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公开(公告)号：JPH10104455A
公开(公告)日：1998-04-24
申请号：JP25793396
申请日：1996-09-30
Applicant: TORAY INDUSTRIES
Inventor： MAEDA HIRONOBU , TANEICHI SEISHIRO , KOBAYASHI HISAAKI
Abstract: PROBLEM TO BE SOLVED: To provide a high-band plastic optical fiber which is high in a transmission band and is lowered in bending less. SOLUTION: This high-band plastic optical fiber is a plastic optical fiber consisting of a core which is a substantially org. polymer, a first clad and a second clad. The relation of the refractive index between the core and the first clad of the plastic optical fiber described above satisfies the relation of the following formula (I) and the relation of the refractive index between the core and the second clad satisfies the formula (II). In addition, both of the first clad and the second clad consist of a polymer or polymer mixture contg. a vinylidene fluoride unit: The formula I; 0.25 -n1clad ) -n2clad )1/2>=0.45. In the formulas, ncore denotes the refractive index of the core, n1clad denotes the refractive index of the first clad and n2clad denotes the refractive index of the second clad.
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公开(公告)号：JPH09222526A
公开(公告)日：1997-08-26
申请号：JP31838496
申请日：1996-11-29
Applicant: TORAY INDUSTRIES
Inventor： YAMAMOTO TETSUYA , TANEICHI SEISHIRO , KOBAYASHI HISAAKI
Abstract: PROBLEM TO BE SOLVED: To provide a wide-band PCF(plastic clad optical fiber) which is a plastic clad optical fiber provided with a core consisting of quartz and clads consisting of polymers disposed in tight contact with the outer periphery of this core, is made wider in the band, suppresses the disadvantages (connection loss by a simple crimping connector, bending loss and further the degradation in the light transmission loss according to a temp. change) increasing accordingly and is adequate for an ATMA-LAN and high-speed Ethernet. SOLUTION: The clads have the two-layered structures consisting of the different polymers. The refractive index (nc0 ) of the core, the refractive index (nc L1 ) of the first clad disposed in tight contact with the outer periphery of the core and the refractive index (nc L2 ) of the second clad disposed in tight contact with the outer periphery of the first clad simultaneously satisfy 0.21 -nc L1 )
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公开(公告)号：JPH0980260A
公开(公告)日：1997-03-28
申请号：JP23852895
申请日：1995-09-18
Applicant: TORAY INDUSTRIES
Inventor： TERASAKA HIROYUKI , ONO MICHIO , TANEICHI SEISHIRO
IPC: G02B6/36
Abstract: PROBLEM TO BE SOLVED: To provide the optical connector and its manufacture which enable the press contact force of an optical fiber to a connector main body to be set to a proper force and the transmission loss increase and drawing bearing force of the optical fiber to be set to proper ones. SOLUTION: Of the optical connector 30 constituted by fixing a connector which has a ferrule 1 supporting a tip part of an optical fiber 5 to a tip part of an optical cord 31 formed by coating the outer peripheral surface of the optical fiber 5 concentrically with a jacket material 6 and a sheath material 8 in this order, the tip part of the optical cord 31 is exposed by specific length in the order of the optical fiber 5 and jacket material 6; and a press contact ring 3 which fixes the optical fiber 5 with its tip part and the tip of the jacket material with the rear end part is provided at the boundary part between the exposed optical fiber 5 and jacket material 6.
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公开(公告)号：JP2507355B2
公开(公告)日：1996-06-12
申请号：JP23529686
申请日：1986-10-02
Applicant: TORAY INDUSTRIES
Inventor： KOBAYASHI HISAAKI , SUGANUMA HEIROKU , TANEICHI SEISHIRO
IPC: C08F20/14 , C08F22/00 , C08F22/36 , C08F22/40 , C08F212/00 , C08F212/08 , C08F220/10 , G02B6/00 , G02B6/44
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公开(公告)号：JPH01221703A
公开(公告)日：1989-09-05
申请号：JP4814688
申请日：1988-02-29
Applicant: TORAY INDUSTRIES
Inventor： TANEICHI SEISHIRO , YAMAGUCHI SHIN , HOKARI NAOTO
Abstract: PURPOSE:To eliminate the necessity of lowering the temperature of a heating body so as to reduce the processing time of end face formation of an optical fiber by additionally providing a mold releasing plate. CONSTITUTION:The lower surface of a mold releasing plate 3, against the upper surface of which the end face of an optical fiber 1 is pressed, is pressed against the surface 8 of a heating body 6 which is previously heated to the thermoforming temperature of plastic optical fibers. The end face of the optical fiber 1 is deformed by the heat of the heating body 6 transmitted through the mold releasing plate 3 and, at the same time, the plate 3 moves in the axial direction of a cylindrical body 4 because of the force of a spring 4. When the extruding quantity of the optical fiber 1 from the bottom of the cylindrical body 2 becomes zero, the upper surface of the releasing plate 3 is brought into contact with the bottom of the cylindrical body 2. Therefore, the end face of the optical fiber can be formed easily and quickly without lowering its optical characteristic.
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Patent Agency Ranking
公开(公告)号：JPS63175805A
公开(公告)日：1988-07-20
申请号：JP605587
申请日：1987-01-16
Applicant: TORAY INDUSTRIES
Inventor： TANEICHI SEISHIRO , TAZAWA HISASHI , NIIMURA YOSHIRO
Abstract: PURPOSE:To permit economical production of a low-loss plastic optical fiber by subjecting a monomer to be formed to a core component polymer to ultrafilter refining by using an ultrafilter membrane consisting of a specific polymer. CONSTITUTION:The monomer to be formed to the core component polymer is subjected to ultrafilter refining by using the ultrafilter membrane consisting of the polymer expressed by the formula. Any polymers which have >=50wt.% methyl methacrylate unit are usable for the core component polymer and a copolymer with methyl methacrylate in addition to a polymer consisting of the methyl methacrylate alone are also possible. Such copolymers are exemplified by a copolymer of methyl methacrylate and styrene, copolymer of methyl methacrylate and methacrylate such as bornyl methacrylate except methyl methacrylate. The filtration performance of the ultrafilter membrane consisting of the polymer expressed by the formula is preferably
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公开(公告)号：JPS6395402A
公开(公告)日：1988-04-26
申请号：JP24127786
申请日：1986-10-13
Applicant: TORAY INDUSTRIES
Inventor： TANEICHI SEISHIRO , TAZAWA HISASHI
Abstract: PURPOSE:To provide the titled fiber which has excellent light transmission performance at a near UV region wavelength and is less deteriorated in the light transmission performance even if rays of a near UV region wavelength are continuously transmitted and used by regulating the contents of the remaining methyl methacrylate and methyl methacrylate dimer to be incorporated into a core component polymer. CONSTITUTION:The remaining methyl methacrylate and the dimer of the methyl methacrylate incorporated in the core component polymer of this core and cladding type plastic optical fiber composed of the core and cladding satisfy formula I and the content of the remaining methyl methacrylate incorporated in the core component polymer is
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公开(公告)号：JPS6394203A
公开(公告)日：1988-04-25
申请号：JP24035586
申请日：1986-10-09
Applicant: TORAY INDUSTRIES
Inventor： TANEICHI SEISHIRO , TAZAWA HISASHI
Abstract: PURPOSE:To improve the durability of light transmissive performance for rays of wavelength in a near UV region by decreasing the light transmission loss of rays of 400nm wavelength to =80wt% polymethy methacrylate unit and a cladding component is formed of the polymer having the refractive index smaller by >=25% than the refractive index of the core component polymer. The light transmission loss of rays of 400nm wavelength is decreased to
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公开(公告)号：JPH10221543A
公开(公告)日：1998-08-21
申请号：JP2818097
申请日：1997-02-12
Applicant: TORAY INDUSTRIES
Inventor： MAEDA HIRONOBU , TANEICHI SEISHIRO , KOBAYASHI HISAAKI
IPC: G02B6/00 , C08F214/22 , C08F214/28 , C08F220/14 , G02B6/036 , G02B6/22
Abstract: PROBLEM TO BE SOLVED: To provide a broadband plastic optical fiber which has higher transmission band, has good characteristic such as bending loss, and is adequate for a signal transmission line such as intermediate or high speed LAN. SOLUTION: A plastic optical fiber consists of a core, a first clad, and a second clad, and the core is made of organic polymer. Refraction indexes of the core, the first clad and the second clad (respectively, ncore , n1-clad , and n2-clad ) simultaneously satisfy the equations; 0.25 -n1-clad ) -n2-clad ) >=0.45, the first clad is made of metacrylate copolymer which contains as monomer component 10-40mol% of at least one kind of fluoroalkyl- metacrylate represented by the following formula (where, n is integer of 1-5, and X is hydrogen atom or fluorine atom), and 60-90mol% of methyl- metacrylate, and the second clad is made of (co)polymer containing vinyliden fluoride unit.
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公开(公告)号：JPH09258028A
公开(公告)日：1997-10-03
申请号：JP7061896
申请日：1996-03-26
Applicant: TORAY INDUSTRIES
Inventor： MAEDA HIRONOBU , TANEICHI SEISHIRO , YAMAGUCHI SHIN
Abstract: PROBLEM TO BE SOLVED: To provide an optical fiber having free flexibility to allow bending in arbitrary directions while having an excellent side light leaking property and having excellent handling and installation characteristics by forming the sectional shape of a core into a non-circular shape and the sectional shape of a clad into a complete round shape. SOLUTION: Both of the core 1 and clad 2 of the optical fiber are formed of a transparent resin and a resin having the refractive index larger than the refractive index of the clad 2 is used for the core 1. While the sectional shape of the core 1 is non-circular, the cross sectional shape of the clad 2 is formed into the complete round shape. Namely, the each core 1 has a triangular section (Fig. A), square section (Fig. B), hexagonal shape (Fig. C) or star-shaped section (Fig. D) and all of the sectional shape of the clad 2 are completely round. As a result, the optical fiber may be formed as a wire-shaped light emitter by allowing light to leak laterally. Since the bending rigidity is made uniform in arbitrary directions, the handling and installation characteristics are improved.
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