| 摘要 |
PURPOSE:To allow the electric field strength of a radiating radio wave to stably fall within a standard by simply varying the oscillation frequency of the radio wave radiated from high-frequency modules in a plurality of optical heads placed in the same apparatus. CONSTITUTION:The operating power source voltage of high-frequency module of a laser controller 132 is regulated via a control circuit 131 by setting from an operating unit 2, and the operating power source voltage of the high-frequency module of a laser controller 142 is regulated via a control circuit 141. A sufficient frequency difference is obtained by considering the movement (change) by the temperature so that the oscillation frequency of the radiating radio wave from the module of the control circuit 132 does not coincide with that of the module of the circuit 142. |
