公开(公告)号：JPH09105890A

公开(公告)日：1997-04-22

申请号：JP19825496

申请日：1996-06-24

Applicant: ESSILOR INT

Inventor： ROORAN GIYUIERUMAN ,  ANRI UUGA ,  PATORITSUKU OREERU

IPC: G02C5/00 ,  G01B3/14 ,  G02C13/00

Abstract: PROBLEM TO BE SOLVED: To provide a calibration gage suitable for calibration of a contour reader and a calibration method using this calibration gage by measuring the size between the inner flanks of the calibration gage and the size between the outer flanks. SOLUTION: The calibration gauge 48 is designed so as to be mounted at the contour reader 10 to be calibrated in place of a spectacle frame 12. Since the calibration gage 48 is projected by only the one side of a plate 50, a flange 56 comes into contact with a supporting block 22 of a bottom jaw 13B of the contour reader 10. The point of a feeder 15 is actuated on the inner side of the frame to read the size C1. The heel of the feeler 15 is actuated on the outer side of the frame to read the size C2. The respective read values are determined by the conversion of an encoder and are deviated from the exact values by a system error. As a result, the two parameters are determined by the extremely simple method.