| 摘要 |
PROBLEM TO BE SOLVED: To enable improvement of measurement workability and accurate measurement by burying spheres at a plurality of points on a surface of a planar base so that the spheres are partially disclosed and height of the disclosed parts in made constant. SOLUTION: A jig 1 is placed on a stone-surface plate and a measurement head is made in contact with a sphere 3. A height gauge is reset so that measurement thickness becomes zero. The measurement head is once moved upward and a measured object 6 is placed on the jig 1. The measured object 6 is moved in forward and backward directions and right and left directions and a back surface of the object 6 and the spheres 3 are slightly rubbed to fall off a foreign material adhered to the back surface of the object 6. Then, the measurement head is moved to a surface of the object 6 and a distance between the sphere 3 and the measurement head is measured as a thickness of the object 6. Thus, different thickness of a plurality of points of the object 6 can easily be measured and besides parallelism cam be measured.
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