Patent ID: 8228509
Filing Date: 2012-07-24
Classification: G01B

Abstract:
1. A shape measuring device comprising: light projecting means for projecting a light flux to a measurement portion, which is an end portion of a disc-shaped measurement target, from a direction parallel with each face of front and back sides of said measurement target and image pickup means for picking up a projection image of said measurement portion from a direction opposing the light projection direction, said light projecting means including: a shape of the end face of said measurement target is measured on the basis of said projection image obtained by said image pickup means, wherein said shape measuring device further comprises: center sucking and supporting means for supporting said measurement target by sucking a center part of one of faces thereof; and parallel supporting means for supporting one of the faces of said measurement target at a position on the center side with respect to said measurement portion in said measurement target supported by said center sucking and supporting means in parallel with said light projection direction.