| 摘要 |
The present invention is a method for measuring a shape of an end portion of a threaded tube (P), and the method includes a screw axis detecting step, a laser light aligning step, a laser light image pickup step, and a shape calculating step. In the laser light aligning step, a light source (1) and an image pickup means (2) are integrally moved such that a light axis (LA) of the light source is positioned to pass a measurement point (D) (X1, Y1, Z1) on the screw axis, said measurement point being in an area to be measured within a plane (NP) including the screw axis (A), and that laser light (L) spreads in a slit shape within the plane (NP). |
