| 摘要 |
PURPOSE:To enable the attainment of laser beams having a leveled distribution of intensity by a construction wherein the core wires of a number of auxiliary discharge electrodes juxtaposed on the surface of a main discharge electrode are made shorter as they are positioned nearer to the center of the row of the electrodes. CONSTITUTION:A vessel 1 wherein a gas laser medium is charged or made to circulate, a pair or more of main discharge electrodes composed of a cathode 3 and an anode 2 provided opposite to each other in the gas laser medium in said vessel, optical resonators 8, 9 provided on the opposite sides of the cathode 3 so that the direction of the optical axes thereof is made to intersect the direction of discharge of the main discharge electrode, and a number of auxiliary discharge electrodes 11 each of which has a structure of a core wire 13 being held in a glass tube and which are provided in juxtaposition along he longitudinal direction on the surface side of the cathode 3 opposite to the anode 2 so as to induce main discharge, are provided. The auxiliary discharge electrodes 11 in a gas laser oscillator constructed in this way are made to have shorter core wires 13 as they are positioned nearer to the center of the row. The length of each of the aforesaid core wires 13 is set, for instance, so that an axial symmetry is formed around the core wire 13-1 of an auxiliary discharge electrode 11-1 positioned in the center of the row. |
