| 摘要 |
A work holder (22) for holding work (W) has a porous body (34) disposed in the inner periphery thereof, and work (W) is held in the center of the work holder (22) by the centripetal action of the air spouted from the porous body (34). The work (W) held in the work holder (22) has its end surface imaged by a CCD camera (54), and according to the image of the end surface of the work project on the CCD, the eccentricity of the work (W) can be taken without rotating the work (W). Thus, a size measuring method and a device therfor can be provided which are capable of taking a simple and accurate size measurement of work by means of a simple arrangement.
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