Patent ID: 8499468

Claim:
A lens shape measurement device, comprising: a lens holder set in a measuring element main body; a measuring element for a lens configured to measure a rim shape of a lens, the measuring element for a lens including a leading end portion engageable with a mounting hole of the lens for an attachment, which is held in the lens holder, and a side face which has contact with a circumferential face of the lens to be moved therealong; a measurement element shifter configured to displace the measuring element for a lens along an outer circumferential face of the lens; a first position detector configured to detect a position of the measuring element for a lens along the outer circumferential face; a second position detector configured to detect a position in the direction orthogonal to the first position detector; and an arithmetic control circuit configured to obtain a relationship between the rim shape and a position of the mounting hole based on a detection signal from the second position detector by controlling the measuring element shifter to move the leading end of the measuring element for a lens to have contact with an refracting face of the lens held in the lens holder.