| 摘要 |
PURPOSE:To accurately regulate the angle of a mirror by moving and controlling the mirror to a preset reference position and then to the memory position after the detection value of the mirror position is corrected to the specified value that corresponds to the reference position when the mirror arrives at the reference position. CONSTITUTION:A control circuit 21 controls a mirror 10 to a preset position based on the count value of a counter 20 stored in a storage circuit 23. When the current count value of the counter 20 does not correspond to the position of a mirror 10 due to the external force actuated on the mirror 10 to move the mirror position, a motor 13 is driven through an initial drive command circuit 21a and the mirror 10 is rotated in the specified direction. This rotaion moves a slide bar 12 and the protrusion 12b closes a contact 14. In this case, since the count value of the counter 20 at that time is stored in the storage circuit 23 based on the position where a contact 24 is closed, a counter correction command circuit 21b issues a command so as to correct the current count value of the counter 20 into a stored count value when the contact 24 is closed. |
