INTERNAL DEFECT INSPECTING METHOD AND DEVICE OF GLASS PANEL FOR CATHODE-RAY TUBE

摘要

PROBLEM TO BE SOLVED: To provide an internal defect inspecting method and device of a glass panel for a cathode-ray tube capable of facilitating and improving accuracy of detection of internal defects and improving a detection rate of microscopic defects. SOLUTION: Inspection light 3a from a light source 3 is injected into glass from an end face of a seal edge part 1d of the glass panel 1 for the cathode-ray tube supported by a support base 2. Scattered light 3b at an internal defect 6 place of an image screen 1a is detected by contrast with a dark background member 4 arranged from a front face of the image screen 1a to a back face side of the image screen 1a.