JPS55130830A - Producing preform - Google Patents
Producing preformInfo
- 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
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.
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)
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 |
-
1979
- 1979-03-27 JP JP3653679A patent/JPS6054891B2/en not_active Expired
Cited By (1)
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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