Patent ID: 6753896
Filing Date: 2004-06-22
Classification: B23K,G02B,H05K

Abstract:
A laser drawing apparatus for drawing a desired pattern on an image-receiving object by scanning the object with a laser beam, said apparatus comprising:holding means for holding said image-receiving object; exposing means having light quantity adjusting means for adjusting quantity of said laser beam, extracting means for extracting at least part of said laser beam in the quantity adjusted by said light quantity adjusting means, and first light quantity detecting means for detecting quantity of the laser beam extracted by said extracting means, said laser beam in the quantity adjusted by said light quantity adjusting means being scanned in a primary scanning direction over said image-receiving object held by said holding means; moving means for moving said holding means relative to said exposing means in a secondary scanning direction perpendicular to said primary scanning direction; drawing control means for controlling said exposing means and said moving means; second light quantity detecting means disposed on said holding means for directly detecting the quantity of said laser beam emitted from said exposing means toward said holding means; and calibrating means for calibrating said first light quantity detecting means based on results of detection by said first light quantity detecting means and results of detection by said second light quantity detecting means.