The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 10, 2005
Filed:
Oct. 25, 2001
Toshihiro Ooishi, Yokohama, JP;
Yuichi Ohga, Yokohama, JP;
Yoshio Yokoyama, Yokohama, JP;
Motonori Nakamura, Yokohama, JP;
Toshihiro Ooishi, Yokohama, JP;
Yuichi Ohga, Yokohama, JP;
Yoshio Yokoyama, Yokohama, JP;
Motonori Nakamura, Yokohama, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
A method for producing an optical fiber preform is provided in which the variation of the outer diameter in the longitudinal direction is minimized and a target quantity of glass is accumulated as a whole. Based on a predetermined relationship between three variables: the outer diameter of a starting rod being a first variable, the outer diameter of an optical fiber preform a second variable, and the timing for ending the glass particles depositing process a third variable, the starting rod and burners are subjected to relative reciprocating movement so as to deposit glass particles on the starting rod until the timing for ending the depositing process, and then the resulting deposit body is vitrified. The third variable may be the traverse velocity, the glass particles deposition time, or the weight of a soot glass deposit body.