中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

16 records (took 0.022 seconds)

    2.
    发明专利
    未知

    公开(公告)号：DE3768789D1

    公开(公告)日：1991-04-25

    申请号：DE3768789

    申请日：1987-11-13

    Applicant: SUMITA OPTICAL GLASS

    Inventor： SAWANOBORI NARUHITO ,  NAGAHAMA SHINOBU ,  BABA NOBUYOSHI

    IPC: C03C3/247

    Abstract: A fluorophosphate optical glass with a low refractive index and low dispersion is provided in stable manner, which has a refractive index nd of 1.42 to 1.47 and an Abbe number nu d of 90 to 97 and comprises 3 to 8 mole % of P2O5, 0.1 to 2 mole % of Al2O3, 1 to 7 mole % of BaO, 35.5 to 41 mole % of AlF3, 8 to 13 mole % of MgF2, 16 to 26 mole % of CaF2, 15 to 21 mole % of SrF2, 3.5 to 10 mole % of BaF2 and 1 to 6 mole % of NaF. The invention also includes a process of making fluorophosphate optical glass and optical parts formed from the novel glass, and camera lenses and the like comprising such optical parts.

    Multicomponent glass for ultraviolet light resistant optical fiber, and optical fiber
    5.
    发明专利
    Multicomponent glass for ultraviolet light resistant optical fiber, and optical fiber 有权

    公开(公告)号：JP2004182565A

    公开(公告)日：2004-07-02

    申请号：JP2002353782

    申请日：2002-12-05

    Applicant: Sumita Optical Glass Inc ,  株式会社住田光学ガラス

    Inventor： BABA NOBUYOSHI ,  SAWANOBORI SHIGETO

    IPC: G02B6/00 ,  C03C13/04

    CPC classification number: C03C13/046 ,  C03C3/068 ,  C03C3/115 ,  C03C3/118

    Abstract: PROBLEM TO BE SOLVED: To provide multicomponent glasses for an ultraviolet light resistant core and clad, in which there is a difference not lower than a certain extent between refractive indices of the core and the clad, and the coefficients of the thermal expansion of the core and the clad are set to be nearly same; and to provide an inexpensive ultraviolet light resistant optical fiber obtained by using the same, which substitutes for a conventional quartz fiber. SOLUTION: The multicomponent glass for the clad of the ultraviolet light resistant optical fiber comprises, by mol, 50-55% SiO 2 , 10-17% B 2 O 3 , 19-25% KF, 7-10% AlF 3 and 1-5% Al 2 O 3 . The multicomponent glass for the core of the ultraviolet light resistant optical fiber comprises, by mol, 44-60% SiO 2 , 8-16% B 2 O 3 , 25-35% KF, 0.1-12% ZrO 2 , 0-10% La 2 O 3 , and 0-5% K 2 O. The ultraviolet light resistant optical fiber is obtained by using the multicomponent glasses for the clad and the core. COPYRIGHT: (C)2004,JPO&NCIPI

    OPTICAL GLASS
    7.
    发明专利
    OPTICAL GLASS 失效

    公开(公告)号：JPH01148726A

    公开(公告)日：1989-06-12

    申请号：JP30708787

    申请日：1987-12-04

    Applicant: SUMITA OPTICAL GLASS

    Inventor： KOMIYA MASAYUKI ,  BABA NOBUYOSHI ,  NAGAHAMA SHINOBU

    IPC: C03C3/062

    Abstract: PURPOSE:To obtain an optical glass composition for precision press molding lens possible to be precisely pressed at a low temp., eliminating the need for grainding or polishing after pressing, by using SiO2, TiO2, Nb2O5, Na2O and Cs2O as essential component in a specified compsn. CONSTITUTION:The optical glass having following compsn and characteristics is optical glass for precision press molding lens having low specific gravity. The optical glass consists of 20-26%, in wt.%, SiO2, 0-15% B2O3, 14-30% TiO2, 14-22% Nb2O5 and besides, 30-52% TiO2+Nb2O5 and 3-18% Na2O, 8-23% Cs2O, 0-23% Li2O, 0-8% K2O and besides, 25-37% Na2O+Cs2O+Li2O +K2O. And, the optical glass has

    INFRARED RAY-TRANSMITTING GLASS
    9.
    发明专利
    INFRARED RAY-TRANSMITTING GLASS 失效

    公开(公告)号：JPH01294550A

    公开(公告)日：1989-11-28

    申请号：JP12537588

    申请日：1988-05-23

    Applicant: SUMITA OPTICAL GLASS

    Inventor： SAWANOBORI SHIGETO ,  YAMAUCHI JUNYA ,  BABA NOBUYOSHI ,  NAGAHAMA SHINOBU

    IPC: C03C3/32 ,  C03C4/10

    Abstract: PURPOSE:To provide the stable title glass capable of transmitting light from visible area to wide infrared ray area and having excellent infrared ray transmission by constituting a glass of ZrF4, BaCl2, LiF and NaF having a specific molar ratio. CONSTITUTION:The aimed infrared ray transmitting glass has a composition consisting of 35-65mol% ZrF4, 5-30mol% BaCl2, 5-30mol% LiF, 5-30mol% NaF and 10-60mol% total amount of LiF and NaF. Ionization tendency can be lessen by furthermore adding at least one kind selected from AlF3, GaF3, YF3, LaF3 and GdF3 to the above-mentioned composition at an amount of 1-15%. Stability can be further improved by moreover adding at least one kind selected from CaF2, SrF2 and BaF2 thereto at an amount of 3-30%. The resultant infrared ray-transmitting glass is useful as a lens, etc., used in infrared ray area.

    OPTICAL GLASS FOR PRECISION PRESS FORMING
    10.
    发明专利
    OPTICAL GLASS FOR PRECISION PRESS FORMING 失效

    公开(公告)号：JPH01286934A

    公开(公告)日：1989-11-17

    申请号：JP11315288

    申请日：1988-05-10

    Applicant: SUMITA OPTICAL GLASS

    Inventor： BABA NOBUYOSHI ,  KOMIYA MASAYUKI ,  NAGAHAMA SHINOBU

    IPC: C03C3/068

    Abstract: PURPOSE:To produce the subject glass having low softening point, high refractive index and low dispersion, at a relatively low temperature, by compounding B2O3, SiO2, La2O3, Gd2O3, Li2O, CaO and BaO at specific ratios. CONSTITUTION:A mixture is produced by compounding 10-35wt.% of B2O3, 5-30wt.% of SiO2, 0-35wt.% of La2O3, 0-35wt.% of Gd2O3 (La2O3+Gd2O3 is 20-40wt.%), 3-8wt.% of Li2O, 0-20wt.% of CaO and 0-25wt.% of BaO (CaO+BaO is 10-30wt.%). The mixture is optionally added with a small amount of As2O3 (defoaming and color-protection agent), melted at 1,100-1,300 deg.C, formed and cooled to obtain an optical glass for precision press forming having a deflection temperature (At) of

Patent Agency Ranking