METHOD FOR INSPECTING STAMP AND METHOD FOR INSPECTING SHEET FOR FORMING STAMP

摘要

PROBLEM TO BE SOLVED: To provide a method whereby stamps and sheets for forming stamps can be surely and speedily inspected and an acceptable range in terms of a quality can be arbitrarily determined.;SOLUTION: There is provided the method for inspecting stamps which includes steps of irradiating a laser light while scanning in a predetermined direction to the stamps with a stamping face formed, measuring a shift amount after receiving the laser light reflected by the stamp with the use of a surveying device capable of measuring a physical change of the stamping face from a change of the laser light, and checking the presence/absence of defects by comparing reference data registered beforehand to a storage means with the measured data of the stamp. There is also provided the method for inspecting sheets for forming stamps which includes steps of irradiating a laser light while scanning in a predetermined direction to the sheet for forming stamps, measuring a shift amount after receiving the laser light reflected by the sheet with the use of a surveying device capable of measuring a physical change of a stamping face from a change of the laser light, and checking the presence/absence of defects by comparing reference data registered beforehand to a storage means with the measured data of the sheet.;COPYRIGHT: (C)2002,JPO