Apparatus for producing porous preforms for optical fibers
Номер патента: CA1234971A
Опубликовано: 12-04-1988
Автор(ы): Hideo Kakuzen, Masaaki Yoshida, Shigeki Endo, Shigeru Kisanuki
Принадлежит: Sumitomo Electric Industries Ltd
Опубликовано: 12-04-1988
Автор(ы): Hideo Kakuzen, Masaaki Yoshida, Shigeki Endo, Shigeru Kisanuki
Принадлежит: Sumitomo Electric Industries Ltd
Реферат: ABSTRACT OF THE DISCLOSURE An apparatus for the production of a porous preform of SiO2 used in the manufacture of optical fiber wherein damage to the preform caused by falling clusters of SiO2 or GeO2 formed on the wall of the deposition chamber is eliminated. In accordance with the invention, a conductive shielding layer is provided inside the wall defining the deposition chamber. This shielding layer cancels an electrostatic field produced on the wall by charging, therefore preventing the adherence of fine particles thereto.
Process for heating vitrification of porous preform for optical fiber
Номер патента: CA2085198C. Автор: Masumi Ito,Ichiro Tsuchiya,Toshio Danzuka. Владелец: Sumitomo Electric Industries Ltd. Дата публикации: 1996-10-01.