AOI is an automated optical inspection device. For 2D type AOI, the inspection method using the line scan method using a line sensor camera adopted.
In the line scan method, the entire board is imaged while switching the lighting at high speed, enabling high-speed inspection.
You can also use UV lighting to inspect for uncoated or scattered coatings, and to automatically detect defects such as surplus parts and dust in unexpected boards.
The 3D type AOI can detect the quantitative height information of the parts in the board and recognize the parts position.
By visualizing in 3D, it is possible to inspect the inclination and floating of parts, which was difficult with the 2D type, and it is possible to improve the accuracy of solder paste inspection.