| 摘要 |
PURPOSE:To detect errors and positions of parts on a printed circuit substrate, by making a light and darkness boundary line by a projector on the surface of the printed circuit substrate and obtaining the data of a profile line by photographing the parts on the substrate which is passing the boundary line by a video camera. CONSTITUTION:A printed circuit substrate 1 which is transported is arranged so that the right side of a light and darkness boundary surface Z including an optical axis which is vertical to the substrate 1 is projected by a slit 21 of a projector 2 and the left-side light is shielded. A television camera 3 is arranged so that the optical axis forms 90 deg.-theta angle to an irradiated area Za side against the boundary surface Z, and a scanning direction is arranged so that a horizontal amplitude direction forms right angles to the direction of a boundary line Y between an irradiated area Za and a light shielded area Zb made on the substrate 1. By operating the profile line data of the Y axial direction obtained from a length of the light and darkness part of the Y axial direction, an outer profile in a width direction is decided. Then, the substrate 1 is moved to a prescribed distance and the profile line data in an X axial direction is obtained and the outer profile of a part 13 in the thickness direction is decided. The shape of the part 13 is specified from these data. |
