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1. 发明授权

US5428448A Method and apparatus for non-contact digitazation of frames and lenses 失效
标题翻译：框架和透镜非接触式数字化的方法和装置
公开(公告)号：US5428448A
公开(公告)日：1995-06-27
申请号：US139936
申请日：1993-10-20
申请人： Pablo Albert-Garcia
发明人： Pablo Albert-Garcia
IPC分类号： G01B11/24 , G01B11/255 , G02C13/00
CPC分类号： G02C13/003 , G01B11/2433 , G01B11/255
摘要： A method and apparatus for determining the size and shape to which a finished lens used to make an eyeglass lens is to be cut. Coordinates which define the outer perimeter of a lens are determined by illuminating either an eyeglass frame or a lens. An image of the shadow of the frame or lens is captured by an imaging device. A first linear polarizing filter is positioned optically between a light source and the membrane. A second linear polarizing filter, oriented at 180.degree. from the first filter, is placed optically between the membrane and the camera. Thus, the first and second polarizing filters allow a high definition image to be attained for substantially transparent plastic. A general purpose computer: (1) identifies the edges of the image so as to define the perimeter; (2) orients the image by identifying an orientation line placed upon a lens, if the image is of a lens which is not within a frame; and (3) measures the distance between lenses if an eyeglass frame is being measured. If an eyeglass frame is being measured, then a depth gauge indicator is used to measure the depth of a groove in the frame into which a lens is recessed when mounted in the eyeglass frame. Once the coordinates of the lens are determined, they may be verified by comparison with the frames or lens from which they were derived. Further, the coordinates of the outer perimeter of the edged lens may be determined to verify the accuracy of the operation.
摘要翻译：用于确定用于制造眼镜镜片的成品透镜的尺寸和形状的方法和装置将被切割。通过照射眼镜架或镜片来确定限定镜片外周的坐标。由成像装置拍摄框架或透镜的阴影的图像。第一线性偏振滤光器光学地定位在光源和膜之间。从第一个过滤器180度定向的第二个线性偏振滤光器被光学地放置在膜和照相机之间。因此，第一和第二偏振滤光器允许为基本透明的塑料获得高清晰度图像。通用计算机：（1）识别图像的边缘以定义周边; （2）如果图像是不在框架内的透镜，则通过识别放置在透镜上的取向线来定向图像; 和（3）如果正在测量眼镜架，则测量镜片之间的距离。如果正在测量眼镜框架，则使用深度计指示器来测量当安装在眼镜架中时镜片凹入的框架中的凹槽的深度。一旦确定了透镜的坐标，它们可以通过与从其导出的框架或透镜进行比较来验证。此外，可以确定边缘透镜的外周的坐标以验证操作的准确性。

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