中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

381 records (took 0.025 seconds)

    31.
    发明专利
    未知

    公开(公告)号：FI96944B

    公开(公告)日：1996-06-14

    申请号：FI920784

    申请日：1992-02-24

    Applicant: SUMITOMO ELECTRIC INDUSTRIES

    Inventor： ITO MASUMI ,  KANAMORI HIROO ,  DANZUKA TOSHIO ,  YOKOTA HIROSHI

    IPC: C03B37/012 ,  C03B37/014 ,  G02B6/00

    Abstract: A glass preform for use in the fabrication of an optical fiber having a low transmission loss is produced by inserting a glass rod as a core material in a glass tube as a cladding material having a lower refractive index than that of the core material, and heating the so formed composite of the glass rod and the glass tube from the outside after filling a mixed gas containing a halogen-containing gas and oxygen gas in a space between the glass rod and the glass tube to fuse them together to produce the glass preform. Formation of bubbles in the glass preform is thereby suppressed.

    33.
    发明专利
    未知

    公开(公告)号：DE69209147D1

    公开(公告)日：1996-04-25

    申请号：DE69209147

    申请日：1992-06-05

    Applicant: SUMITOMO ELECTRIC INDUSTRIES

    Inventor： SAITOH TATSUHIKO ,  DANZUKA TOSHIO

    IPC: C03B8/04 ,  C03B20/00 ,  C03B37/014 ,  C03B37/018 ,  G02B6/00

    Abstract: A glass soot deposit is produced at a high deposition rate by blowing a gaseous glass-forming raw material together with a fuel gas from a combustion burner in a closed muffle tube, hydrolyzing the glass-forming raw material in a flame to generate glass soot, and depositing the glass soot on a tip end or a peripheral surface of a starting member which is rotated to form a glass soot deposit . The lowest surface temperature of the muffle tube is maintained at 50 DEG C or higher and an average surface temperature of the muffle tube is maintained in a range between 50 DEG C and 150 DEG C, whereby corrosion of the muffle tube is prevented.

    34.
    发明专利
    未知

    公开(公告)号：DE69006138T2

    公开(公告)日：1994-06-30

    申请号：DE69006138

    申请日：1990-08-28

    Applicant: SUMITOMO ELECTRIC INDUSTRIES

    Inventor： OHGA YUICHI ,  DANZUKA TOSHIO ,  KANAMORI HIROO ,  YOKOTA HIROSHI

    IPC: C03B37/014 ,  C03B37/018

    Abstract: A method for producing a porous preform for use in the fabrication of an optical fiber with at least two burners for synthesizing glass soot particles at least one of which generates a double-layer flame and at least one of which is used for forming a core part of the preform, which method comprises steps of supplying SiCl4 and optionally GeCl4 to an inner flame of the double-layer flame, and SiCl4 to an outer flame of the double-layer flame to flame hydrolyze the supplied compounds to synthesize glass soot particles, supplying SiCl4 and GeCl4 as glass-forming raw materials to the burner for forming the core part to flame hydrolyze the supplied compound to synthesized glass soot particles and depositing the generated glass soot particles on the lower end of a rotating starting member and growing the porous preform in a direction of an axis of the starting member to produce the porous preform comprising a core part containing at least partly GeO2, a porous preform produced by this method gives a transparent glass preform a surface of which is not cracked or peeled off.

    Method for producing glass preform for optical fiber
    36.
    发明专利
    Method for producing glass preform for optical fiber 未知

    公开(公告)号：AU649519B2

    公开(公告)日：1994-05-26

    申请号：AU1118992

    申请日：1992-02-25

    Applicant: SUMITOMO ELECTRIC INDUSTRIES

    Inventor： ITO MASUMI ,  KANAMORI HIROO ,  DANZUKA TOSHIO ,  YOKOTA HIROSHI

    IPC: C03B37/012 ,  C03B37/014 ,  G02B6/00

    Abstract: A glass preform for use in the fabrication of an optical fiber having a low transmission loss is produced by inserting a glass rod as a core material in a glass tube as a cladding material having a lower refractive index than that of the core material, and heating the so formed composite of the glass rod and the glass tube from the outside after filling a mixed gas containing a halogen-containing gas and oxygen gas in a space between the glass rod and the glass tube to fuse them together to produce the glass preform. Formation of bubbles in the glass preform is thereby suppressed.

    Method for producing glass article
    37.
    发明专利
    Method for producing glass article 未知

    公开(公告)号：AU646490B2

    公开(公告)日：1994-02-24

    申请号：AU8353991

    申请日：1991-09-03

    Applicant: SUMITOMO ELECTRIC INDUSTRIES

    Inventor： DANZUKA TOSHIO ,  ITO MASUMI ,  TAKAGI MASAHIRO ,  YOKOTA HIROSHI

    IPC: G02B6/00 ,  C03B8/04 ,  C03B37/014 ,  C03B37/018

    Abstract: A glass article is produced at a high production rate and a high yield by jetting a glass-forming raw material from a multi-port burner, synthesizing glass soot through hydrolysis of the glass-forming raw material, depositing the glass soot to form a soot preform and heating and vitrifying the soot preform to produce a transparent glass article, wherein the glass-forming raw material is vaporized by heating it at a temperature higher than its boiling point and directly supplied to the burner, the vaporized glass-forming raw material and a fuel gas for synthesizing glass soot are supplied to an inner port of the multi-port burner and a fuel gas for heating a formed preform is supplied to an outer port of the multi-port burner, and a molar ratio of water generated by a reaction of the fuel gas for synthesizing glass soot to the glass-forming raw material is from 2 to 3.

    38.
    发明专利
    未知

    公开(公告)号：FI91146B

    公开(公告)日：1994-02-15

    申请号：FI904218

    申请日：1990-08-27

    Applicant: SUMITOMO ELECTRIC INDUSTRIES

    Inventor： OHGA YUICHI ,  DANZUKA TOSHIO ,  KANAMORI HIROO ,  YOKOTA HIROSHI

    IPC: C03B37/014 ,  C03B37/018

    Abstract: A method for producing a porous preform for use in the fabrication of an optical fiber with at least two burners for synthesizing glass soot particles at least one of which generates a double-layer flame and at least one of which is used for forming a core part of the preform, which method comprises steps of supplying SiCl4 and optionally GeCl4 to an inner flame of the double-layer flame, and SiCl4 to an outer flame of the double-layer flame to flame hydrolyze the supplied compounds to synthesize glass soot particles, supplying SiCl4 and GeCl4 as glass-forming raw materials to the burner for forming the core part to flame hydrolyze the supplied compound to synthesized glass soot particles and depositing the generated glass soot particles on the lower end of a rotating starting member and growing the porous preform in a direction of an axis of the starting member to produce the porous preform comprising a core part containing at least partly GeO2, a porous preform produced by this method gives a transparent glass preform a surface of which is not cracked or peeled off.

Patent Agency Ranking