LENS CENTER THICKNESS MEASURING INSTRUMENT AND LENS CENTER THICKNESS MEASURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a lens center thickness measuring instrument for correctly measuring the lens-center thicknesses of to-be-inspected lenses having various shapes and the thicknesses, without causing degradation in the appearance quality of the to-be-inspected lenses.;SOLUTION: The lens center thickness measuring instrument 1A includes two noncontact length measuring meters 2a, 2b having range-finding sensor heads 22a, 22b; a length measuring meter support section 3A for making the sensor heads in two noncontact length measuring meters face each other, aligning measurement axes MA1, MA2 for the sensor heads, and supporting the sensor heads; and a lens holding section 4A provided between the sensor heads, exposing at least optical centers Lc, Ld of the to-be-inspected lens L1, aligning the optical axis Lx of the to-be-inspected lens with the measurement axis, and supporting the to-be-inspected lens.;COPYRIGHT: (C)2011,JPO&INPIT