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81. 发明专利

JPS61198103A METHOD FOR TESTING SCREENING FOR OPTICAL FIBER 失效
公开(公告)号：JPS61198103A
公开(公告)日：1986-09-02
申请号：JP3809785
申请日：1985-02-27
申请人： FURUKAWA ELECTRIC CO LTD
发明人： NISHIMURA MASAO , KIMURA MASAKI , HYODO SHINICHI
IPC分类号： G02B6/00 , C03B37/10 , C03B37/12
摘要： PURPOSE:To collect intensity distribution data on an optical fiber by detecting the rupture position of the optical fiber through a rupture position detecting means or detecting the rupture strength of the optical fiber through a rupture intensity detecting means when the optical fiber is ruptured. CONSTITUTION:The optical fiber 16 which runs from a supply machine 1 to a take-up machine 7 has a part with lower strength than a permissible part and is ruptured when guided to a tensile strength application testing mechanism 10, and its rupture sound is collected. Respective acoustic wave sensors 11, 12, and 13 are fitted at different positions, so the sound reaches the acoustic wave sensors at different arrival time. Arrival time differences of the rupture sound are processed electrically and electronically to detect and record the rupture position of the optical position.

82. 发明专利

JPS61170711A OPTICAL FIBER CORE 失效
公开(公告)号：JPS61170711A
公开(公告)日：1986-08-01
申请号：JP1202985
申请日：1985-01-25
申请人： FURUKAWA ELECTRIC CO LTD
发明人： OKAGAWA SHUJI , NISHIMURA MASAO
IPC分类号： C03C25/10 , G02B6/44
摘要： PURPOSE:To obtain an optical fiber core with which the transmission loss is lessened even after coating of the outermost layer coating and at a low temp. by using a resin curable by UV rays consisting essentially of an urethane acrylate modified silicone oligomer to form the primary coating layer inscribing the outermost layer coating among plural coating layers. CONSTITUTION:The primary coating layer inscribing the outermost layer coating among the plural coating layers of the optical fiber core is constituted of the resin curable by UV rays consisting essentially of the urethane acrylate modified silicone oligomer. The optical fiber core 5 is manufactured by forming first the inside coating layer 2 consisting of the resin curable by UV rays having about 0.1-0.5kg/mm Young's modulus around an optical fiber 1, providing the primary coating layer 3 consisting of the resin curable by UV rays consisting essentially of the urethane acrylate modified silicone oligomer around the layer 2 and forming Nylon 12 which is a thermoplastic resin by extrusion coating as the outermost layer coating 4 on the outside of the layer 3.

83. 发明专利

JPS6127331B2 JPS6127331B2 - 失效
公开(公告)号：JPS6127331B2
公开(公告)日：1986-06-25
申请号：JP6031783
申请日：1983-04-06
申请人： Furukawa Electric Co Ltd
发明人： YOSHIDA KAZUAKI , NISHIMURA MASAO , IINO AKIRA , OGURA KUNIO
IPC分类号： C03B19/06 , C03B19/14 , C03B37/012 , C03B37/014 , G02B6/00
CPC分类号： C03B37/0146

84. 发明专利

JPS60161358A MANUFACTURE OF COATED OPTICAL FIBER 失效
公开(公告)号：JPS60161358A
公开(公告)日：1985-08-23
申请号：JP1383884
申请日：1984-01-28
申请人： FURUKAWA ELECTRIC CO LTD
发明人： NISHIMURA MASAO , ORIMO KATSUMI , KATOU KOUJI , NISHIMOTO MASAYUKI
IPC分类号： C03C25/10 , C03B37/12 , G02B6/44
摘要： PURPOSE:To obtain the titled coated optical fiber having adhesiveness to the optical fiber, easy releasability from the secondary coated layer, a high-precision outer diameter, and highly durable characteristics by coating a coating material at least twice, baking the coating, and pluralizing the primary coated layer. CONSTITUTION:A soln. of a thermosetting resin having high adhesiveness to an optical fiber is coated on the outer circumference of an optical fiber 2 which is obtained by passing a quartz preform rod 1 through a spinning furnace A, and spinning the rod into threads by using a spary type coating device B, and the coated fiber is baked in a baking furnace C at about 500 deg.C to form an inner layer part 31 for the primary coated layer 3. Then a resin which is releasable from the secondary coated layer 4 is coated on the part 31 by passing the fiber through a pressure-die type deivce D, and baked in a baking furnace E to form the outer layer part 32 of the primary coated layer 3. The primary coated layer 3 having =D70 Shore hardness at ordinary temp. is formed in this way. Then the secondary coated layer 4 having greater thickness than the coated layer 3 is formed on the outer surface of the coated layer 3 by passing said coated fiber through a die type coating device F and a baking device G. A coated layer 5 is further formed with an extrusion coating device H, and the fiber is wound up after cooling by a winder J.

85. 发明专利

JPS60155538A PRODUCTION OF POROUS PREFORM FOR OPTICAL USE 失效
公开(公告)号：JPS60155538A
公开(公告)日：1985-08-15
申请号：JP1256884
申请日：1984-01-26
申请人： FURUKAWA ELECTRIC CO LTD
发明人： OGURA KUNIO , YANO SHINICHI , NISHIMURA MASAO , IINO AKIRA
IPC分类号： G02B6/00 , C03B37/014 , C03B37/018
摘要： PURPOSE:In the titled method comprising the deposition of glass soot in a reaction vessel, a preform having high quality is produced in high deposition efficiency, by controlling the opening degree of the reaction vessel, thereby stabilizing the flow of gas in the reaction vessel. CONSTITUTION:The cylindrical reaction vessel 1 has openings at both ends and is furnished with the exhaust port 2 and the injection end of the glass powder- forming apparatus 3 in the region for forming a preform. A rod 4 for the deposition of powder is placed at the center of the vessel 1. The rod is rotated and reciprocated along its length, and the glass powder formed in the apparatus 3 is blasted to the outer circumference of the rod to obtain a preform. The vessel 1 is evacuated from the evacuation port during the above procedure. The vessel 1 is also furnished with an opening 7 having an opening-controlling means 6 at the boundary between the chamber A of the preform-forming region and the chambers 1B, 1C adjoining the chamber A. In the course of the transfer of the rod 4 along its length, the opening degree of the opening 7 is controlled by the means 6. The gas flow in the chamber 1A caused by the exhaustion from the exhaust port 2 can be stabilized by this process.

86. 发明专利

JPS604522B2 失效
公开(公告)号：JPS604522B2
公开(公告)日：1985-02-05
申请号：JP2926577
申请日：1977-03-18
申请人： FURUKAWA ELECTRIC CO LTD
发明人： SAITO EISUKE , NISHIMURA MASAO
IPC分类号： H01B7/29 , H01B3/28 , H01B3/44

87. 发明专利

JPS58162907A RADIATION HAZARD PROCESSING TYPE OPTICAL FIBER 失效
公开(公告)号：JPS58162907A
公开(公告)日：1983-09-27
申请号：JP4606482
申请日：1982-03-23
申请人： FURUKAWA ELECTRIC CO LTD
发明人： IINO AKIRA , NISHIMURA MASAO
IPC分类号： G02B6/00 , C03B37/15 , G21C17/00
摘要： PURPOSE:To use a titled optical fiber for a long period of time, by forming a radiation hazard processing layer which is heated by electrification, on the outside circumference of an optical fiber, and restoring its characteristic without disusing it, even if a transmission characteristic of the optical fiber drops due to radiation exposure. CONSTITUTION:On the outside circumference of a quartz compound optical fiber 1 having a core 2 and a clad 3, a radiation hazard processing layer 4 having a physical property which is heated at the time of an electrified state, for instance, SnO2 whose specific resistance is 11X10 OMEGA.cm, In2O3, CdO, etc. whose specific resistance is 7X10 OMEGA.cm is formed. When the optical fiver is exposed to a radiant ray, and the transmission characteristic is deteriorated, it can be restored by electrifying and heating the radiation hazard processing layer 4, and the optical fiber 1 is heated by the processing layer concerned 4 being in a heated state, therefore, the transmission characteristic is restored. As for the heating, it is desirable to execute it at 120-200 deg.C for 1-20hr.

88. 发明专利

JPS58130128A MANUFACTURE OF METAL COATED OPTICAL FIBER 失效
公开(公告)号：JPS58130128A
公开(公告)日：1983-08-03
申请号：JP969782
申请日：1982-01-25
申请人： FURUKAWA ELECTRIC CO LTD
发明人： IINO AKIRA , NISHIMURA MASAO , KUROBA TOSHIAKI , SHIBUYA SEIJI , SATOU TSUGIO
IPC分类号： C03C25/42 , C03B37/00 , G02B6/44
摘要： PURPOSE:To manufacture the titled optical fiber having superior adhesive strength and long-term stability by forming a metal-glass layer around a glass preform rod, spinning the rod into a fiber, and forming a metallic coating layer around the fiber. CONSTITUTION:A glass soot layer 2 is formed around a preform rod 1 composed of a glass layer for a core and a glass layer for a clad, and the rod 1 is immersed in a soln. of a metal such as Cu or Fe for 10-60min, dried and heated to a high temp. with an oxyhydrogen flame burner or the like to convert the layer 2 into transparent glass, forming a metal-glass layer 2 consisting of metallic oxide and glass. The rod 1 is then spun into an optical fiber 4 by a conventional spinning means 3, and a metallic coating layer 6 is formed around the fiber 4 by a plating means such as an ionic plating method for a sputtering method. Thus, a metal coated optical fiber having highly reliable mechanical characteristics, heat and fire resistances, waterproof and moistureproof effects, etc. over a long term is obtd.

89. 发明专利

JPS57141554A PRODUCTION OF CAPILLARY COLUMN FOR GAS CHROMATOGRAPHY 失效
公开(公告)号：JPS57141554A
公开(公告)日：1982-09-01
申请号：JP2229081
申请日：1981-02-19
申请人： FURUKAWA ELECTRIC CO LTD
发明人： YOSHIDA KAZUAKI , NAMIKAWA TAKASHI , NISHIMURA MASAO , SATOU TSUGIO
IPC分类号： G01N30/02 , G01N30/60
摘要： PURPOSE:To obtain a capillary column of sufficient mechanical strength by heating and stretching a quartz tube to a capillary shape, applying a treatment with a silane coupling material on the surface thereof and coating a heat resistance resin thereon. CONSTITUTION:After a quartz tube 1 of 20mm. outside diameter and 17mm. inside diameter is washed, it is mounted to a glass lathe, and while the quartz tube is rotated, the tube is flame-polished with an oxyhydrogen burner. In an electric furnace 2 using carbon heated to about 2050 deg.C as a heater, the flame-polished tube 1 is drawn through an outside diameter measuring device 3 as a fine tube of about 300mmu outside diameter. Right after the drawing, silane having functional groups such as vinyl groups, amino groups or the like of aminopropyl triethoxy silane, etc. is coated 4 thereon. Next, it is dried in a drying furnace 5 of about 120 deg.C, after which heat resistant varnish such as polyimide, polyamide imide or the like is coated thereon by means of a die 6, and after it is baked in a curing furface 7, the tube is taken up. In this way, the capillary column of high strength is obtained without causing stripping of quartz and the heat resistant resin.

90. 发明专利

JPS573723A PREPARATION OF QUARTZ SEPARATING TUBE FOR GAS CHROMATOGRAPHY 失效
公开(公告)号：JPS573723A
公开(公告)日：1982-01-09
申请号：JP7452480
申请日：1980-06-03
申请人： FURUKAWA ELECTRIC CO LTD
发明人： YOSHIDA KAZUAKI , NISHIMURA MASAO , NAMIKAWA TAKASHI , KAMIYA TAMOTSU , SATOU TSUGIO , SHIBUYA SEIJI
IPC分类号： C03B20/00 , C03B23/047 , C03B29/00 , C03C15/00 , C03C25/10 , G01N30/60
摘要： PURPOSE:To prepare the titled separating tube made of quartz and having high mechanical strength, by subjecting a quartz tube to chemical polishing and flame polishing, and then heating and drawing to a capillary. CONSTITUTION:A quartz tube is dipped in an aqueous solution of hydrofluoric acid and/or an aqueous solution of a mixture of sulfuric acid and nitric acid, and the chemically polished tube is washed with water. A chlorine-containing gap or an inert gas is passed through the tube under a definite controlled pressure, and the tube is heated at >=1,400 deg.C with flame blasted to the surface of the rotating tube. The surface roughness is decreased to

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