| 主权项 |
1. A contour shape measurement method for measuring a contour shape of a surface to be measured, by moving a probe with respect to the surface in a probe scan direction to obtain measured data of the surface, the contour shape measurement method comprising:
obtaining a spatial position of an axis for rotating the surface with respect to the probe, as a rotation axis vector relative to the probe measurement axis; obtaining alignment data which is the measured data of the surface in at least two different alignment directions; coordinate-transforming each set of alignment data around the rotation axis vector by a directional difference between a measurement direction and a corresponding alignment direction, and synthesizing the coordinate-transformed sets of alignment data to constitute synthesized alignment data; calculating a spatial position of the synthesized alignment data, by adapting the synthesized alignment data to a function corresponding to a design shape of the surface or shape generated by changing the design shape; calculating a difference between a spatial position of the surface in which the probe scan axis passes at a predetermined position of the surface and the spatial position of the synthesized alignment data, as a setting error; moving an article to be measured, to a spatial position that reduces the setting error; and obtaining the measured data of the surface after moving the article.
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