| 摘要 |
PURPOSE:To inspect the inserting condition of a lead by noncontact and cope with electronic parts wherein the intervals between lead terminals are narrow by positioning a douser between a light source and a printed board, and applying light to the lead insertion hole obliquely. CONSTITUTION:For a light source 47, the longitudinal center is partially screened by a douser 45, and a light 50 is applied obliquely to the lead insertion hole 4 being the object of inspection. Unless the lead 2 is inserted exactly into the lead insertion hole 4, the top of the lead 2 does not project to the opposite side, and the light does not strike the lead. If this image is picked up with an image pickup device, the image of the lead 2' does not appear at the center of the lead insertion hole 4'. If such image is binary coded with a specified threshold, the central part of the lead insertion hole 4' is converted into the black picture element. If the area of the white picture element area within the window W is measured by setting the window W in the binary image, the measured value becomes the value smaller than the specified value, and it can be judged that the lead is insufficiently inserted. |
