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LENTE OFTÁLMICA DE DIFRAÇÃO MULTIFOCAL COM UMA ORDEM DE DIFRAÇÃO SUPRIMIDA
专利权人:
NOVARTIS AG
发明人:
YUEAI LIU,MYOUNG-TAEK CHOI,XIN HONG
申请号:
PT15152911
公开号:
PT2945009T
申请日:
2015.01.28
申请国别(地区):
PT
年份:
2017
代理人:
摘要:
A multifocal ophthalmic lens includes an ophthalmic lens (100) and a diffractive element (102). The ophthalmic lens has a base curvature corresponding to a base power. The diffractive element produces constructive interference in at least four consecutive diffractive orders corresponding a range of vision between near and distance vision. The constructive interference produces a near focus, a distance focus corresponding to the base power of the ophthalmic lens, and an intermediate focus between the near focus and the distance focus. A diffraction efficiency of at least one of the diffractive orders is suppressed to less than ten percent.
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