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:
Jun. 25, 2002
Filed:
Jun. 25, 1999
Samsung Electronics Co., Ltd., Suwon, KR;
Abstract
An apparatus and a method for manufacturing an optical fiber preform by modified chemical vapor deposition (MDVD). The apparatus includes a heating device for heating a rotating substrate tube while moving in a predetermined direction, wherein the heating unit has a first heating unit located at the front with respect to the moving direction, for heating the substrate tube with a relatively low flame pressure, and a second heating unit located at the rear of the first heating means with respect to the moving direction, for heating the substrate tube with a relatively high flame pressure. The first and second heating units are selectively used for deposition and collapsing, such that the duration and temperature of collapsing can be reduced.
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