B - Operations – Transporting – 23 – K
Patent
B - Operations, Transporting
23
K
B23K 26/36 (2006.01) B23K 26/38 (2006.01) B29D 11/00 (2006.01) G02C 7/04 (2006.01)
Patent
CA 2612023
A method of providing a feature on a contact lens including applying a femtosecond laser beam to ablate at least a portion of the contact lens to provide the feature on the contact lens. In one embodiment, the femtosecond laser beam has a pulse width between 10x10-15 seconds and 200x10-15 seconds, and has a wavelength between 100 nm and 1500 nm. A contact lens is also provided including at least one fenestration fluidically connecting the anterior surface and the posterior surface, the fenestration being formed using a femtosecond laser in a manner that areas surrounding the fenestration are substantially free of heat damage.
L'invention porte sur un procédé destiné à conférer une caratéristique à une lentille de contact, lequel procédé consiste à appliquer un faisceau laser femtoseconde pour effectuer l'ablation d'au moins une partie de la lentille de contact et conférer la caractéristique à la lentille de contact. Dans un mode de réalisation, le faisceau laser femtoseconde possède une largeur d'impulsion comprise entre 10x10-15 secondes et 200x10-15 secondes, et une longueur d'onde comprise entre 100 nm et 1500 nm. L'invention se rapporte aussi à une lentille de contact comprenant au moins une perforation reliant de manière fluidique la surface antérieure à la surface postérieure, la perforation étant formée au moyen d'un laser femtoseconde de manière que les zones entourant la perforation ne présentent sensiblement pas de dommages thermiques.
Erickson Paul M.
Kunzler Jay F.
Salamone Joseph C.
Bausch & Lomb Incorporated
Osler Hoskin & Harcourt Llp
LandOfFree
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