| 摘要 |
PROBLEM TO BE SOLVED: To provide a laser processing device and laser processing method, capable of improving power efficiency and also lowering a noise level of a fan.SOLUTION: A laser processing device comprises: a laser light emitting unit for emitting laser light; a Peltier element for cooling or heating the laser light emitting unit; and a heat sink that is formed from heat dissipation material to dissipate heat thermally transferred from the laser light emitting unit and the Peltier element. The temperature of the laser light emitting unit is kept to be a target temperature by cooling or heating the Peltier element. The laser processing device is configured so as to include: a fan for cooling the heat sink; a temperature difference detection unit for detecting a temperature difference between a temperature of the laser light emitting unit and a temperature around the heat sink; and a fan control unit for controlling the revolution speed of the fan depending on the temperature difference detected through the temperature difference detection unit.SELECTED DRAWING: Figure 3 |
