Patent ID: 8089636

Claim:
An inspecting system for inspecting abnormal concave-convex irregularities in an inspection target surface defined in a surface of a workpiece, comprising: a display part adapted to display a stripe pattern of periodically continuous unit stripes, each unit stripe being formed of linear bright and dark portions having a constant width; image detection means adapted to detect the stripe pattern reflected on the inspection target surface; holding means adapted to hold the display part so that an extending direction of the unit stripes is substantially in parallel to the inspection target surface and to hold the image detection means so that an optical axis of detecting an image is diagonal to the inspection target surface; a relative position setting part adapted to drive the holding means or the workpiece to change a relative position thereof to be multiple; a specifying part adapted to specify a unit stripes reflected image, which is a reflected image of one or more continuous unit stripes, selected among reflected images existing in a predetermined distance range counted from an edge in a closer side to the workpiece in a stripe pattern reflected image which is a reflected image of the stripe pattern in each of the relative positions; a phase shifting part adapted to shift a reflected position of the stripe pattern reflected on the inspection target surface by 1/n periods when viewed from the image detection means in each of the relative positions, wherein n is an integer of two or more; and an image processing part adapted to determinably output abnormal concave-convex irregularities within the inspection target surface based on the unit stripes reflected image in each phase in each of the relative positions, wherein the relative position setting part sets each of the relative positions so as to cover the inspection target surface with the unit stripes reflected image specified in each of the relative positions.