers according to claim 1, wherein said fluorinated derivative is vinyl trifluoroacetate.
Claim 4
Dependent Claim
11 words
Optical fibers according to claim 1 wherein said core is polystyrene.
Claim 5
Dependent Claim
13 words
Optical fibers according to claim 1, wherein said fibers are index gradient fibers.
Claim 6
Dependent Claim
21 words
Optical fibers according to claim 1 having scintillation or fluorescence properties, wherein said core contains a scintillating or fluorescent doping agent.
Claim 7
Dependent Claim
24 words
Optical fibers according to claim 5, wherein said doping agents are selected from the group consisting of 2-(4-tert-butylphenyl)-5-(4-biphenylyl)-1,3,4-oxadiazole (butyl PBD) and 1,4-di-[2-(4-methyl-5-phenyloxazolyl)]-benzene (dimethyl POPOP).
Claim 8
Dependent Claim
31 words
Plastic optical fibers comprising a core and a cladding, said cladding consisting essentially of a polymer selected from the group consisting of vinyl acetate and a fluorinated derivative of vinyl acetate.
Claim 9
Dependent Claim
31 words
Plastic optical fibers comprising a core and a cladding, said cladding consisting essentially of a polymer selected from the group consisting of vinyl acetate and a fluorinated derivative of vinyl acetate.
Claim 10
Dependent Claim
21 words
Optical fibers according to claim 7 having scintillation or fluorescence properties, wherein said core contains a scintillating or fluorescent doping agent.
Claim 11
Dependent Claim
24 words
Optical fibers according to claim 8, wherein said doping agent is selected from the group consisting of 2-(4-tert-butylphenyl)-5-(4-biphenylyl)-1,3,4-oxadiazole (butyl PBD) and 1,4-di-[2-(4-methyl-5-phenyloxazolyl)]-benzene (dimethyl POPOP).
Claim 12
Dependent Claim
62 words
A process for the production of plastic optical fibers having a core and a cladding, comprising performing a bar of plastic core material and coating the same with a cladding material consisting essentially of a polymer selected from the group consisting of at least one vinylacetate polymer and at least one fluorinated derivative of vinylacetate, and drawing by gravity, the so-coated preform.
Claim 13
Dependent Claim
62 words
A process for the production of plastic optical fibers having a core and a cladding, comprising performing a bar of plastic core material and coating the same with a cladding material consisting essentially of a polymer selected from the group consisting of at least one vinylacetate polymer and at least one fluorinated derivative of vinylacetate, and drawing by gravity, the so-coated preform.
Claim 14
Dependent Claim
20 words
A process according to claim 10, wherein said preform is drawn during passage through an oven, without any mechanical contact.
Claim 15
Dependent Claim
35 words
A process according to claim 10, wherein the cladding material is formed by two polymers having different viscosities in order to adapt the resulting viscosity of the cladding material to that of said core material.
Claim 16
Dependent Claim
18 words
A process according to claim 10, wherein the core bar is produced by polymerization followed by heat treatment.
Claim 17
Dependent Claim
29 words
A process according to claim 13, for optical fibers having scintillation or fluorescence properties, wherein prior to polymerization, scintillating or fluorescent doping agents are incorporated into said core material.
Claim 18
Dependent Claim
12 words
A process according to claim 10, wherein said core material is polystyrene.
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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) | 1988-11-11 | 1989-05-13 | 1989-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-11 | 1993-05-13 | 1993-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-11 | 1997-05-13 | 1997-11-12 | $7700.00 | Window Closed / Lapsed |