G - Physics – 02 – C
Patent
G - Physics
02
C
G02C 7/04 (2006.01) G02C 7/06 (2006.01)
Patent
CA 2722274
The present invention provides improved ophthalmic lenses and methods for their design and use. Monofocal and multifocal diffractive ophthalmic lenses having reduced light scatter, improved light energy distribution properties, and/or other improvements in optical performance are provided. These properties are provided, at least in part, by the diffractive profiles of the invention, often having subtlety shaped echelettes with appropriately curving profiles. Smooth diffractive profiles may be used reduce light scatter. Diffractive profiles may be configured to limit the light energy in certain selected orders, thereby improving viewing quality and mitigating unwanted effects such as dysphotopsia. Diffractive profiles of may additionally or alternatively vary the light energy distributed between individual echelettes, providing additional advantages in various viewing situations.
La présente invention porte sur des lentilles ophtalmiques améliorées ainsi que sur des procédés de conception et dutilisation de celles-ci. Linvention concerne des lentilles ophtalmiques diffractives monofocales et multifocales possédant des propriétés de dispersion lumineuse réduite et de répartition d'énergie lumineuse améliorée, et/ou dautres améliorations quant à la performance optique. Lesdites propriétés proviennent, au moins en partie, des profils de diffraction selon linvention, qui possèdent souvent des échelettes subtilement formées et des profils de courbure appropriés. Lutilisation de profils de diffraction lisses permet de réduire la dispersion de la lumière. Les profils de diffraction peuvent être conçus de manière à limiter lénergie lumineuse selon certains ordres choisis, permettant ainsi daméliorer la qualité de la vision et datténuer les effets indésirables, et notamment la dysphotopsie. Les profils de diffraction de linvention permettent, en outre ou en variante, de faire varier lénergie lumineuse répartie entre les échelettes individuelles, procurant ainsi des avantages supplémentaires dans diverses situations liées à la vision.
Amo Regional Holdings
Gowling Lafleur Henderson Llp
LandOfFree
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