JPS5520260A - Continuously producing apparatus for optical fiber base material - Google Patents

Continuously producing apparatus for optical fiber base material

Info

Publication number
JPS5520260A
JPS5520260A JP9310578A JP9310578A JPS5520260A JP S5520260 A JPS5520260 A JP S5520260A JP 9310578 A JP9310578 A JP 9310578A JP 9310578 A JP9310578 A JP 9310578A JP S5520260 A JPS5520260 A JP S5520260A
Authority
JP
Japan
Prior art keywords
base material
motor
unit
change
diameter
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
JP9310578A
Other languages
Japanese (ja)
Other versions
JPS6120493B2 (en
Inventor
Fumiaki Hanawa
Shoichi Sudo
Kazunori Senda
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP9310578A priority Critical patent/JPS5520260A/en
Publication of JPS5520260A publication Critical patent/JPS5520260A/en
Publication of JPS6120493B2 publication Critical patent/JPS6120493B2/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
    • C03B37/012—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
    • C03B37/01257—Heating devices therefor
    • 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
    • C03B37/014—Manufacture of preforms for drawing fibres or filaments made entirely or partially by chemical means, e.g. vapour phase deposition of bulk porous glass either by outside vapour deposition [OVD], or by outside vapour phase oxidation [OVPO] or by vapour axial deposition [VAD]
    • C03B37/01446—Thermal after-treatment of preforms, e.g. dehydrating, consolidating, sintering
    • C03B37/0146—Furnaces therefor, e.g. muffle tubes, furnace linings

Landscapes

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

Abstract

PURPOSE:To produce the title base material stably and continuously by perfectly isolating the inside and outside atmospheres of a transparent glass forming furnace with seal gas without contacting to the base material to protect a carbon heating element. CONSTITUTION:Light beams emitted from light source 21 are introduced into optical system 22 through fiber 27, and light beams emitted from system 22 are isolated by glass base material 4 and received in light receiving part 23. The beams are converted into electrical signals in part 23, and an electrical signal corresponding to a change in outside diameter of material 4 is taken out of controller 24 and memorized in memory circuit 25. After a time in proportion to the distance between the diameter change measuring position and drawing unit 28 is delayed with circuit 25, the signal is sent to actuate motor 26, thereby changing the inside diameter of unit 28 with motor 26. After a time to drawing unit 28' is delayed similarly, motor 26' is actuated to change the inside diameter of unit 28'. Seal gas is fed between units 28,28' to gas-seal the space between material 4 and units 28,28'.
JP9310578A 1978-08-01 1978-08-01 Continuously producing apparatus for optical fiber base material Granted JPS5520260A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9310578A JPS5520260A (en) 1978-08-01 1978-08-01 Continuously producing apparatus for optical fiber base material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9310578A JPS5520260A (en) 1978-08-01 1978-08-01 Continuously producing apparatus for optical fiber base material

Publications (2)

Publication Number Publication Date
JPS5520260A true JPS5520260A (en) 1980-02-13
JPS6120493B2 JPS6120493B2 (en) 1986-05-22

Family

ID=14073236

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9310578A Granted JPS5520260A (en) 1978-08-01 1978-08-01 Continuously producing apparatus for optical fiber base material

Country Status (1)

Country Link
JP (1) JPS5520260A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6296336A (en) * 1985-10-21 1987-05-02 Nippon Telegr & Teleph Corp <Ntt> Production of optical fiber preform and apparatus therefor
EP0542724A2 (en) * 1987-02-16 1993-05-19 Sumitomo Electric Industries Limited Furnace for heating glass preform for optical fiber and method for producing glass preform
FR2802916A1 (en) * 1999-12-27 2001-06-29 Cit Alcatel PREFORM INPUT ARRANGEMENT FOR FIBER OPTIC DRAWING OVEN, OVEN HAVING SUCH ARRANGEMENT AND PREFORM EQUIPPED TO COOPERATE WITH THIS ARRANGEMENT

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6296336A (en) * 1985-10-21 1987-05-02 Nippon Telegr & Teleph Corp <Ntt> Production of optical fiber preform and apparatus therefor
JPH0583500B2 (en) * 1985-10-21 1993-11-26 Nippon Telegraph & Telephone
EP0542724A2 (en) * 1987-02-16 1993-05-19 Sumitomo Electric Industries Limited Furnace for heating glass preform for optical fiber and method for producing glass preform
FR2802916A1 (en) * 1999-12-27 2001-06-29 Cit Alcatel PREFORM INPUT ARRANGEMENT FOR FIBER OPTIC DRAWING OVEN, OVEN HAVING SUCH ARRANGEMENT AND PREFORM EQUIPPED TO COOPERATE WITH THIS ARRANGEMENT
EP1112978A1 (en) * 1999-12-27 2001-07-04 Alcatel Preform entry device for an optical fibre draw furnace and draw furnace comprising said entry device

Also Published As

Publication number Publication date
JPS6120493B2 (en) 1986-05-22

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