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    HIGH STRENGTH OPHTHALMIC LENS
    11.
    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.

    ION EXCHANGE-STRENGTHENED SILICATE GLASS FILTER FOR ULTRAVIOLET LIGHT
    12.
    发明专利
    ION EXCHANGE-STRENGTHENED SILICATE GLASS FILTER FOR ULTRAVIOLET LIGHT 未知

    公开(公告)号：CA1084711A

    公开(公告)日：1980-09-02

    申请号：CA260455

    申请日：1976-09-02

    Applicant: AMERICAN OPTICAL CORP

    Inventor： DEEG EMIL W

    IPC: C03C3/085 ,  C03C3/095 ,  C03C4/08 ,  C03C21/00 ,  G02B5/22

    Abstract: ION EXCHANGE-STRENGTHENED SILICATE GLASS FILTER FOR ULTRAVIOLET LIGHT There is provided by the process of the invention a silicate glass which provides protection against mechanical hazards and short and long wavelength ultraviolet radiation while at the same time high transmission of light in the visible range of the spectrum is maintained. By the process of the invention, the is corporation of cerium oxide into the glass followed by ion exchange strengthening using a mixture of potassium salt and silver nitrate provide a synergistic reduction in transmission of light in the ultraviolet range of the spectrum not heretofore obtainable by the use of either cerium oxide or silver staining of the glass alone.

    METHOD OF MAKING ARTIFICIAL INTRAOCULAR LENSES
    13.
    发明专利
    METHOD OF MAKING ARTIFICIAL INTRAOCULAR LENSES 未知

    公开(公告)号：CA1082922A

    公开(公告)日：1980-08-05

    申请号：CA265810

    申请日：1976-11-16

    Applicant: AMERICAN OPTICAL CORP

    Inventor： DEEG EMIL W ,  KROHN DAVID A

    IPC: A61F2/16 ,  C03B19/02 ,  C03B23/22 ,  C03C27/02 ,  B29D11/00

    Abstract: METHOD OF MAKING ARTIFICIAL INTRACCULAR LENSES Making perforate optical sections (lenses) of pseudophakol with avoidance of drilling operations and adversities thereof. Lens material is cast over wires corresponding in diametral size and relative juxtaposition to the size and spaced locations of holes needed in a lens and the wires are etched away prior to or following final edging and surface finishing of the lens. The casting of multiple lens preforms is contemplated.

    16.
    发明专利
    未知

    公开(公告)号：DE2625313A1

    公开(公告)日：1977-01-20

    申请号：DE2625313

    申请日：1976-06-03

    Applicant: AMERICAN OPTICAL CORP

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

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

    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.

    Shock and scratch resistant lenses - by use of a heat hardening organic polysiloxane
    17.
    发明专利
    Shock and scratch resistant lenses - by use of a heat hardening organic polysiloxane 未知

    公开(公告)号：FR2309889A1

    公开(公告)日：1976-11-26

    申请号：FR7601520

    申请日：1976-01-21

    Applicant: AMERICAN OPTICAL CORP

    Inventor： DEEG EMIL W ,  GAUTHIER M JACQUELINE

    IPC: G02C7/10 ,  A61F9/02 ,  G02C7/02 ,  B29D11/00 ,  G02C1/00

    Abstract: Eye protection consists of s spectacle frame and a lens which possesses high shock and scratch resistance. The lens is a heat hardening reaction prodt. of a vinyl terminated org. polysiloxane and an org. polysiloxane contg. Me-H-siloxane gps. The frame is of cellulose nitrate, acetate or acetate butyrate. The org. polysiloxane prepolymers are mixed with a Pt catalyst, poured into a mould and heated to 50-150 degrees C to crosslink. The org. polysiloxane lens may be incorporated into the plastic frame using an epoxide, or contact adhesive from high mol. wt. dimethyl siloxane. A lens may be held by friction force in a metal or plastic frame and made into a one piece unit by coating the whole with an org., optically clear catalysed polysiloxane which is crosslinked as above. The lens may also be prepd. from an inorganic oxide glass or from polycarbonate, diethyleneglycol-bis(allylcarbonate) or polymethyl methacrylate, and coated with the organic siloxane. The polymer coating may contain a fumed silica filter. The lenses are resistant to scratching with a diamond pencil, and are not broken by flying objects. Inorganic oxide glass lenses, coated with the organic polysiloxane are less reflecting. Good mould release is obtained with the polysiloxane catalyst combination.

    PREPARATION OF PHOTOCHROMIC SILVER HALIDE GRADIENT LENSES OF COSMETICALLY IMPROVED COLOUR CONTAINING COBALT (II) OXIDE
    18.
    发明专利
    PREPARATION OF PHOTOCHROMIC SILVER HALIDE GRADIENT LENSES OF COSMETICALLY IMPROVED COLOUR CONTAINING COBALT (II) OXIDE 未知

    公开(公告)号：CA1105760A

    公开(公告)日：1981-07-28

    申请号：CA271864

    申请日：1977-02-15

    Applicant: AMERICAN OPTICAL CORP

    Inventor： KROHN DAVID A ,  DEEG EMIL W

    IPC: C03C4/06 ,  C09K9/00 ,  G02C7/10 ,  G02B5/23

    Abstract: AO-3067 PREPARATION OF PHOTOCHROMIC GRADIENT LENSES OF COSMETICALLY IMPROVED COLOR Glass lenses, or lens blanks, containing all the ingredients necessary to produce phototropic, or photochromic, behavior, are treated in a conventional production furnace to produce a locally variable heat treatment, wherein at least one portion thereof is raised to a temperature exceeding the glass strain point but not the softening point, and other portions are heated to variable temperature decreasing from the strain point. The treatment causes development of phototropic, or photochromic, behavior only in those portions of the lenses, or lens blanks, exposed to the temperature above the strain point. The lenses resulting are characterized by trichromatic coeffioients, x=0.306 and y=0.307, in the unactivated state and x-0.324 and y=00321, in an activated state and including a small but effective quantity of cobalt oxide.

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