| 摘要 |
PURPOSE: To prevent the occurrence of erroneous detection due to radiation of illuminating light for inspection at the time when defect inspection is automated by applying an image processing technology. CONSTITUTION: A defect inspection apparatus 1 is an apparatus provided with a light radiating means to radiate illuminating light to a resin pellet of an inspection part 5, a color CCD camera 7 to take an image of the pellet on the inspection part 5, an image processing means to carry out a prescribed image processing for the image taken by the camera, and a defect detecting means to detect the defect of the pellet based on the results of the image processing and the pellet is an opaque pellet. A pellet sending apparatus 2 to send a group of pellets on the inspection part 5 while arranging the pellets on the a conveying route and preventing them from overlapping mutually is also installed and at the same time the bottom part of the inspection part is made of a transparent glass plate 42 and the light radiating means is provided with an upper side illuminating lamp 6 to radiate illuminating light to the pellets from the upper side and a lower side illuminating lamp to radiate illuminating light to the pellets from the lower side of the transparent glass plate. |
