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    Absorptive glass
    4.
    发明授权
    Absorptive glass 失效
    吸收玻璃

    公开(公告)号：US3904425A

    公开(公告)日：1975-09-09

    申请号：US37481164

    申请日：1964-06-12

    Applicant: AMERICAN OPTICAL CORP

    Inventor： YOUNG ROBERT W ,  GRAF ROBERT E

    IPC: C03C1/10 ,  C03C3/087 ,  C03C13/04 ,  C03C13/00

    CPC classification number: C03C3/087 ,  C03C1/10 ,  C03C13/046

    Abstract: 1. A glass material having a calculated oxide composition comprising

    A 100 MICRON THICKNESS OF SAID GLASS MATERIAL HAVING AN OPTICAL DENSITY GREATER THAN 0.25 AT LEAST FOR LIGHT FROM 0.4 TO 0.6 MICRONS WAVELENGTH.

    Abstract translation: 1.具有计算的氧化物组成的玻璃材料，包含}重量百分比}二氧化硅（SiO 2）51.9}氧化钠（Na 2 O）6.5}氧化钾（K 2 O）6.8}氧化钙（CaO）6.5}三氧化锑（Sb 2 O 3）0.4 }氧化铝（Al2O3）1.4}氧化锌（ZnO）2.2}二氧化钛（TiO2）0.4}二氧化锰（MnO2）23.4}氧化铬（Cr2O3）0.5}总计100.0} A 100微米厚度的玻璃材料具有光学 密度大于0.25，最小为0.4至0.6微米波长。

    6.
    发明专利
    未知

    公开(公告)号：FR2356608A1

    公开(公告)日：1978-01-27

    申请号：FR7620056

    申请日：1976-07-01

    Applicant: AMERICAN OPTICAL CORP

    Inventor： KROHN DAVID A ,  GRAF ROBERT E ,  DEEG EMIL W

    IPC: G02C7/02 ,  C03C3/076 ,  C03C3/095 ,  C03C21/00 ,  G02B1/00 ,  C03C3/04

    Abstract: An ophthalmic glass lens having a compressively stressed surface zone after ion exchanging which is at least 60 micrometers in depth can be formed from an alkali metal oxide silicate glass comprising by weight about 4 to about 15 percent sodium oxide, about 3 to about 15 percent potassium oxide provided the total amount of sodium, potassium and other alkali metal oxides is up to about 20 percent and about 3 to about 15 percent lanthanum oxide. The ion exchange process can take place at a temperature either above or below the strain point of conventional ophthalmic crown glass to produce satisfactory physical properties in the ophthalmic glass lens.

    HIGH STRENGTH OPHTHALMIC LENS
    9.
    发明专利
    HIGH STRENGTH OPHTHALMIC LENS 未知

    公开(公告)号：CA1090580A

    公开(公告)日：1980-12-02

    申请号：CA271752

    申请日：1977-02-14

    Applicant: AMERICAN OPTICAL CORP

    Inventor： KROHN DAVID A ,  GRAF ROBERT E ,  DEEG EMIL W

    IPC: C03C3/097 ,  C03C21/00

    Abstract: HIGH STRENGTH OPHTHALMIC LENS An ophthalmic glass lens having a compressivelystressed surface zone after ion exchanging which is at least 120 microns in depth, formed from an alkali metal oxide silicate glass comprising by weight about 4 to about 15 percent sodium oxide and about 3 to about 15 percent potassium oxide. There is a compressivelystressed surface layer having a strength of at least 25,000 psi. The total amount of sodium, potassium and other alkali metal oxides is up to about 20 percent. The total amount of zinc oxide, lanthanum oxide, magnesium oxide, and calcium oxide is about 8 to 15 percent, and these is about 3 to about 15 percent phosphorus pentoxide. An ion exchange process takes place at a temperature either above or below the strain point of conventional ophthalmic crown glass to produce satisfactory physical properties in the ophthalmic glass lens.

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