| 摘要 |
PURPOSE:To obtain a laser oscillator, which can control a mode continuously in a short time without requiring time, by forming at least either of a partial reflecting mirror or a total reflecting mirror in a reflecting mirror, curvature thereof can be varied. CONSTITUTION:In a laser oscillator, the curvature of a total reflecting mirror 2 is changed into proper curvature by hydraulic pressure, and the diameter of an aperture 4 for selecting an equivalent mode and the mode of laser beams 6 projected from a partial reflecting mirror 1 is controlled. The total reflecting mirror 2 is formed in a reflecting mirror, curvature thereof can be altered, in order to control the mode of laser beams 6, but the total reflecting mirror may be shaped in a reflecting mirror, curvature thereof is not varied, and a total reflecting mirror 3 may be formed in a reflecting mirror, curvature thereof can be changed by hydraulic pressure. The total reflecting mirror 2 or 3 is shaped in the reflecting mirror, curvature thereof can be altered by hydraulic pressure, but it may be formed in a reflecting mirror, curvature thereof can be varied by atmospheric pressure. When the total reflecting mirror 2 is shaped in the reflecting mirror, curvature thereof can be changed, the total reflecting mirror 3 may be constituted as a partial reflecting mirror. |
