JPS5645841A - Outside diameter controlling method of optical fiber base material - Google Patents

Outside diameter controlling method of optical fiber base material

Info

Publication number
JPS5645841A
JPS5645841A JP12068279A JP12068279A JPS5645841A JP S5645841 A JPS5645841 A JP S5645841A JP 12068279 A JP12068279 A JP 12068279A JP 12068279 A JP12068279 A JP 12068279A JP S5645841 A JPS5645841 A JP S5645841A
Authority
JP
Japan
Prior art keywords
detection signal
outside diameter
base material
optical fiber
fiber base
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
JP12068279A
Other languages
Japanese (ja)
Other versions
JPS5740095B2 (en
Inventor
Katsuyuki Imoto
Masao Sumi
Koji Ishida
Yasuo Suganuma
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.)
Hitachi Cable Ltd
Hitachi Ltd
Original Assignee
Hitachi Cable Ltd
Hitachi 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 Hitachi Cable Ltd, Hitachi Ltd filed Critical Hitachi Cable Ltd
Priority to JP12068279A priority Critical patent/JPS5645841A/en
Publication of JPS5645841A publication Critical patent/JPS5645841A/en
Publication of JPS5740095B2 publication Critical patent/JPS5740095B2/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
    • C03B37/014—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]
    • C03B37/01486—Means for supporting, rotating or translating the preforms being formed, e.g. lathes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General 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 obtain an optical fiber base material of a uniform outside diameter by detecting the outside diameter during the deposition process near the end face of growth optically noncontactually and controlling the axial moving speed of the porous base material based on the detection signal thereof in such a manner that the outside diameter becomes constant. CONSTITUTION:In the production of an optical fiber base material by depositing fine glass particles at the tip of a bar-shaped starting material, allowing the bar- shaped fine glass particle deposited body to grow and converting this to transparent glass in a heating furnace, the part A-A' of the deposit is placed in the laser luminous flux 14 which repeats scanning at fixed speed by a laser scanning part 9. The length of the shadow produced thereby is received in a photodetecting part and is electrically processed to a detection signal. This detection signal and the signal corresponding to the present reference outside diameter is inputted to a control circuit 11, which so acts that when the detection signal is smaller than the reference signal the motor drive voltage lowers to decelerate the target 5, thereby approaching the detection signal and the reference signal. If the detection signal is larger than the reference signal, it operates reverse.
JP12068279A 1979-09-21 1979-09-21 Outside diameter controlling method of optical fiber base material Granted JPS5645841A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12068279A JPS5645841A (en) 1979-09-21 1979-09-21 Outside diameter controlling method of optical fiber base material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12068279A JPS5645841A (en) 1979-09-21 1979-09-21 Outside diameter controlling method of optical fiber base material

Publications (2)

Publication Number Publication Date
JPS5645841A true JPS5645841A (en) 1981-04-25
JPS5740095B2 JPS5740095B2 (en) 1982-08-25

Family

ID=14792331

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12068279A Granted JPS5645841A (en) 1979-09-21 1979-09-21 Outside diameter controlling method of optical fiber base material

Country Status (1)

Country Link
JP (1) JPS5645841A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6090808A (en) * 1983-10-25 1985-05-22 Kobe Steel Ltd Molded body of honeycomb activated carbon for decomposing ozone

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6090808A (en) * 1983-10-25 1985-05-22 Kobe Steel Ltd Molded body of honeycomb activated carbon for decomposing ozone
JPH0131449B2 (en) * 1983-10-25 1989-06-26 Kobe Seikosho Kk

Also Published As

Publication number Publication date
JPS5740095B2 (en) 1982-08-25

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