| 摘要 |
PURPOSE:To easily perform the direction setting of a beam from a semiconductor laser beam source capable of transmitting a large amount of information at high speed and to lower output required for light emission. CONSTITUTION:A semiconductor laser 10, and a lens 20 provided with a bus perpendicular to the longitudinal axis rX of the far-field pattern P1 of a laser beam LB and also, provided with a first circular cylindrical plane S1 in which the spread angle theta1 of the laser beam LB is set at theta2 by decreasing in the direction of X and a bus perpendicular to the bus of the first circular cylindrical plane S1, and equipped with a second circular cylindrical plane S2 in which the spread angle alpha1 of the laser beam LB is set at alpha2 by increasing in the direction of Y are provided at a body 50. |
