LENS MACHINING SYSTEM, MACHINING SIZE MANAGEMENT DEVICE, MACHINING SIZE MANAGEMENT METHOD AND METHOD FOR MANUFACTURING SPECTACLE LENS

摘要

A lens edging system 4 of the present invention includes: an edger 9 configured to perform edging to a spectacle lens in accordance with three-dimensional edging locus data obtained from edging shape data by calculation; a three-dimensional circumferential length measurement device 10 configured to measure a circumferential length of the spectacle lens edged by the edger 9; and an edging size management device (7, 8) configured to correct a calculation parameter used for calculating the edging locus data, based on a difference between a measured circumferential length obtained by a three-dimensional circumferential length measurement device 10, and a theoretical circumferential length obtained by calculation.