Invention Grant
- Patent Title: Multifocal lens
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Application No.: US16590698Application Date: 2019-10-02
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Publication No.: US11029536B2Publication Date: 2021-06-08
- Inventor: Kirsten Lux , Nicole Plank , Wolfgang Brezna , Nikolaus Dragostinoff
- Applicant: Rayner Intraocular Lenses Limited
- Applicant Address: GB West Sussex
- Assignee: Rayner Intraocular Lenses Limited
- Current Assignee: Rayner Intraocular Lenses Limited
- Current Assignee Address: GB West Sussex
- Agency: Johnson, Marcou, Isaacs & Nix, LLC
- Agent Paul J. Roman, Jr.
- Priority: EP15188045 20151002
- Main IPC: G02C7/04
- IPC: G02C7/04 ; A61F2/16 ; G02B5/18 ; G02B3/08

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).
Public/Granted literature
- US20200030081A1 MULTIFOCAL LENS Public/Granted day:2020-01-30
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