Title:
プリフォームを製造するための化学的気相成長法を行う間、光ファイバプリフォームの重量を測定する装置及び方法
Document Type and Number:
Japanese Patent JP2005534932
Kind Code:
A
Abstract:
An apparatus for measuring the weight of a preform for optical fibers during a chemical deposition process for the formation of a preform is disclosed. The apparatus has at least one elastic constraint associated with at least one end portion of an elongated element made of a chemical deposition substrate for the formation of the preform, a device for inducing an oscillation, for example axial, on said elongated element, a device for detecting the frequency of oscillation of said elongated element, and a device for calculating the weight of the preform according to the detected frequency of oscillation. Advantageously, the device allows the realisation of a method for measuring the weight of the preform wherein the errors in measurement caused by thermal drift effects, by the axial distribution of the masses on the preform and by loads which are different from the mass of the preform in formation are reduced to below the required precision in measurement.
Inventors:
Luciel, Marco
Demel Gazzi, Andrea
Sarchi, David
Demel Gazzi, Andrea
Sarchi, David
Application Number:
JP2004527079A
Publication Date:
November 17, 2005
Filing Date:
July 31, 2002
Export Citation:
Assignee:
Pirelli and Chi Sochieta Per Azioni
International Classes:
G01G17/02; C03B23/045; C03B37/014; C03B37/018; C23C16/42; C23C16/453; G01G3/16; (IPC1-7): G01G17/02; C03B37/018; C23C16/42; C23C16/453
Attorney, Agent or Firm:
Kazuo Shamoto
Tadashi Masui
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Shigeru Sakuma
Tadashi Masui
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Shigeru Sakuma