MULTIFOCAL OPHTHALMIC LENS WITH CHROMATIC ABERRATION CORRECTION Russian patent published in 2022 - IPC A61F2/16 G02C7/04 G02C7/06 

Abstract RU 2770314 C2

FIELD: ophthalmology.

SUBSTANCE: invention relates to the field of ophthalmology and concerns an ophthalmic lens. The ophthalmic lens contains an optical part having a front surface, a back surface and an optical axis. At least one of the front surface and the back surface has a surface profile having a base curvature, a refraction area having a base curvature, and a diffraction area containing a diffraction profile containing a set of diffraction stages. At least part of the diffraction profile is a combination of a basic diffraction profile, which forms several focal points for the ophthalmic lens, and an achromatizing structure, which reduces longitudinal chromatic aberrations.

EFFECT: improvement of the image in a wide range of white light and obtaining a more contrasting image on the retina.

12 cl, 11 dwg

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RU 2 770 314 C2

Authors

Wei, Xin

Hong, Xin

Dates

2022-04-15Published

2018-04-05Filed