| 摘要 |
PROBLEM TO BE SOLVED: To provide a detecting method of run-out of a rod body, even if the rod body is rotated at a high speed, surely and optically detecting the core deflection. SOLUTION: The presence/absence of the run-out of the rod body is determined by comparing the diameter R<SB>OPT</SB>of the rod body found from a ratio of a whole light receiving amount of a line sensor changed according to the presence/absence of the rod body or the diameter R<SB>REF</SB>of the rod body found by previously analyzing the output of the line sensor with the rod body non-deflected, with the diameter R<SB>CCD</SB>of the rod body found by analyzing the output of the line sensor when the rod body rotates at a high speed. COPYRIGHT: (C)2005,JPO&NCIPI
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