Back to results
US 7,405,888 B2Granted
Image taking apparatus
AssigneeFUJIFILM Corporation
InventorHiroyuki Otaka
Life of this patent
Estimating the term…
Abstract
An image taking apparatus is provided with a lens driving unit that includes a magnetic shaft in which the S pole and the N pole are alternately aligned in a longitudinal direction of the shaft. The lens driving unit also includes a first lens holding frame that holds a first lens and has a first coil, and a second lens holding frame that holds a second lens and has a second coil. The magnetic shaft is inserted in the first and second coils, so that each of the first and second coils form a linear motor in cooperation with the magnetic shaft.
Claims10
An image taking apparatus comprising:
- a lens driving unit that independently drives a plurality of lenses along an optical axis,
- the lens driving unit comprising:
- a shaft that extends parallel to the optical axis;
- a first lens holding frame that holds a first lens of the lenses and has a first coil which, in energized state, causes electromagnetic action between the shaft and the first coil and receives force in a direction along the shaft;
- a second lens holding frame that holds a second lens of the lenses and has a second coil which, in energized state, causes electromagnetic action between the shaft and the second coil and receives force in the direction along the shaft;
- a zoom driving section that moves the first lens along the optical axis by controlling power supplied to the first coil;
- and
- a focusing section that moves the second lens along the optical axis by controlling power supplied to the second coil.
5 more elements
Dependencies are inferred from the claim text.