| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light amount adjustment device capable of improving both high-speed driving performance and low-speed driving performance. <P>SOLUTION: A light amount adjustment device comprises: first and second motors that can be driven independently of each other; a first driven member that is rotary-driven by the first motor at a first speed reduction ratio; a second driven member that is rotary-driven by the second motor at a second speed reduction ratio which is larger than the first speed reduction ratio; a light shielding member that changes an opening amount by the drive of the first driven member or the second driven member; and a control section that drives and controls the first motor and the second motor. The control section is switchable so as to drive by a second number of steps with the first motor after driving a first number of steps by the second motor when driving by a predetermined number of steps using the first and the second motors. <P>COPYRIGHT: (C)2013,JPO&INPIT |
