Patent ID: 8042280

Claim:
A lens shape measurement device, comprising: a lens holder set in a measurement device main body; a measuring element for a lens configured to measure a rim shape of a lens held in the lens holder; a measuring element shifter configured to displace the measuring element for a lens along an outer circumferential face of the lens; a position detector configured to detect a coordinate of the measuring element for a lens; and an arithmetic control circuit configured to obtain circumferential face shape data of the lens according to a detection signal from the position detector as two-dimensional information, bring the measuring element for a lens into contact with at least two points of one of two refracting surfaces of the lens held in the lens holder by controlling the measuring element shifter, obtain coordinates of the two points according to the detection signal from the position detector, and obtain a curve value which is a curvature of one refracting surface of the lens from the coordinates of the two points.