US 11,029,536 B2Granted

Multifocal lens

AssigneeRayner Intraocular Lenses Limited

InventorsKirsten Lux, Nicole Plank, Wolfgang Brezna, Nikolaus Dragostinoff

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Abstract

The invention relates to a multifocal lens (1) with a refractive focus (Fr) and with a diffractive structure (5) which, in the radial direction (r) of the lens (1), plotted across the squared radius (r2), has a periodic profile (6, 7, 8, 9), wherein the profile (6, 7, 8, 9) per period has four adjoining portions (6, 7, 8, 9) which are not differentiable at their connection sites (10, 11, 12, 13), wherein a first portion (9) has a monotonically falling function and the three further portions (6, 7, 8) have a monotonically rising function or vice versa, and wherein the further portion (7), which does not adjoin the first portion (9), has a greater pitch than the other further portions (6, 8).

Claims6

Dependent claims

A multifocal lens with a refractive focal point (Fr) and a diffractive structure, the structure having a periodic profile in the radial direction (r) of the lens plotted over the squared radius (r2), and

the profile having four mutually adjacent portions per period which cannot be differentiated at their junctions,
the four portions including a first portion, a second portion, a third portion and a fourth portion, wherein the first portion is adjacent to the fourth portion and the second portion, and the third portion is adjacent to the second portion and fourth portion,
wherein the first portion falls monotonically and the second portion, the third portion, and the fourth portion each rise monotonically, or a first portion rises monotonically and the second portion, the third portion, and the fourth portion each fall monotonically, and
wherein the third portion has a steeper gradient than the second portion and the fourth portion, and wherein the period (p) of the profile, plotted over the squared radius, amounts to 0.5 mm2 to 1 mm2 and the profile depth (T) to 2 μm to 10 μm.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 16/590,698Filed 2 Oct 2019 · continuation
Priority: EP 151880452 Oct 2015
Published: US 2020/0030081 A130 Jan 2020
Granted: 8 Jun 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

A61F 2/1618
Pseudo-accommodative, e.g. multifocal or enabling monovision: multifocal lenses
A61F 2/1654
Having special lens configurations, e.g. multipart lenses; having particular optical properties, e.g. pseudo-accommodative lenses, lenses having…:…
G02B 3/08
With non-spherical faces: with discontinuous faces, e.g. Fresnel lens
G02B 5/1876
Diffraction gratings: diffractive Fresnel lenses; Zone plates; Kinoforms

Family

PCT/EP2016/073361Parent of this continuation · filed 29 Sep 2016
US 10,463,474 B2Parent of this continuation · filed 5 Nov 2019
US 2020/0030081 A1Pre-grant publication · published 30 Jan 2020
Application15/765,078Parent of this continuation
US 2018/0289469 A1Published application
US 11,029,536 B2This patent

From the US filing history. Foreign family members aren’t listed.

Timeline

Citations

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