发明名称 |
DIFFRACTION-TYPE MULTIFOCAL OPHTALMIC LENS AND MANUFACTURING METHOD THEREFOR |
摘要 |
Provided is a diffraction-type multifocal ophthalmic lens for which halos are reduced. Also provided is a diffraction-type multifocal ophthalmic lens having three or more focal points, which is implemented on the basis of the discovery that the diffraction-type multifocal ophthalmic lens has a characteristic whereby multiple focal points can be generated in the intermediate region as well as the near and far regions. Also provided is a method for manufacturing a diffraction-type multifocal ophthalmic lens which provides a simple design and manufacturing method by means of a simple diffraction structure and by replacing a cumbersome computer simulation with a simple method. This diffraction-type multifocal ophthalmic lens has a diffraction structure (20) where a plurality of diffraction zones are formed concentrically on the lens (10), and an equal-pitch region is provided where pitches of at least two zones among the diffraction zones are made equal. |
申请公布号 |
EP2813881(B1) |
申请公布日期 |
2016.07.06 |
申请号 |
EP20120867865 |
申请日期 |
2012.02.09 |
申请人 |
MENICON CO., LTD. |
发明人 |
ANDO, ICHIRO;SUZUKI, HIROAKI;KOBAYASHI, ATSUSHI |
分类号 |
G02C7/06;A61F2/16;A61L27/00;G02B5/18;G02C7/04 |
主分类号 |
G02C7/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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