DEFOCUS DETECTION METHOD OF MICRO THROUGH HOLE INSPECTION DEVICE AND DEFOCUS DETECTION METHOD

PROBLEM TO BE SOLVED: To provide a micro through hole inspection device for imaging a steel plate by arranging the steel plate between a lighting device and a camera in order to detect the micro through hole in the steel plate and to inspect the presence or absence of the micro through hole based on...

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Bibliographische Detailangaben
1. Verfasser:	SHIGA SHUNSUKE
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ACCESSORIES THEREFOR APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS OPTICS PHOTOGRAPHY PHYSICS TESTING
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