| 摘要 |
PROBLEM TO BE SOLVED: To provide an decentering measuring method of a lens capable of performing decentering measurement of a curved surface shaft with respect to a lens outer diameter only by curved surface shape measurement within a curved surface shape guarantee range. SOLUTION: The decentering measuring method comprises a first process of using a position separated, by a predetermined amount, from a predetermined position on an inspected surface of an inspected lens as a reference position, scanning the inspected surface from the reference position with a measuring piece, and measuring the shape of the inspected surface. The decentering measuring method comprises a second process of using a position separated, by the predetermined amount, from the predetermined position on a route reversed by 180°with respect to the scanning direction of the first process due to the rotation of the inspected lens, scanning the inspected surface from the reference position with the measuring piece, and measuring the shape of the inspected surface. The decentering measuring method determines the decentering amount based on the measuring result obtained in the first and second processes. COPYRIGHT: (C)2006,JPO&NCIPI
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