| 摘要 |
PURPOSE:To omit unnecessary initializing operation and to improve the convenience in use by releasing the servo state and setting the initial state only when an initializing operation piece is operated. CONSTITUTION:A control circuit 77 which controls the operation of irradiated position correcting means 56 to 58, 59A, 60 and 61 correcting the irradiated position by a transmission light beam LA1 in response to operation pieces 37 to 42 based on output signals IX1 to IY2 of a light receiving part 68, when an initializing operation piece 37 is operated, controls the irradiated position correcting means 56 to 58, 59A, 60 and 61 to stop the irradiated position correcting action and set the irradiated position by the transmission light beam LA1 at the center of the correcting action. Thus, by operating the initializing operation piece 37 as necessary, the initial state can be set and the unnecessary initializing action in the replacement of a power supply and the like can be eliminated. |
