| 摘要 |
PROBLEM TO BE SOLVED: To shorten the time required for an operation of extending a lens while using a collapsible lens. SOLUTION: A lens 12 is at a collapsed position ((A) in Fig. 1) when power is supplied to a camera, and is driven to an extended position ((B) in Fig. 1) by a stepping motor 14. When the lens 12 reaches the extended position ((B) in Fig. 1), the positional information of the lens 12 is read by a photosensor 16. Since step-out causes no harm while the lens 12 is being driven from the collapsed position ((A) in Fig. 1) to the extended position ((B) in Fig. 1), the stepping motor 14 is driven in a pull-out area in which it is driven by high torque and high speed, so that the time required by the lens 12 to reach the extended position ((B) in Fig. 1) from the collapsed position ((A) in Fig. 1) is shortened when the power is supplied. COPYRIGHT: (C)2003,JPO
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