Camera
OwnerHaruo Onozuka, Fumio Iwai +1inventors
InventorsHaruo Onozuka, Fumio Iwai, Noboru Shimada
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Abstract
The present invention provides a camera which can appropriately move and control a lens group even when the driving of a driving source is erroneously detected. A motor for moving a lens group of a taking optical system is disposed, whereas a detector which outputs a pulse signal as the motor rotates is provided. After the motor is driven in response to a control signal of a CPU so that the lens group starts moving, the operation of moving the lens group is terminated if a predetermined time has elapsed after the lens group starts moving even when the pulse signal is outputted from the detector. Therefore, even when the detector erroneously detects the driving of the motor, the lens group can be moved and controlled appropriately.
Claims4
A camera comprising:
- a lens optical system in which a plurality of lens groups are disposed along optical axis, at least one of said plurality of lens groups being a movable lens group;
- a lens moving mechanism for moving said movable lens group by transmitting a riving force of a driving source thereto;
- movement control means for driving and controlling said driving source so as to move said movable lens group to a predetermined position;
- drive detecting means for outputting a pulse signal when said driving source is driven;
- and
- measurement means for measuring a predetermined time after said movable lens group starts moving;
- wherein said movable lens group is stopped moving if said predetermined time ha elapsed after said movable lens group starts moving even when said pulse signal is outputted from said drive detecting means.
Dependencies are inferred from the claim text.