| 摘要 |
PROBLEM TO BE SOLVED: To provide a laser marking apparatus capable of reducing a time required for printing.SOLUTION: A laser oscillation control means produces a code data in which there are disposed irradiation unit cells 62a radiating a laser beam and blank unit cells 62b not radiating a laser beam, both of which are unit cells constituting a two-dimensional code 61. Then, the laser oscillation control means produces a reversed code data in which the irradiation unit cells 62a and the blank unit cells 62b in the code data are reversed. A beam scanning mechanism irradiates the irradiation unit cells 62a in the code data with a laser beam set to have a first laser power, so that the two-dimensional code 61 is printed on a work. Then, the beam scanning mechanism irradiates the irradiation unit cells 62a in the reversed code data with a laser beam set to have a second laser power different from the first laser power, so that the reversed two-dimensional code 63 is printed on the work as an under print. |
