它与母材成一定角度投射到接头上，光片与搭接接头会成一单光纹，而母材垂直上方的CCD摄像机拍摄折线光纹，同步送计算机处理。
The light-plate that is shot by semiconductor laser comes to a certain angle to throw overlap joint , which brings a single vein of light , and CCD camcorder shoots and sends it to the computer .
折线纹