JPS5575933A - Production of fiber for light transmission - Google Patents

Production of fiber for light transmission

Info

Publication number
JPS5575933A
JPS5575933A JP14892778A JP14892778A JPS5575933A JP S5575933 A JPS5575933 A JP S5575933A JP 14892778 A JP14892778 A JP 14892778A JP 14892778 A JP14892778 A JP 14892778A JP S5575933 A JPS5575933 A JP S5575933A
Authority
JP
Japan
Prior art keywords
preform
tube
fiber
temp
light transmission
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP14892778A
Other languages
Japanese (ja)
Other versions
JPS6137212B2 (en
Inventor
Shiro Kurosaki
Yuichi Usui
Minoru Watanabe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to JP14892778A priority Critical patent/JPS5575933A/en
Publication of JPS5575933A publication Critical patent/JPS5575933A/en
Publication of JPS6137212B2 publication Critical patent/JPS6137212B2/ja
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/02—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
    • C03B37/025—Manufacture of glass fibres or filaments by drawing or extruding, e.g. direct drawing of molten glass from nozzles; Cooling fins therefor from reheated softened tubes, rods, fibres or filaments, e.g. drawing fibres from preforms
    • C03B37/027—Fibres composed of different sorts of glass, e.g. glass optical fibres
    • C03B37/02754—Solid fibres drawn from hollow preforms
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/01—Manufacture of glass fibres or filaments
    • C03B37/012—Manufacture of preforms for drawing fibres or filaments
    • C03B37/01205—Manufacture of preforms for drawing fibres or filaments starting from tubes, rods, fibres or filaments
    • C03B37/01225—Means for changing or stabilising the shape, e.g. diameter, of tubes or rods in general, e.g. collapsing
    • C03B37/0124—Means for reducing the diameter of rods or tubes by drawing, e.g. for preform draw-down
    • C03B37/01245—Means for reducing the diameter of rods or tubes by drawing, e.g. for preform draw-down by drawing and collapsing
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2205/00—Fibre drawing or extruding details
    • C03B2205/08—Sub-atmospheric pressure applied, e.g. vacuum
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2205/00—Fibre drawing or extruding details
    • C03B2205/12—Drawing solid optical fibre directly from a hollow preform
    • C03B2205/14—Drawing solid optical fibre directly from a hollow preform comprising collapse of an outer tube onto an inner central solid preform rod
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2205/00—Fibre drawing or extruding details
    • C03B2205/12—Drawing solid optical fibre directly from a hollow preform
    • C03B2205/16—Drawing solid optical fibre directly from a hollow preform the drawn fibre consisting of circularly symmetric core and clad
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2205/00—Fibre drawing or extruding details
    • C03B2205/60—Optical fibre draw furnaces
    • C03B2205/62—Heating means for drawing
    • C03B2205/69—Auxiliary thermal treatment immediately prior to drawing, e.g. pre-heaters, laser-assisted resistance heaters

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)

Abstract

PURPOSE:To economically produce a fiber with improved light transmission properties by putting a quartz type glass rod consisting of a core and a clad and having a predetermined refractive index distribution in the diametrical direction into a high silica glass tube whose diameter is slightly larger than the rod diameter followed by melt spinning. CONSTITUTION:Preform 11a consisting of a core and a clad is put into high silica glass tube 12a slightly larger than preform 11a. While evacuating gap 13a with a vacuum pump, a suitable temp. distribution is held with heaters 14a, 14a'. when the softening temp. of tube 12a is lower than that of preform 11a, tube 12a is collapsed along preform 11a. In the contrary case, preform 11a is collapsed along tube 12a. Simultaneously with or independently of the high temp. collapsing, preform 11a and tube 12a are melt-spun to produce fiber 15a.
JP14892778A 1978-11-30 1978-11-30 Production of fiber for light transmission Granted JPS5575933A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14892778A JPS5575933A (en) 1978-11-30 1978-11-30 Production of fiber for light transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14892778A JPS5575933A (en) 1978-11-30 1978-11-30 Production of fiber for light transmission

Publications (2)

Publication Number Publication Date
JPS5575933A true JPS5575933A (en) 1980-06-07
JPS6137212B2 JPS6137212B2 (en) 1986-08-22

Family

ID=15463767

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14892778A Granted JPS5575933A (en) 1978-11-30 1978-11-30 Production of fiber for light transmission

Country Status (1)

Country Link
JP (1) JPS5575933A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1203755A1 (en) * 1999-06-22 2002-05-08 Mitsubishi Cable Industries, Ltd. Production method for optical fiber base material
EP1632460A1 (en) * 2003-05-19 2006-03-08 Sumitomo Electric Industries, Ltd. Optical fiber and method of producing the same
KR100624874B1 (en) 2005-03-29 2006-09-19 엘에스전선 주식회사 Direct drawing method for an optical fiber manufacture
KR100624873B1 (en) 2005-03-18 2006-09-19 엘에스전선 주식회사 The direct drawing process optical fiber preform for an optical fiber manufacture

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63156512A (en) * 1987-07-29 1988-06-29 Takuwa:Kk Liquid purification device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1203755A1 (en) * 1999-06-22 2002-05-08 Mitsubishi Cable Industries, Ltd. Production method for optical fiber base material
EP1203755A4 (en) * 1999-06-22 2011-04-13 Mitsubishi Cable Ind Ltd Production method for optical fiber base material
EP1632460A1 (en) * 2003-05-19 2006-03-08 Sumitomo Electric Industries, Ltd. Optical fiber and method of producing the same
EP1632460A4 (en) * 2003-05-19 2011-12-28 Sumitomo Electric Industries Optical fiber and method of producing the same
KR100624873B1 (en) 2005-03-18 2006-09-19 엘에스전선 주식회사 The direct drawing process optical fiber preform for an optical fiber manufacture
KR100624874B1 (en) 2005-03-29 2006-09-19 엘에스전선 주식회사 Direct drawing method for an optical fiber manufacture

Also Published As

Publication number Publication date
JPS6137212B2 (en) 1986-08-22

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