Ophthalmic lens with locally variable index of refraction and method of
making same
    21.
    发明授权
    Ophthalmic lens with locally variable index of refraction and method of making same 失效
    具有局部可变折射率的眼科镜片及其制作方法

    公开(公告)号:US4073579A

    公开(公告)日:1978-02-14

    申请号:US694428

    申请日:1976-06-09

    CPC classification number: G02C7/041 C03C23/008

    Abstract: Ophthalmic lenses with locally variable indices of refraction produced from microporous glass bodies diffused with inorganic salts and rendered transparent by heat treatment. Local variations in refractive index result from differences in concentrations of the salts produced by controlled diffusion and/or selective leaching after impregnation of the porous bodies.

    Abstract translation: 具有局部可变折射率的眼镜片,由微孔玻璃体产生,无机盐分散,并通过热处理呈透明状态。 折射率的局部变化是由多孔体浸渍后的受控扩散和/或选择性浸出产生的盐的浓度差异引起的。

    Method of making hardened ophthalmic lenses by ion exchange
    23.
    发明授权
    Method of making hardened ophthalmic lenses by ion exchange 失效
    通过离子交换制备硬化眼镜片的方法

    公开(公告)号:US4036623A

    公开(公告)日:1977-07-19

    申请号:US611383

    申请日:1975-09-08

    CPC classification number: C03C21/002 C03C3/078 C03C3/087 Y10S501/903

    Abstract: Ophthalmic lenses formed of ophthalmic glass and having accurately finished front and back curved surfaces and edged to the shapes desired are heated in molten salt bath and ion-exchange hardened on all surfaces thereof so as to satisfy high safety standards while being substantially free from optical image distortions for objects viewed therethrough. The invention includes method and apparatus for rapid and controlled pre-heating, soaking and cooling steps of lenses relatively cheaply and in sizable numbers at the same time.

    Abstract translation: 由眼镜玻璃形成并具有准确完成的前后弯曲表面并且形成所需形状的眼镜片在熔融盐浴中加热并在其所有表面上进行离子交换硬化,以满足高安全性标准,同时基本上不含光学图像 通过其观察的物体的变形。 本发明包括相对便宜且相当数量的镜片的快速和可控的预热,浸泡和冷却步骤的方法和装置。

    Ion exchangeable segment glass
    24.
    发明授权
    Ion exchangeable segment glass 失效
    可离子交换玻璃

    公开(公告)号:US3997249A

    公开(公告)日:1976-12-14

    申请号:US625963

    申请日:1975-10-28

    Abstract: There is disclosed an ion exchange-strengthened ophthalmic segment glass suitable for the fabrication of fused bifocal and trifocal ophthalmic lenses. More particularly, there is disclosed a lanthanum-silicate based ophthalmic segment glass having indices of refraction of about 1.57 to about 1.65 which is suitable for chemical ion exchange strengthening so as to develop a compressively-stressed ion-exchanged surface layer having a depth of at least 60 micrometers.

    Abstract translation: 公开了一种适用于制造融合的双焦点和三焦点眼科镜片的离子交换强化眼科部分玻璃。 更具体地,公开了一种适用于化学离子交换强化的折射率为约1.57至约1.65的镧硅酸盐基眼镜片玻璃,以便开发出具有深度为的深度的压缩应力离子交换表面层 至少60微米。

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