| 摘要 |
PROBLEM TO BE SOLVED: To provide a calibration element taking account of the dependence of an object to be detected on thickness with a simple structure. SOLUTION: The calibration element 1 has at least one support foot 8 to specify a relationship between an object thickness 19 and image-forming magnification 18, and the length 9 of the support foot 8 is selected to produce a change that can be evaluated within the image forming magnification 18 of camera images 14, 14' by reversing the calibration element 1 to set it down on the at least one support foot 8, and the length 9 of the at least one support foot 8 is at least twice as large as the wall thickness 10 of the calibration element 1 in a calibration region 4. COPYRIGHT: (C)2009,JPO&INPIT
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