JPS55130830A - Producing preform - Google Patents

Producing preform

Info

Publication number
JPS55130830A
JPS55130830A JP3653679A JP3653679A JPS55130830A JP S55130830 A JPS55130830 A JP S55130830A JP 3653679 A JP3653679 A JP 3653679A JP 3653679 A JP3653679 A JP 3653679A JP S55130830 A JPS55130830 A JP S55130830A
Authority
JP
Japan
Prior art keywords
block
rod
glass
washed
refractive index
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
JP3653679A
Other languages
Japanese (ja)
Other versions
JPS6054891B2 (en
Inventor
Shiro Kurosaki
Minoru Watanabe
Yuichi Usui
Shigeo Murai
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 JP3653679A priority Critical patent/JPS6054891B2/en
Publication of JPS55130830A publication Critical patent/JPS55130830A/en
Publication of JPS6054891B2 publication Critical patent/JPS6054891B2/en
Expired 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
    • C03B37/01262—Depositing additional preform material as liquids or solutions, e.g. solution doping of preform tubes or rods
    • 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
    • C03B37/01228—Removal of preform material
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B2201/00—Type of glass produced
    • C03B2201/06—Doped silica-based glasses
    • C03B2201/30—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi
    • C03B2201/50—Doped silica-based glasses doped with metals, e.g. Ga, Sn, Sb, Pb or Bi doped with alkali metals

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)
  • Glass Melting And Manufacturing (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)
  • Glass Compositions (AREA)

Abstract

PURPOSE:To provide preform not having abnormal refractive index point by a method wherein a block is subjected to phase-separation heat treatment and acid elution to form a porous glass block, and small blocks are cut out from a part other than the center section of the block and subjected to dopant treatment after polishing. CONSTITUTION:To produce preform as base material for rod glass used in optical communication, phase-separable glass such as Na2O-K2O-B2O3-SiO2 is cut out, heat-treated, leached in 3N HCl at 100 deg.C so that a soft phase is eluted from the surface of block 21 to produce a porous glass block 21. Because the center area of the block 21 gives an abnormal refractive index point, the block is cut along a line 22 passing the center, further cut into a small square rod 23 which is separated as 23' and is sequentially polished as shown from 24-26 to form a round rod 26. The rod 26 is washed with aqueous 3N HNO3 solution and with water to provide a porous glass rod. Then, the rod is immersed in aqueous CsNO3 at 105 deg.C, maintained at 20 deg.C for several hours, washed with water, then washed with ethyl alcohol, to remove dissolved CsNO3, soaked with C3H7OH, and heated, while being slowly dried, up to 850 deg.C so that optical glass having proper refractive index distribution is provided.
JP3653679A 1979-03-27 1979-03-27 Preform manufacturing method Expired JPS6054891B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3653679A JPS6054891B2 (en) 1979-03-27 1979-03-27 Preform manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3653679A JPS6054891B2 (en) 1979-03-27 1979-03-27 Preform manufacturing method

Publications (2)

Publication Number Publication Date
JPS55130830A true JPS55130830A (en) 1980-10-11
JPS6054891B2 JPS6054891B2 (en) 1985-12-02

Family

ID=12472498

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3653679A Expired JPS6054891B2 (en) 1979-03-27 1979-03-27 Preform manufacturing method

Country Status (1)

Country Link
JP (1) JPS6054891B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6177629A (en) * 1984-09-21 1986-04-21 Hoya Corp Production of spherical lens having refractive index distribution

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6177629A (en) * 1984-09-21 1986-04-21 Hoya Corp Production of spherical lens having refractive index distribution

Also Published As

Publication number Publication date
JPS6054891B2 (en) 1985-12-02

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