| 摘要 |
A drive control apparatus 118 includes a stepping motor 111-a capable of performing a micro step drive having a predetermined division number by using a sinusoidal excitation current, a transmission mechanism 111-c, 111-d configured to transmit an energy generated by a drive of the stepping motor to a focus lens 105 to move the focus lens 105, and a controller 111-b configured to control the stepping motor 111-a so that the number of micro steps in a micro step drive having the predetermined division number in a drive crossing a first phase is smaller than the number of micro steps in a drive crossing a second phase where a rotation angle of the stepping motor 111-a is smaller than a rotation angle in the first phase. |
