| 摘要 |
PURPOSE:To condense one laser beam to two points at interval of the specific distance at the same time and to finely control the ratio of laser beam powers at the two points by arranging a collimator lens, wedge shaped transparent body, filter and condenser lens to a beam emitting apparatus for laser beam machining. CONSTITUTION:The laser beam from a laser beam generator is transmitted to a beam emitting unit body 1 for laser beam machining with optical fiber 2. The laser beam transmitted from the optical fiber 2 is divided into the specific two directions with the wedge shaped transparent body 4 whose a beam incident face is perpendicular to the laser beam and the emitting face has the specific inclined angle, after converted to the parallel laser beam with the collimator lens 3. By varying the inclined angle of emitting face in the wedge shaped transparent body 4, the parallel laser beam is divided into two laser beams having the specific angle based on the inclined angle of wedge shaped transparent body 4. The filter 5 where a part of the laser beam at one direction of the laser beams divided into the specific two directions is attenuated, is put behind of the transparent body 4. The laser beams divided into the specific two directions are condensed into two points with the condenser lens 6. |
