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    • 1. 发明授权
    • Eyeglass lenses for persons suffering from severe ametropia
    • 用于患有严重屈光不正的人的眼镜镜片
    • US4561736A
    • 1985-12-31
    • US518380
    • 1983-07-29
    • Gerhard FurterHans Lahres
    • Gerhard FurterHans Lahres
    • B24B13/00G02C7/02G02B3/04
    • B24B13/00G02C7/02
    • Eyeglass lenses for persons suffering from severe ametropia. The lenses have a convexly shaped object-side front surface (4) and an eye-side rear surface (3) which is aspherically corrected in the central region (6) which comprises at least the main field of view. From this region the rear surface passes into a region in which its meridional inclination approaches the inclination of the front surface. The entire rear surface of the lens is continuously differentiable twice. Such a lens has an appearance which is fully satisfactory esthetically and makes it possible to keep the overall magnification of the system consisting of the eye and the eyeglass lens closer to 1 than in the case of previously known lenses. Aberrations are optimally corrected within a sufficiently large region, and no disturbing discontinuities in the fields of view occur.
    • 用于患有严重屈光不正的人的眼镜镜片。 这些透镜具有凸起形状的物体侧前表面(4)和在中心区域(6)中非球面校正的眼睛侧后表面(3),其至少包括主视场。 从该区域,后表面进入其子午倾斜接近前表面倾斜的区域。 透镜的整个后表面连续可微分两次。 这样的透镜具有美观的外观,并且使得可以将由眼睛和眼镜镜片组成的系统的整体放大率保持在比以前已知的透镜的情况下更接近1。 畸变在足够大的区域内被最佳地校正,并且在视场中没有发生干扰的不连续性。
    • 3. 发明授权
    • Multi-focal spectacle lens having at least one progressive surface
    • 具有至少一个渐进面的多焦点眼镜镜片
    • US4786160A
    • 1988-11-22
    • US859695
    • 1986-05-05
    • Gerhard Furter
    • Gerhard Furter
    • G02C7/06G02C7/02
    • G02C7/065G02C7/061G02C7/066
    • The invention contemplates a multi-focal spectacle lens having two progressive zones which are spatially separated from each other and which provide smooth transition of dioptric power, from one to the next of three different viewing-distance regions. This progressive surface is calculated in accordance with the technique of spline analaysis and is twice continuously differentiable. Such a progressive lens, which is illustratively described for use at computer-screen work stations, has an upper viewing-distance region designed for distant vision, a middle viewing-distance region designed for viewing the computer screen as well as a document arranged alongside the screen, and a lower viewing-distance region designed for near-vision requirements of keyboard operation. Laterally of the near-vision region the power of the lens decreases so that documents lying to the side of the keyboard can also be seen sharply, without moving one's head.
    • 本发明考虑了一种多焦点眼镜镜片,其具有两个渐进区域,这两个渐进区域在空间上彼此分离,并且提供从三个不同观看距离区域中的一个到下一个的平滑过渡的屈光度。 这种渐进式表面是根据花键分析技术计算的,并且是连续两次可微分的。 示例性地描述用于计算机屏幕工作站的这种渐进透镜具有为远视设计的上观看距离区域,设计用于观看计算机屏幕的中间视距区域以及沿着 屏幕,以及设计用于键盘操作的近视需求的较低视距区域。 在近视区域中,透镜的功率减小,使得躺在键盘侧面的文档也可以被清楚地看到,而不用移动头部。