PURPOSE: To surely recognize the position of the mark on a board.
CONSTITUTION: The illumination light H2 from a light source 3 transmits a milky translucent plate 33, and the illuminance distribution is smoothed. The smoothed illumination light H3 is reflected on a half-mirror 21, and it is radiated to a printed board K as the illumination light H3 coaxial with the optical axis L of a CCD camera 1. The regulated light H4 from the printed board K transmits the half-mirror 21 and is received by an image pickup camera 1. The position of a mark M is recognized by the image of the printed board K, and drilling is applied at the center of gravity position of the mark M. The contrast between the portion of the mark M and the other portion is made clear, and drilling can be correctly made.
INAMI TOSHIO
MATSUURA YASUSHI
| JP2063910B | ||||
| JPH05162050A | 1993-06-29 | |||
| JPS6313641B2 | 1988-03-26 |