| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a light quantity control apparatus configured to reduce the driving force and time required for moving a shutter blade and a light quantity adjustment member.SOLUTION: A light quantity control apparatus includes: a light quantity regulation member with an opening; a magnet rotor which may be rotated around an axis parallel to an optical axis; a yoke having a magnetic pole section facing an outer peripheral surface of the magnet rotor; a first coil wound on the yoke; a bobbin which may be rotated coaxially with the magnet rotor; a second coil wound on the bobbin so as to cover the magnet rotor; a first light quantity adjustment member which is engaged with the magnet rotor rotated by power supplied to the first coil, and moves in the opening; and a second light quantity adjustment member which is engaged with the bobbin rotated by power supplied to the second coil, and moves in the opening.</p> |
