The laser welding lens detection system detects the surface defects of laser welding cover lens according to machine vision technology, aiming at solving welding quality problems caused by non-uniform laser energy ejected after the cover lens is damaged by splashing brazing base materials. The system can detect in real time, and notify operators to replace welding cover lens immediately once detecting defects that may affect welding quality of the cover lens so as to prevent defective products from entering the next production link. bwin官网手机版,bwin手机官网,bwinapp下载 illuminates the tested lens uniformly with concentric light sources, acquires images with digital camera and judges the quantity, position and dimensions of the dead pixels on lens surface. The system is also designed with an automatic cleaning system to prevent wrong judgment caused by dust interference.