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    52.
    发明专利
    未知

    公开(公告)号：FR2617763A1

    公开(公告)日：1989-01-13

    申请号：FR8709619

    申请日：1987-07-07

    Applicant: ESSILOR INT

    Inventor： BOURSET CLAUDE ,  WAJS GEORGES

    IPC: B29C35/12 ,  B29D11/00 ,  B29K96/00 ,  B29L11/00 ,  G02C7/04

    Abstract: In this method of manufacturing a flexible contact lens from a protein biological material, such as a protein polymer of the gelatine type or a type IV enriched human collagen, a hydrogel is first made by hydrating the protein biological material, in water or a physiological serum. A lens preform is then made from the hydrogel at a temperature between ambient temperature and the temperature at which the material liquefies, at which temperature the hydrogel has a paste-like consistency. This preform, which reproduces the shape of the finished lens with a greater or lesser degree of accuracy, but always with excess material, is then placed in a mold made from a low-loss dielectric material. The mold is in at least two parts which, when locked together, define a three-dimensional shape and a finished lens surface state. The hydrogel is then liquefied by irradiating the mold with an electromagnetic field at a frequency between 108 and 1010 Hz. The parts of the mold are then locked together and the hydrogel is then gelified by cooling it in the mold. Finally, the hydrogel is then removed from the mold and is cross-linked by contact with a cross-linking agent such as an aldehyde. The resulting lenses have excellent shape and surface state characteristics and are very well tolerated biologically.

    53.
    发明专利
    未知

    公开(公告)号：FR2565160B1

    公开(公告)日：1987-03-06

    申请号：FR8408710

    申请日：1984-06-04

    Applicant: ESSILOR INT

    Inventor： WAJS GEORGES

    IPC: B29D11/00 ,  G02B1/04 ,  B29C35/04

    Abstract: A starting solution comprising one or more noncrystalline natural proteinaceous polymers of animal or vegetable origin is molded and gelled in a lens shaped mold and then removed from the mold. Thereafter the gel is crosslinked by immersion in a liquid containing a crosslinking agent.

    DISPOSITIF POUR LA REGENERATION D'UNE SOLUTION DEGRADABLE
    54.
    发明专利
    DISPOSITIF POUR LA REGENERATION D'UNE SOLUTION DEGRADABLE 未知

    公开(公告)号：CA1192290A

    公开(公告)日：1985-08-20

    申请号：CA426371

    申请日：1983-04-21

    Applicant: ESSILOR INT

    Inventor： TAGNON LUC ,  WAJS GEORGES

    IPC: A61B18/20 ,  A61F9/00 ,  G01N21/75 ,  G01N21/85 ,  H01S3/02 ,  H01S3/113 ,  E03B7/07

    Abstract: Ce dispositif est du genre comportant un circuit de circulation sur lequel se trouve notamment en série une cuve, propre à contenir la solution concernée, et une pompe, propre à l'entrainement de celle-ci, avec, branché en un point de ce circuit de circulation, un circuit propre à permettre, sous la commande de moyens de vannage, l'injection, dans le circuit de circulation, d'une solution de concentration supérieure à celle présente dans ce circuit de circulation. Suivant l'invention, ce circuit comporte un flacon formant vase d'expansion ou vase de recueil, en sorte qu'il constitue un circuit de régénération. Application, notamment, aux solutions d'absorbant saturable pour laser.

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