Lens edging method, lens edging program and edging controller

Abstract

A lens edging method of performing edging to a spectacle-lens, using an edger equipped with a plurality of types of edging tools, including: a step of dividing an edging portion to be edged during edging of the spectacle-lens, into a plurality of shape element portions, based on three-dimensional shape data of the spectacle-lens; a step of allocating an edging tool used for edging each of the plurality of shape element portions, from the plurality of types of edging tools, in accordance with a previously set tool selection reference; an step of determining a using order of each edging tool allocated to each of the plurality of shape element portions, in accordance with a previously set using priority order; and a step of making the edger perform edging using each edging tool allocated in the tool allocation step, in accordance with the using order determined in the edging order determination step.

1 . A lens edging method of performing edging to a spectacle lens, using an edger equipped with a plurality of types of edging tools, comprising:
 a shape division step of dividing an edging portion to be edged during edging of the spectacle lens, into a plurality of shape element portions, based on three-dimensional shape data of the spectacle lens;   a tool allocation step of allocating an edging tool used for edging each of the plurality of shape element portions, from the plurality of types of edging tools, in accordance with a previously set tool selection reference;   an edging order determination step of determining a using order of each edging tool allocated to each of the plurality of shape element portions, in accordance with a previously set using priority order; and   an edging instruction step of making the edger perform edging using each edging tool allocated in the tool allocation step, in accordance with the using order determined in the edging order determination step.   
     
     
         2 . The lens edging method according to  claim 1 , wherein the shape division step is the step of extracting data regarding the plurality of shape element portions from the three-dimensional data, through
 an outer shape acquisition step of acquiring convex surface side shape data regarding an outer shape on a convex surface side of the spectacle lens and concave surface side shape data regarding an outer shape on a concave surface side of the spectacle lens, from the three-dimensional shape data;   a projection shape acquisition step of acquiring data regarding a projection shape obtained by synthesizing the convex surface side outer shape based on the convex surface side shaped data and the concave surface side outer shape based on the concave surface side shape data, as projection shape data;   an outermost shape extraction step of obtaining a prescribed circumscribed graphic shape circumscribing the projection shape specified by the projection shape data at each prescribed angle while changing a relative angle of the projection shape and the circumscribed graphic shape, and extracting data regarding a shape of an inside area common to each of all obtained circumscribed graphic shapes, as outermost edging shape data;   a penetrated edging shape extraction step of obtaining a differential area between an outer shape specified by the outermost edging shape data and the projection shape specified by the projection shape data, and extracting data regarding a shape portion of the obtained differential area as penetrated edging shape data; and   a non-penetrated edging shape extraction step of obtaining a differential area between a projection shape specified by the projection shape data and a convex surface side shape specified by the convex surface side shape data, and extracting data regarding a shape of the obtained differential area as convex surface side edging shape data, and obtaining a differential area between the projection shape specified by the projection shape data and a concave surface side shape specified by the concave surface side shape data, and extracting data regarding a shape of the obtained differential area as concave surface side edging shape data.   
     
     
         3 . The lens edging method according to  claim 1 , wherein the tool selection reference used in the tool allocation step, is based on at least one of the attributes of the edging tool or a calculation result of an edging volume of the shape element portion. 
     
     
         4 . The lens edging method according to  claim 1 , wherein the using priority order used in the edging order determination step, is set based on at least one of the attributes of the edging tool, a calculation result of an edging time required for the shape element portion, or a tool mounting structure of the edger. 
     
     
         5 . A lens edging program for causing a computer included in an edger equipped with a plurality of types of edging tools for performing edging to a spectacle lens, or a computer connected to the edger, to execute:
 a shape division step of dividing an edging portion to be edged during edging of the spectacle lens, into a plurality of shape element portions, based on three-dimensional shape data of the spectacle lens;   
       a tool allocation step of allocating an edging tool used for edging each of the plurality of shape element portions, from the plurality of types of edging tools, in accordance with a previously set tool selection reference;
 an edging order determination step of determining a using order of each edging tool allocated to each of the plurality of shape element portions, in accordance with a previously set using priority order; and 
 an edging instruction step of making the edger perform edging using each edging tool allocated in the tool allocation step, in accordance with the using order determined in the edging order determination step. 
 
     
     
         6 . An edging controller configured including a computer for executing the lens edging program described in the fifth aspect. 
     
     
         7 . The lens edging method according to  claim 2 , wherein the tool selection reference used in the tool allocation step, is based on at least one of the attributes of the edging tool or a calculation result of an edging volume of the shape element portion. 
     
     
         8 . The lens edging method according to  claim 2 , wherein the using priority order used in the edging order determination step, is set based on at least one of the attributes of the edging tool, a calculation result of an edging time required for the shape element portion, or a tool mounting structure of the edger. 
     
     
         9 . The lens edging method according to  claim 3 , wherein the using priority order used in the edging order determination step, is set based on at least one of the attributes of the edging tool, a calculation result of an edging time required for the shape element portion, or a tool mounting structure of the edger. 
     
     
         10 . The lens edging method according to  claim 7 , wherein the using priority order used in the edging order determination step, is set based on at least one of the attributes of the edging tool, a calculation result of an edging time required for the shape element portion, or a tool mounting structure of the edger.