| 摘要 |
PURPOSE:To obtain a high power focus line and to execute efficient welding by converging an output beam by the inlet side lens having a flat center part and semi-circular columnar both end parts and by a prism lens in the space with the outgoing lens whose sectional shape is reversely arranged. CONSTITUTION:The center part bc of an incident lens 6B is made flat, end parts ab, cd in semi-circular columnar shape, the end part fg of an outgoing lens 6A flat and a center part fg in semi-circular columnar shape. A prism lens 6C is arranged among those. An output beam 4 is condensed and outgone by these lenses to obtain a focus line. Preheating and main melting can thus be executed efficiently. |
