Is a
Patent attributes
Patent Applicant
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Myoung-Taek Choi0
Xin Hong0
Yueai Liu0
Date of Patent
October 1, 2019
Patent Application Number
15363398
Date Filed
November 29, 2016
Patent Citations Received
Patent Primary Examiner
Patent abstract
A method and system provide a multifocal ophthalmic device. The ophthalmic lens has an anterior surface, a posterior surface and at least one diffractive structure including a plurality of echelettes. The echelettes have at least one step height of at least one wavelength and not more than two wavelengths in optical path length. The diffractive structure(s) reside on at least one of the anterior surface and the posterior surface. The diffractive structure(s) provide a plurality of focal lengths for the ophthalmic lens.
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