Patent ID: 7768636

Claim:
An apparatus for inspecting a belt having a flat inner portion, a flat outer portion, and a curved side portion, the apparatus comprising: a first light source for outputting a first illuminating light beam to illuminate the flat inner portion of the belt, said flat inner portion of the belt being an inner peripheral end surface; a second light source for outputting a second illuminating light beam to illuminate the flat outer portion of the belt, said flat outer portion of the belt being an outer peripheral end surface; a third light source for outputting a third illuminating light beam to illuminate the curved side portion of the belt, said curved side portion being a side end surface that extends between the flat inner portion and the flat outer portion of the belt; and a light detector for detecting the first illuminating light beam, the second illuminating light beam, and the third illuminating light beam, that are reflected by the flat inner portion, the flat outer portion, and the curved side portion, respectively, to the light detector, wherein the first illuminating light beam, the second illuminating light beam, and the third illuminating light beam have different wavelengths, and surface states of the flat inner portion, the flat outer portion, and the curved side portion are inspected based on light information detected by the light detector.