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LENTILLE MULTIFOCALE À DIFFRACTION ET PROCÉDÉ DE FABRICATION ASSOCIÉ
专利权人:
MENICON CO.; LTD.
发明人:
申请号:
EP12867865.3
公开号:
EP2813881B1
申请日:
2012.02.09
申请国别(地区):
EP
年份:
2016
代理人:
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.
来源网站:
中国工程科技知识中心
来源网址:
http://www.ckcest.cn/home/

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