Patent ID: 8421857

Claim:
An inspection device of a plugged honeycomb structure in which the cylindrical plugged honeycomb structure having porous partition walls to partition a plurality of cells extending through the structure from one end face to the other end face thereof and having plugged portions at the ends of the cells is an inspection target, the inspection device comprising: a light source which illuminates the one end face of the plugged honeycomb structure as the inspection target; a camera-side lens which condenses light emitted from the light source to the one end face, transmitted through the plugged portions of the plugged honeycomb structure and radiated from the other end face; a camera which receives the light condensed by the camera-side lens; and an image processor which processes an image of the luminance of the transmitted light received by the camera to display the contrast of the luminance of the transmitted light transmitted through the plugged portions of the plugged honeycomb structure, which luminance is indicative of at least one of the depth of the plugged portions and a defect in one or more of the plugged portions.