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Title:
METHOD OF MANUFACTURING POROUS PREFORM FOR OPTICAL FIBER AND GLASS PREFORM
Document Type and Number:
Japanese Patent JP2005247636
Kind Code:
A
Abstract:

To provide a method of manufacturing a porous glass preform by which the deposition rate of a glass fine particle on a deposition surface is increased, soot suspended in a reaction vessel is reduced and the occurrence of bubbles produced in a product is prevented and the glass preform.

In the method of manufacturing the porous glass preform by flame-hydrolyzing a glass raw material in oxyhydrogen flame and depositing the produced glass fine particle, the glass fine particle is deposited by moving a center rod upward at almost fixed speed with the deposition of the glass fine particle and jetting flame stream containing the synthesized glass fine particle toward the glass fine particle deposition surface from the diagonally downward direction to form a recessed part on the deposition bottom surface of a deposited body.


Inventors:
OTSUSAKA TETSUYA
INOUE MASARU
Application Number:
JP2004000060499
Publication Date:
September 15, 2005
Filing Date:
March 04, 2004
Export Citation:
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Assignee:
SHINETSU CHEMICAL CO
International Classes:
C03B8/04; C03B37/012; C03B37/018; (IPC1-7): C03B8/04; C03B37/018
Domestic Patent References:
JPH054825A1993-01-14
JPS60260433A1985-12-23
JP2000063141A2000-02-29
Attorney, Agent or Firm:
荒井 鐘司
河野 尚孝
嶋崎 英一郎