Patent US4883338A successfully refreshed from Google Patents.
US4883338A
Expired / Lapsed
US
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Synthetic resin optical fiber
Assignee: Hitachi Cable Ltd
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Filing: 1988-10-14
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Granted: 1989-11-28
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Expires: 2008-10-14
Abstract
Abstract A synthetic resin optical fiber having the structure simplified and a stable light transmission characteristic is disclosed. The synthetic resin optical fiber comprises a transparent core and a cladding formed around the core, and the cladding has an inner transparent portion and an outer peripheral portion containing a light interruption substance such as a pigment and the like.
Inventors
- 👤 Tomiya Abe
- 👤 Yukio Shimazaki
- 👤 Takanobu Ishibashi
- 👤 Norimoto Abe
- 👤 Takayasu Asai
- 👤 Noriaki Taketani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:40
CPC Classifications
G; G02; G02B; G02B6/00; G02B6/02; G02B6/02033
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
127 words
A synthetic resin optical fiber comprising: a core of a transparent synthetic resin for the transmission of light and having a first predetermined refractive index; and a cladding formed around the core and having a second predetermined refractive index lower than said first predetermined refractive index, said cladding layer containing 0.03 to 5 weight % of a light interruption substance such as a pigment or the like in a region of said cladding layer equal to or greater than half a wavelength of transmission light from the interface between said core and said cladding layer, said cladding layer including a region less than half a wavelength of transmission light from the interface between said core and cladding layer that is substantially free of the light interruption substance.
Claim 2
Dependent Claim
127 words
A synthetic resin optical fiber comprising: a core of a transparent synthetic resin for the transmission of light and having a first predetermined refractive index; and a cladding formed around the core and having a second predetermined refractive index lower than said first predetermined refractive index, said cladding layer containing 0.03 to 5 weight % of a light interruption substance such as a pigment or the like in a region of said cladding layer equal to or greater than half a wavelength of transmission light from the interface between said core and said cladding layer, said cladding layer including a region less than half a wavelength of transmission light from the interface between said core and cladding layer that is substantially free of the light interruption substance.
Claim 3
Dependent Claim
33 words
A synthetic resin optical fiber according to claim 1, wherein said light interruption substance is at least one selected from carbon black, graphite, a metal oxide, a metal sulfide, and an organic pigment.
Claim 4
Dependent Claim
25 words
A synthetic resin optical fiber according to claim 1, wherein said cladding layer contains 0.05 to 1% by weight of said light interruption substance therein.
Claim 5
Dependent Claim
41 words
A synthetic resin optical fiber according to claim 1, wherein said cladding layer is of a resin selected from hexafluoroethylene-tetrafluoropropylene copolymer, ethylene-tetrafluoroethylene copolymer, vinylidene fluoride polymer, vinylidene fluoride-tetrafluoroethylene polymer, tetrafluoroethylene-perfluou-alkylvinylether copolymer, chlorotrifluoroethylene polymer, vinyl acetateethylene copolymer, tetramethyl-1-pentene polymer, and methylmethacrylate polymer.
Claim 6
Dependent Claim
117 words
A synthetic resin optical fiber comprising: a core of a transparent synthetic resin for the transmission of light and having a first predetermined refractive index; and a cladding layer formed around said core and having a second refractive index lower than first predetermined refractive index, said cladding layer containing 0.03 to 5 weight % of a light interruption substance such as a pigment or the like in a region of said cladding layer equal to or greater than 1 μm from the interface between said core and said cladding layer, said cladding layerincluding a region less than 1 μm from the interface between said core and cladding layer that is substantially free of the light interruption substance.
Claim 7
Dependent Claim
117 words
A synthetic resin optical fiber comprising: a core of a transparent synthetic resin for the transmission of light and having a first predetermined refractive index; and a cladding layer formed around said core and having a second refractive index lower than first predetermined refractive index, said cladding layer containing 0.03 to 5 weight % of a light interruption substance such as a pigment or the like in a region of said cladding layer equal to or greater than 1 μm from the interface between said core and said cladding layer, said cladding layerincluding a region less than 1 μm from the interface between said core and cladding layer that is substantially free of the light interruption substance.
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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) | 1992-11-27 | 1993-05-29 | 1993-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-27 | 1997-05-29 | 1997-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-27 | 2001-05-29 | 2001-11-28 | $7700.00 | Window Closed / Lapsed |