| 摘要 |
PROBLEM TO BE SOLVED: To provide a flaw inspection device capable of inspecting the flaw of an inner peripheral wall surface in a shorter time, and a flaw inspection method. SOLUTION: The detection pipe inserted in an almost columnar space along with the axial direction of the columnar space and a control device are provided. The incident surface of a light detecting optical fiber is arranged to the leading end of the detection pipe so as to be opposed to the inner peripheral wall surface of the columnar space. The emitting surface of a floodlight projection optical fiber is arranged so as to be adjacent to the incident surface of the light detecting optical fiber in the same direction as the light detecting optical fiber. The control device is constituted so as to relatively rotate the detection pipe, which inputs light to the incident surface of the floodlight projection optical fiber and is inserted along the axial direction of the columnar space, along the circumference of the inner peripheral wall surface of the columnar space or to relatively reciprocate along the axial direction of the columnar space so as to keep the distance up to the opposed of the columnar space from the incident surface of the light detecting optical fiber and the emitting surface of the floodlight optical fiber constant to judge the flaw of the inner peripheral wall surface of the columnar space on the basis of the detection light outputted from the emitting surface of the light detecting optical fiber. COPYRIGHT: (C)2007,JPO&INPIT
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