Following to the electromagnetic wave shielded defective detection device and the electromagnetic wave shielded defective

摘要

PROBLEM TO BE SOLVED: To solve such problems that the repair work for an electromagnetic wave shield is difficult and needs a long term of work and a large expense, etc. if a defect of the electromagnetic shield is detected after the completion of a building, although the defect of the electromagnetic wave shield can be detected after the completion of the building. ;SOLUTION: If electromagnetic wave pulses and a light pulse reflected by a shield inspection surface 51 are received, an electromagnetic wave pulse, out of the received electromagnetic wave pulses, whose phase coincides with that of the light pulse is extracted, the amplitude value of the electromagnetic wave pulse is compared with a reference value, and the existence of a defect is judged.;COPYRIGHT: (C)2003,JPO