| 摘要 |
In order to prevent electrical discharges between the cathode electrode of a gas discharge laser and the closest metal resonator mirror, means are provided adjacent the optical path between the closest resonator mirror and the cathode electrode for conveying the electrical discharge from the cathode electrode to a reflectively inactive area of the mirror. In one preferred embodiment the electrically conducting means is a flanged tube coaxial with the optical path and having the flanged portion in electrical contact with the reflectively inactive area. In other embodiments the electrical conducting means include a metal block having a bore which is coaxial with the optical path; the block being in electrical contact with a reflectively inactive area of the mirror. In still another embodiment the electrical conducting means include a rod projecting from the mirror mounting block which is electrically connected to a reflectively inactive area of the mirror.
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