| 摘要 |
PURPOSE:To reduce loss of superposition and to improve its precision by using an optical element which has plural total reflecting surfaces so coated as to obtain total reflection to laser beams when plural laser beams are superposed. CONSTITUTION:Parallel laser beams (a) and (a') emitted from individual laser oscillators are reflected totally by the V-shaped optical element 11 which has reflecting surfaces 11a and 11a' so coated as to obtain total reflection to the respective incident laser beams, thereby obtaining beams which travel in the same direction and have optical axes in parallel to each other. Those beams are incident to a lens system 2 for convergence. The laser beam projected from the lens system 2 is converged on the core part 31 of an optical fiber transmission line 3 and passed through the optical fiber transmission line 3, so that the incident laser beams (a) and (a') are superposed on the same optical path. Thus, plural laser beams are superposed on the same optical path with low loss and high precision. |
