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热词
    • 4. 发明授权
    • Apparatus and method for inspecting a test lens, method of making a test
lens
    • 用于检查测试透镜的装置和方法,以及制造测试透镜的方法
    • US5303023A
    • 1994-04-12
    • US941367
    • 1992-09-04
    • Valdemar PortneyPaul W. Bolton
    • Valdemar PortneyPaul W. Bolton
    • G01M11/02G01M11/00
    • G01M11/0264G01M11/0242G01M11/0285
    • An apparatus for inspecting a test lens, such as an intraocular lens, comprising a light source and collimating lens positioned to receive light from the light source and direct collimated light to the test lens. A plurality of targets are positionable at the object focal plane of the collimating lens so that there is an image of the target at the image focal space of the test lens. The image of the target has generally radially extending and alternating first and second sectors with each of the first sectors being relatively light and each of the second sectors being relatively dark. Modulation transfer function is determined by determining the image contrast along a combination of selected ring-shaped regions of the image.
    • 一种用于检查诸如眼内透镜的测试透镜的装置,包括光源和准直透镜,其被定位成接收来自光源的光并将准直光直接导向测试透镜。 多个目标可定位在准直透镜的物体焦平面处,使得在测试透镜的图像焦点空间处存在目标的图像。 目标的图像具有大致径向延伸且交替的第一和第二扇区,其中每个第一扇区相对较浅,并且每个第二扇区相对较暗。 通过沿图像的选定环形区域的组合确定图像对比度来确定调制传递函数。