| 摘要 |
<p>PROBLEM TO BE SOLVED: To to attain a required power density distribution of a laser beam and to realize a laser marking equipment exact and excellent in visibility by executing modified adjustment of transmission rate distribution of shattering matrix expressible in gradations. SOLUTION: A laser beam ahead of being made incident on a liquid crystal 10 through a beam sampler 3 is inputted in a control part 6 from a monitoring camera 5, and a power density distribution of the laser beam is detected. The control part 6 generates a corrected transmission rate pattern in order to unify the detected power density distribution, decides a transmission rate pattern of the liquid crystal 10 from the corrected transmission rate pattern and from a transmission rata pattern to carry out print of required letters or others, and with this decided transmission pattern the laser beam 1 is made to transmit the liquid crystal 10 to print on a working object 12. Thereby, it is made possible to adjust the laser beam power density distribution to a required power density distribution and to execute print exact free from thinning or others and excellent in visibility.</p> |
