Improved diffractive multifocal ophthalmic lens

Details Improved diffractive multifocal ophthalmic lens Improved diffractive multifocal ophthalmic lens

G - Physics

02

C

G02C 7/06 (2006.01) G02B 5/18 (2006.01)

Patent

CA 2238962

A diffractive, multifocal ophthalmic lens including an apodization zone with echelettes having a smoothly reduced step height to shift the energy balance from the near image to the distant image and thus reduce the glare perceived when viewing a discrete, distant light source.

Cette invention concerne un verre ophtalmique amélioré, multifocal et à diffraction, lequel possède une zone d'apodisation qui comprend des échelettes. Ces dernières possèdent des gradins dont la hauteur se réduit progressivement, ce qui permet de déplacer l'équilibre énergétique depuis une image proche vers une image lointaine, et de réduire ainsi l'éblouissement perçu lorsque l'on regarde une source de lumière discrète et distante.

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