Invention Grant
US09022565B2 Method and apparatus for checking the centering of spectacles worn by a spectacle wearer 有权
用于检查由眼镜佩戴者佩戴的眼镜的对中的方法和装置

Method and apparatus for checking the centering of spectacles worn by a spectacle wearer
Abstract:
A method and an apparatus serve for checking the centering of spectacles worn by a spectacle wearer. The method comprises the steps of: a) measuring spectacle lenses mounted in a frame of the spectacles, wherein a position of permanent markings on the spectacle lenses is acquired relative to a coordinate system defined by the frame by means of an image recognition system; b) determining positions of nominal centering points, prescribed in a file, of the spectacle lenses in dependence on data of the spectacle lenses containing the position of the permanent markings; c) measuring physiological data of a spectacle wearer wearing the spectacles and determining positions of actual centering points of the spectacle lenses from the physiological data by means of a video centering instrument; d) determining the difference between the positions of the nominal centering points and the actual centering points; and e) comparing the difference to a prescribed difference threshold.
Information query
Patent Agency Ranking
0/0