| 摘要 |
PURPOSE:To reduce a distribution loss through simple constitution by coupling one columnar lens which is in parallel to the long-axis direction of the projection beam of a semiconductor laser optically, with an optical fiber array. CONSTITUTION:The projection light of the semiconductor laser 1 is coupled with the optical fiber array 3 wherein end surfaces arrayed linearly on the same plane through one columnar lens 2 arranged so that its axial direction is parallel to the long-axis direction (X axis) of the projection beam. The angle (total angle) of projection in the X direction is 40-50 deg. and that in the Y direction is only about 10 deg., so the convergence of the columnar lens 2 is effective only to a beam which spreads in the Y direction. Namely, a large angle of divergence in the X direction is maintained, so optical distribution to said optical fiber array 3 is realized. Thus, the projection light of one semiconductor laser is distributed to plural optical fibers through the simple constitution. |
