Title:
光ファイバプレフォームを伸長するための処理法および装置
Document Type and Number:
Japanese Patent JP2005534613
Kind Code:
A
Abstract:
A process and apparatus for elongating an optical fibre preform includes heating the preform so as to soften one region thereof; elongating the preform by submitting the preform to a traction; determining, during the step of elongating, the preform diameter in at least one measuring point along the preform; and controlling the step of elongating on the basis of the determined diameter. During the step of elongating, at least a geometrical parameter of the preform is measured, and the position of said diameter measuring point is controlled according to the measured geometrical parameter. Measuring at least a geometrical parameter of the preform may be accomplished by determining the profile of at least a portion of the softened region, e.g., an image of the neck region profile.
Inventors:
Milleo, Antonio
Luciel, Marco
Luciel, Marco
Application Number:
JP2004529740A
Publication Date:
November 17, 2005
Filing Date:
July 30, 2002
Export Citation:
Assignee:
Pirelli and Chi Sochieta Per Azioni
International Classes:
C03B37/012; C03B37/07; (IPC1-7): C03B37/012; C03B37/07
Attorney, Agent or Firm:
Kazuo Shamoto
Tadashi Masui
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Yoshio Akimoto
Tadashi Masui
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Yoshio Akimoto