A vision system for on-line inspection of CRT electron-gun gaps

摘要

A high-resolution vision system for on-line measurements of color CRT electron-gun (E- gun) grid gaps has been developed. The measurement principle is based on a digital image-processing technique combined with a multi-path imaging system. By utilizing the arrangement of multi-path image processing, the measurements for different types of guns and for different gaps on a gun can be effectively executed with higher resolution The purposes of on-line inspection and statistical qual- ity control are also easily implemented. Experiments were executed in the production line of a 15-in. Monitor, and the experimental results show that the system resolution is about 8.5-10μm and the On-line inspection index is about 300 pcs/hour.