| 摘要 |
PROBLEM TO BE SOLVED: To provide a defect detector capable of supplying a power source to a defect detector control circuit by the power generated by using a solar cell at a defect inspection time, simultaneously with detection of deterioration of a light source, and performing efficient and accurate light source inspection. SOLUTION: This defect detector has characteristics wherein a power generation amount is measured and monitored by using the solar cell adjacent to the light source or a light receiving part, to thereby detect deterioration of the light source, and simultaneously the power source is supplied to the detector control circuit by the power generated by the solar cell, in a method for detecting a defect of a sheet-shaped object by the detector control circuit by irradiating light to one surface of the running sheet-shaped object by a floodlight, and by receiving reflected light or transmitted light of the light irradiated to one surface of the sheet-shaped object by a light receiving part on the light irradiation surface or the other surface of the sheet-shaped object. COPYRIGHT: (C)2008,JPO&INPIT
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