| 摘要 |
PURPOSE:To perform medical treatment due to laser beams having different wavelengths using one laser oscillator by mounting a non-linear optical element and a mechanism for moving said non-linear optical element to the outside of a laser resonator in the laser resonator of a laser oscillator. CONSTITUTION:The laser beam having a wavelength of 1064nm excited by a YAG laser rod 1 is amplified by a resonator constituted of reflecting mirrors 2, 3 and also converted to 532nm in its wavelength by the non-linear optical element 4 placed in the resonator to pass through the reflecting mirror 2. The laser beam 5 passing through the reflecting mirror 2 to be emitted from a laser oscillator 14 is condensed by a lens 6 to be incident to an optical fiber 7 to be guided to the leading end part thereof and condensed by a lens 8 to irradiate the affected part 15. When the optical element 4 is moved to the outside of the laser oscillator along a guide rail 18, the laser beam having the wavelength of 1064nm amplified by the resonator and transmitted through the reflecting mirror 16 is condensed by the lens 6 and incident to the optical fiber 7 to be guided to the leading end part thereof and condensed by the lens 8 to irradiate the affected part 15. |
