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LENTILLE OPHTALMIQUE DIFFRACTIVE MULTIFOCALE UTILISANT UN ORDRE DIFFRACTIF SUPPRIMÉ
专利权人:
Novartis AG
发明人:
申请号:
EP17176212.3
公开号:
EP3242154A1
申请日:
2015.01.28
申请国别(地区):
EP
年份:
2017
代理人:
摘要:
A multifocal ophthalmic lens includes an ophthalmic lens and a diffractive element. The ophthalmic lens having an anterior surface and a posterior surface; and the diffractive element disposed on at least one of the anterior surface and the posterior surface, the diffractive element including a plurality of annular diffractive steps and four consecutive diffractive orders. The ophthalmic lens produces a near focus, an intermediate focus, and a distance focus each corresponding to a different one of the four consecutive diffractive orders; and the plurality of annular diffractive steps of the diffractive element are configured such that one of the four diffractive orders is suppressed and at least a portion of the energy associated with that suppressed diffractive order is redistributed to one of the near focus, the intermediate focus, and the distance focus.
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