The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 08, 2021
Filed:
Oct. 02, 2019
Rayner Intraocular Lenses Limited, West Sussex, GB;
Kirsten Lux, Mödling, AT;
Nicole Plank, Forchtenstein, AT;
Wolfgang Brezna, Wiener Neustadt, AT;
Nikolaus Dragostinoff, Vienna, AT;
RAYNER INTRAOCULAR LENSES LIMITED, West Sussex, GB;
Abstract
The invention relates to a multifocal lens () with a refractive focus (F) and with a diffractive structure () which, in the radial direction (r) of the lens (), plotted across the squared radius (r), has a periodic profile (), wherein the profile () per period has four adjoining portions () which are not differentiable at their connection sites (), wherein a first portion () has a monotonically falling function and the three further portions () have a monotonically rising function or vice versa, and wherein the further portion (), which does not adjoin the first portion (), has a greater pitch than the other further portions ().