会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 3. 发明授权
    • Multifocal ophthalmic lens
    • 多焦点眼科镜片
    • US6102544A
    • 2000-08-15
    • US342946
    • 1999-06-29
    • Thierry BaudartFrancoise AhsbahsChristian Miege
    • Thierry BaudartFrancoise AhsbahsChristian Miege
    • G02C7/02G02C7/06
    • G02C7/063G02C7/061
    • In a multifocal ophthalmic lens comprising an aspherical surface having at every point thereon a mean sphere and a cylinder, a far vision region, a near vision region, and an intermediate vision region, the length of progression i.e. the length over which lens power varies by a set amount in different regions of the lens, is short. To avoid distortion at the periphery of the lens which this would otherwise occasion, the isosphere and isocylinder lines are distributed over the surface of the lens so as to ensure variations in sphere are not too sudden along a 20 mm radius circle centered on the geometric center of the lens and variations in cylinder on the surface of the lens inside this circle are also very small. The lens has an enlarged near vision region and progression is less perceptible to the wearer.
    • 在包括非球面的多焦点眼镜片中,每个点上均具有平均球体和圆柱体,远视区域,近视区域和中间视觉区域,其进程长度即透镜功率变化的长度 在镜片的不同区域设定的量很短。 为了避免透镜外围的变形,否则会出现这种情况,同相和圆柱体线分布在透镜的表面上,以确保球体的变化不会沿着以几何中心为中心的20毫米半径圆 的透镜和该圆周内的透镜表面上的气缸的变化也非常小。 透镜具有放大的近视区域,并且进展对于佩戴者而言较不可察觉。