CRACK-INSPECTING METHOD AND DEVICE FOR CATHODE-RAY TUBE, AND METHOD AND DEVICE FOR MANUFACTURING THE CATHODE- RAY TUBE

摘要

PROBLEM TO BE SOLVED: To provide a crack inspecting method for a cathode-ray tube, capable of automatically and surely inspecting the crack on a panel 12 of the cathode- ray tube corresponding to the state of cracking. SOLUTION: A face surface 12a and a side surface 12b of the panel 12 of the cathode-ray tube are respectively illuminated to photograph their images, and the crack on the panel 12 is specified on the basis of the photographed images of the face surface 12a and the side surfaces 12b. Both of the crack made from the side surface 12b to the face surface 12a of the panel 12, and the cracks made along the circumferential direction of the panel along the side surface 12b can be specified. That is, the crack on the panel 12 can be inspected automatically and surely corresponding to the state of cracking.