| 摘要 |
PROBLEM TO BE SOLVED: To provide a through-hole clogging inspection device for a honeycomb-shaped object by means of comparison with a previously photographed reference image, suffering no deterioration in accuracy, and dispensing with an expensive large-diameter telecentric lens. SOLUTION: This inspection device has a main part comprising a diffused illumination lamp for transmitted light, a diffusion plate, a camera, and at least two illumination lamps for reflected light. The diffusion plate is provided parallel to a diffused illumination plane for transmitted light and capable of being put into or out of an optical path at a distance allowing the honeycomb-shaped object to be provided between the diffusion plate and the illumination lamp for transmitted light so as to cause the through hole center line of the honeycomb-shaped object to be vertical to the illumination plane for transmitted light. The camera is provided so that the center line of a lens of the camera is vertical to the illumination plane for transmitted light, and at least two illumination lamps for reflected light are provided centering around the camera at equal intervals so as to illuminate the honeycomb- shaped object. COPYRIGHT: (C)2004,JPO
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