| 摘要 |
PURPOSE:To judge that the emission of laser beam is possible by the probe of the holding part at hand and to prevent the erroneous irradiation with laser beam by providing the display means of the operation stop of a laser beam irradiation standby switch for making laser beam possible to irradiate. CONSTITUTION:When a power switch is closed, a current is supplied to a switch circuit 17 and a light emitting element 14 emits light and, when a preparation switch 3 is pushed, an electric signal is sent to switch circuits 17, 18 from a preparation circuit 2. However, since an NOT circuit 19 is provided to the switch circuit 17, when the electric signal is in an ON state, the switch circuit 17 is converted to an OFF state and a green light emitting element 14 is put out and, since no NOT circuit is provided to the switch circuit 18, a red light emitting element 15 is lighted. When an emission switch 13 is pushed, a signal is transmitted to an AND circuit 16 and subjected to logical operation along with the signal of the preparation circuit 2 and an actuator 6 is operated and a shutter 5 is retracted to irradiate a region 11 to be irradiated with laser beam. Therefore, an operator can confirm a state capable of emitting laser beam. |
