Title:
DIFFRACTIVE MULTIFOCAL LENS FOR EYE AND METHOD FOR MANUFACTURING DIFFRACTIVE MULTIFOCAL LENS FOR EYE
Document Type and Number:
WIPO Patent Application WO/2017/138099
Kind Code:
A1
Abstract:
In a diffractive multifocal lens for the eye, which can generate a plurality of light energy peaks on an optical axis for a plurality of focal points, the purpose of the present invention is to achieve a diffractive multifocal lens with a novel constitution wherein specific light energy peaks can be reduced or substantially eliminated.
Provided is a diffractive multifocal lens with a diffractive structure having a phase profile in which a plurality of blaze-shaped zones are established in a concentric circular shape, wherein: at least one of the zones is set as an adjustment zone wherein the direction of inclination in the phase profile is the opposite of other zones; and the light intensity level that gives a peak or focal point at a position outside of three focal points in the light intensity distribution for light transmitted in the direction of the optical axis is kept lower in comparison to a constitution without the adjustment zone.
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Inventors:
ANDO ICHIRO (JP)
Application Number:
PCT/JP2016/053874
Publication Date:
August 17, 2017
Filing Date:
February 09, 2016
Export Citation:
Assignee:
MENICON CO LTD (JP)
International Classes:
G02C7/02; G02B5/18; G02C7/04
Domestic Patent References:
WO2014189049A1 | 2014-11-27 | |||
WO2014091528A1 | 2014-06-19 | |||
WO2013118176A1 | 2013-08-15 | |||
WO2013118499A1 | 2013-08-15 | |||
WO2013118176A1 | 2013-08-15 |
Foreign References:
JP2012517625A | 2012-08-02 | |||
JP2010158315A | 2010-07-22 | |||
JP2013517822A | 2013-05-20 | |||
JP2014071113W | 2014-08-08 | |||
JP2001042112A | 2001-02-16 |
Other References:
See also references of EP 3415980A4
Attorney, Agent or Firm:
KASAI & NAKANE INTERNATIONAL PATENT FIRM et al. (JP)
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