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    Multifocal lens blanks
    1.
    发明授权
    Multifocal lens blanks 失效
    多焦点镜头毛坯

    公开(公告)号：US3874777A

    公开(公告)日：1975-04-01

    申请号：US35459973

    申请日：1973-04-26

    Applicant: AMERICAN OPTICAL CORP

    Inventor： DEEG EMIL W ,  CANTERBURY BRADFORD ,  SIMPSON ARNOLD J

    IPC: C03B11/08 ,  C03B19/02 ,  C03B23/22 ,  G02C7/06

    CPC classification number: G02C7/06 ,  C03B11/08 ,  C03B19/02 ,  C03B23/22 ,  C03B2215/406 ,  C03B2215/48 ,  C03B2215/49 ,  Y02P40/57

    Abstract: Casting a glass major portion of a multifocal lens blank over a glass segment portion of the blank or impressing the segment into the major portion during or immediately after casting. The glass for the major is selected to coincide in viscosity with the segment glass within a range of 105 to 109 poises at least at one temperature, and that above the crossover point the viscosity of the segment glass is higher than the viscosity of the major glass at the same temperature.

    Abstract translation: 将多焦点透镜毛坯的玻璃主要部分在坯料的玻璃片部分上铸造，或者在铸造期间或之后立即将片段压入主要部分。 选择主体的玻璃与片状玻璃的粘度在105至109泊的范围内至少在一个温度下重合，并且在交叉点上方，分段玻璃的粘度高于主玻璃的粘度 在相同的温度。

    Method and apparatus for producing tubing from short glasses
    3.
    发明授权
    Method and apparatus for producing tubing from short glasses 失效
    从短眼镜生产管材的方法和装置

    公开(公告)号：US3880634A

    公开(公告)日：1975-04-29

    申请号：US46348974

    申请日：1974-04-24

    Applicant: AMERICAN OPTICAL CORP

    Inventor： DEEG EMIL W ,  KROHN DAVID A ,  MARTEL LESLIE B

    IPC: C03B19/02 ,  C03B15/14

    CPC classification number: C03B19/02

    Abstract: Tubing of short glass is provided by casting the glass in a tubular mold under a vacuum. The basic principle of operation is similar to that utilized in the Torricelli barometer. That is, pressure on the surface of the melt forces the molten glass into a tubular mold to a height determined by the difference in pressure between the ambient over the surface of the melt and that remaining in the mold.

    Abstract translation: 通过在真空下在管状模具中浇铸玻璃来提供短玻璃的管道。 操作的基本原理类似于Torricelli气压计中使用的基本原理。 也就是说，熔体表面上的压力迫使熔融玻璃进入管状模具到由熔体表面和残留在模具中的环境之间的压力差确定的高度。

    MULTIFOCAL LENSES AND METHOD OF MAKING SAME
    9.
    发明专利
    MULTIFOCAL LENSES AND METHOD OF MAKING SAME 未知

    公开(公告)号：CA1044930A

    公开(公告)日：1978-12-26

    申请号：CA240269

    申请日：1975-11-24

    Applicant: AMERICAN OPTICAL CORP

    Inventor： DEEG EMIL W

    IPC: G02C7/06 ,  B24B13/00 ,  B29C43/00 ,  B29D11/00 ,  C03B11/08 ,  C03B17/02 ,  C03B23/03 ,  C03B23/22 ,  G02B3/10

    Abstract: MULTIFOCAL LENSES AND METHOD OF MAKING SAME A multifocal lens formed of laminated high and relatively low index thermoplastic ophthalmic lens materials. A flat laminate is slumped, pressed or otherwise formed to a spherically or aspherically meniscus shape so as to similarly shape the highlow refractive index interface of the laminate. Ocular and object surfaces of the multifocal lens are ground to preselected spherical and/or toric curvatures disposed in predetermined angular relationships and proximities to the interface and to each other according to particular multifocusing properties desired of the lens. Polishing of the surfaces and edging of the lens to a desired peripheral configuration completes the product.

    10.
    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.

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