| 摘要 |
Apparatus for conducting a laser beam from a laser, through an articulated arm, to an output device, said apparatus being constructed so that the output device is easily maneuvered. In one embodiment, a beam from a laser mounted on an optical bench is directed to a first mirror that reflects the beam upward along the axis of a vertical shaft. At the top of the shaft, a second mirror, mounted on a conical bearing and rotatable about the axis of the vertical shaft, reflects the laser beam along the axis of a horizontal sleeve to a third mirror that is mounted on a sleeve bearing so that it is rotatable about the horizontal axis. In like fashion, the beam from the third mirror is successively incident on fourth, fifth, sixth, seventh, and eighth mirrors all of which are rotatable about the axis of the shaft down which the incident beam propagates. Finally, the beam from the eighth mirror enters the output device. The second through eighth mirrors are all mounted in the articulated arm and are interconnected by sleeve bearings and, in some cases, hollow tubes. The arm is supported by a counterbalancing system that is connected to the arm at a point between the third and fourth mirrors. |
