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Title:
DIFFRACTIVE MULTI-FOCAL OCULAR LENS AND METHOD FOR MANUFACTURING DIFFRACTIVE MULTI-FOCAL OCULAR LENS
Document Type and Number:
WIPO Patent Application WO/2017/056305
Kind Code:
A1
Abstract:
The present invention pertains to a diffractive multi-focal ocular lens, and the purpose is to provide a novel structure and manufacturing method in which improvement in optical characteristics such as halo reduction is ensured. A diffractive multi-focal ocular lens in which a plurality of focal points have been set by a diffraction grating composed of blazed phase functions in which a plurality of zone sequences are superimposed, wherein a structure is used in which the slope of a blaze of a specific adjustment zone in a reference profile is expressed by an inverse phase function.

Inventors:
ANDO ICHIRO (JP)
Application Number:
PCT/JP2015/077999
Publication Date:
April 06, 2017
Filing Date:
October 01, 2015
Export Citation:
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Assignee:
MENICON CO LTD (JP)
International Classes:
G02C7/06; G02C7/04
Domestic Patent References:
WO2010079528A12010-07-15
WO2013118499A12013-08-15
WO2014091528A12014-06-19
Foreign References:
JP2012517625A2012-08-02
JP2013517822A2013-05-20
JP2009526275A2009-07-16
JP2014228660A2014-12-08
US20120224138A12012-09-06
US20090268155A12009-10-29
Other References:
See also references of EP 3358395A4
Attorney, Agent or Firm:
KASAI, YOSHITAKA et al. (JP)
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