Title:
GLASS MATRIX, MATHOD FOR PRODUCING THE SAME AND METHOD FOR PRODUCING OPTICAL FIBER
Document Type and Number:
WIPO Patent Application WO/2005/115935
Kind Code:
A1
Abstract:
When a tapered part is formed at the end part of a glass matrix for producing an optical fiber, the center line displacement of a fused part from the center line of the glass matrix is corrected below a specified numeric value, and the tapered part is formed by fusing the glass matrix at the corrected part. In a drawing glass matrix having a straight body effective part of average outside diameter D and a tapered part at one end thereof, a relation of &dgr /D≤0.03 is satisfied between a distortion &dgr of the tapered part represented by the maximum center line displacement of the glass matrix between the straight body effective part end near the tapered part and the distortion evaluating end of the tapered part, and the average outside diameter D when the glass matrix is attached to a drawing machine. Consequently, the eccentricity of the optical fiber is reduced quickly at the initial stage of drawing and the excess length is decreased.
Inventors:
SAKASHITA MITSUKUNI (JP)
Application Number:
PCT/JP2005/008540
Publication Date:
December 08, 2005
Filing Date:
May 10, 2005
Export Citation:
Assignee:
SHINETSU CHEMICAL CO (JP)
SAKASHITA MITSUKUNI (JP)
SAKASHITA MITSUKUNI (JP)
International Classes:
C03B37/012; C03B37/027; C03B33/085; (IPC1-7): C03B37/012; C03B33/085
Foreign References:
| JP2001080931A | 2001-03-27 | |||
| JPH10158024A | 1998-06-16 | |||
| JP2000264662A | 2000-09-26 | |||
| JPH1081535A | 1998-03-31 |
Other References:
See also references of EP 1772438A4
Attorney, Agent or Firm:
Ryuka, Akihiro (22-1 Nishi-Shinjuku 6-chom, Shinjuku-ku Tokyo, JP)
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