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:
Feb. 18, 2020
Filed:
Oct. 01, 2015
Applicant:
Menicon Co., Ltd., Nagoya-shi, Aichi, JP;
Inventor:
Ichiro Ando, Kasugai, JP;
Assignee:
MENICON CO., LTD., Nagoya, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02C 7/06 (2006.01); G02C 7/04 (2006.01);
U.S. Cl.
CPC ...
G02C 7/06 (2013.01); G02C 7/044 (2013.01); G02C 2202/20 (2013.01);
Abstract
The present invention pertains to a diffractive multi-focal ophthalmic lens, and the purpose is to provide a novel structure and manufacturing method in which improvement in optical characteristics such as halo reduction is obtained. A diffractive multi-focal ophthalmic lens in which a plurality of focal points are set by a diffraction grating comprising a blaze shaped phase function in which a plurality of zone sequences are overlapped, wherein adopted is a structure expressed by a phase function in which an inclination of a blaze of a specific adjustment zone in a standard profile is reversed.