Lens grinding apparatus
AssigneeNidek Co., Ltd.
InventorHirokatsu Obayashi
Life of this patent
Estimating the term…
Abstract
In a lens grinding apparatus, an edge corner-portion processing unit has a cutting tool for effecting a facet processing on an edge corner portion of a lens subjected to the finishing process. A region designating unit has a display unit for displaying a shape of the lens before the facet processing on the basis of inputted data. The region designating unit designates a region to be subjected to the facet processing using of the displayed lens shape. A selecting unit selects a facet processing style to be adopted for the designated region of the facet processing from among a plurality of facet processing styles. A computing unit obtains processing data on facet processing on the basis of the selected facet processing style and the position of the edge corner portion in the designated facet processing region.
Claims10
A lens grinding apparatus for grinding a peripheral edge of an eyeglasses lens, comprising:
- a data input unit which inputs data on a target lens shape of an eyeglasses and layout data for layout of the lens with respect to the target lens shape;
- a detecting unit which detects a position of an edge corner portion of the lens after a finishing process on the basis of the data inputted by the data input unit;
- an edge corner-portion processing unit which has a cutting tool for effecting a facet processing on the edge corner portion of the lens subjected to the finishing process, and which processes the lens by relatively moving the cutting tool with respect to a lens holding shaft;
- a region designating unit which has a display unit for displaying a shape of the lens before the facet processing on the basis of the inputted data, and which designates a region to be subjected to the facet processing using of the displayed lens shape;
- a selecting unit which selects a facet processing style to be adopted for the designated region of the facet processing from among a plurality of facet processing styles;
- and
- a computing unit which obtains processing data on facet processing on the basis of the selected facet processing style and the position of the edge corner portion in the designated facet processing region.
A lens grinding apparatus for grinding a peripheral edge of an eyeglasses lens, comprising:
- a data input unit which inputs data on a target lens shape of an eyeglasses and layout data for layout of the lens with respect to the target lens shape;
- a detecting unit which detects a position of an edge corner portion of the lens after a finishing process on the basis of the data inputted by the data input unit;
- an edge corner-portion processing unit which has a cutting tool for processing the edge corner portion of the lens subjected to the finishing process, and which processes the lens by relatively moving the cutting tool with respect to a lens holding shaft;
- a computing unit which sets a processing amount of the edge corner portion, and which determines corner-portion processing data after the finishing process on the basis of the set processing amount;
- and
- a correcting unit which corrects the processing data on the basis of detected positions of edge corner portions of lens front and rear surfaces, so that the edge thickness after edge corner-portion processing is prevented from becoming smaller than a predetermined width.
Dependencies are inferred from the claim text.