Optical material and method for modifying the refractive index

A - Human Necessities – 61 – F

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A61F 9/008 (2006.01) A61F 9/00 (2006.01)

Patent

CA 2655229

A method for modifying the refractive index of an optical, polymeric material. The method comprises irradiating select regions of the optical, polymeric material with a focused, visible or near-IR laser having a pulse energy from 0.05 nJ to 1000 nJ. The irradiation results in the formation of refractive optical structures, which exhibit little or no scattering loss. The method can be used to modify the refractive index of an intraocular lens following the surgical implantation of the intraocular lens in a human eye. The invention is also directed to an optical device comprising refractive optical structures, which exhibit little or no scattering loss and are characterized by a positive change in refractive index.

La présente invention concerne un procédé pour modifier l'indice de réfraction d'un matériau optique à base de polymère. Le procédé comprend l'irradiation de zones sélectionnées du matériau optique à base de polymère avec un laser de lumière visible ou infrarouge focalisée ayant une énergie d'impulsions comprise entre 0,05 nJ et 1000 nJ. L'irradiation entraîne la formation de structures optiques de réfraction, qui présentent peu ou pas de perte par dispersion. Le procédé peut être utilisé pour modifier l'indice de réfraction d'une lentille intraoculaire suite à l'implantation chirurgicale de la lentille intraoculaire dans l'oeil humain. L'invention concerne également un dispositif comportant des structures optiques de réfraction, qui présentent peu ou pas de perte par dispersion et sont caractérisées par une modification positive dans l'indice de réfraction.

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