Patent ID: 8421860

Claim:
An inspection method of a honeycomb structure, the honeycomb structure which is cylindrical and has porous partition walls to partition a plurality of cells extending through the honeycomb structure from one end face to the other end face thereof is an inspection target, the method comprising the steps of: aligning a first end surface of the one end face of the honeycomb structure orthogonally with respect to the optical axis of a light source; illuminating the one end face of the honeycomb structure as the inspection target by the light source; condensing, by a lens having an angle of view, light which is emitted from the light source to the one end face, passed through the cells of the honeycomb structure and radiated from the other end face; receiving the light condensed on the condensing lens by a camera; subjecting the light received by the camera to image processing by an image processor, thereby specifying the radiated position of the light on the other end face; and calculating the tilt of the cells of the honeycomb structure from the radiated position of the light on the other end face, and the direction of the tilt.