| 摘要 |
<p>A laser beam machining device consisting of a laser oscillator, a beam expander and a pumping optics, wherein optical parts and pumping optics on the side of output end forming beam expanders (8, 11) are composed of one pumping optics (11) having a characteristic formed by synthesizing optical parts and a pumping optics, enabling the reduction of the number of lenses, the suppression of absorption loss, as well as the decrease of the number of parts. Another laser beam machining device wherein part of optical parts constituting a beam expander is composed of an output coupling mirror to reduce the number of lenses is disclosed.</p> |
