| 摘要 |
<p>PURPOSE:To prevent the breakage, etc., of laser oscillators by comparing a detected light quantity with light quantity having been stored, detecting the first abnormal state on the basis of its comparison result, comparing a detected driving current value with a current value having been memorized, and detecting the second abnormal state on the basis of its comparison result. CONSTITUTION:In time of controlling light quantity, the driving current of a laser oscillator 11 is detected by a current detecting means 13, and the detected value is sent to a control means 19. The control means 19 detects the driving current abnormality of the laser oscillator 11 in accordance with the comparison result between the value detected by the current detecting means 13 and the peak value of the driving current having been stored in a storage means 17 after comparing them, and transmits a signal indicating an abnormal state to a display section, etc. In addition, the control means 19 detects the deterioration abnormality of the laser oscillator 11 in accordance with the comparison result between the value detected by a light quantity detecting means 12 and the light quantity in time of deterioration having been stored in the storage means 17 after comparing them, and transmits a signal indicating an abnormal state to the display section, etc.</p> |
