| 摘要 |
PURPOSE:To efficiently determine a drilling diameter, by reading the shape of a hole mark corresponding to each drilling position and the color information applied corresponding to a hole mark position to be combined. CONSTITUTION:An optical hole mark pattern color detecting device 2 comprises a pattern read part 2a, color detecting part 2b and an irradiated light receiving part 2c. The detecting part 2b comprises a color filter mechanism 23 and a color detector 24, and reflected light from a pattern original drawing is divided into an image sensor 21 and the mechanism 23, being received. A processing device 7, being a microcomputer, provides in a main memory 7c a hole diameter determining memory table 7e by a hole mark diameter and color, determining the hole drilling diameter by referring to the table 7e and obtaining the corresponding hole diameter information. |
