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MULTIFOCAL LENS
专利权人:
Rayner Intraocular Lenses Limited
发明人:
Kirsten LUX,Nicole PLANK,Wolfgang BREZNA,Nikolaus DRAGOSTINOFF
申请号:
US16590698
公开号:
US20200030081A1
申请日:
2019.10.02
申请国别(地区):
US
年份:
2020
代理人:
摘要:
The invention relates to a multifocal lens (1) with a refractive focus (Fr) and with a diffractive structure (5) which, in the radial direction (r) of the lens (1), plotted across the squared radius (r2), has a periodic profile (6, 7, 8, 9), wherein the profile (6, 7, 8, 9) per period has four adjoining portions (6, 7, 8, 9) which are not differentiable at their connection sites (10, 11, 12, 13), wherein a first portion (9) has a monotonically falling function and the three further portions (6, 7, 8) have a monotonically rising function or vice versa, and wherein the further portion (7), which does not adjoin the first portion (9), has a greater pitch than the other further portions (6, 8).
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