| 摘要 |
<p>When a continuous oscillation laser output is to be pulsed by utilizing a Q switch, a conventional method using the Q switch involves a problem that when a frequency is changed, an oscillation excitation condition changes and a pulse waveform and a peak output change simultaneously so that dull finishing cannot be made stably. The present invention reduces an oscillator loss of a laser oscillator at the time of OFF of pulse by lowering a high-frequency signal output to be applied to the Q switch and controls the pulse waveform to a range which is suitable for the dull finish of rolls. An extremely satisfactory dull surface can be obtained in accordance with the dull finishing method of the present invention.</p> |
