Lens driving device, information recording and playback apparatus, and electronic instrument
AssigneeKabushiki Kaisha Toshiba
InventorsYasuaki Hadame, Kazuo Watabe
Life of this patent
Estimating the term…
Abstract
According to one embodiment, a lens driving device includes a fixed member, a movable member, a support part, and a coil. The movable member is configured to retain a lens and a magnet. The supporting part is configured such that a guide member placed substantially in parallel with a lens optical axis supports the movable member at plural positions symmetric with respect to the lens optical axis while the movable member is movable in a direction of the lens optical axis with respect to the fixed member. The coil is configured such that a driving force is generated for the movable member by interaction with the magnet provided in the fixed member.
Claims10
A lens driving device comprising:
- a fixed member;
- a movable member configured to retain a lens and a magnet;
- a support part configured to support the movable member at a plurality of positions that are symmetric with respect to an optical axis of the lens such that the movable member is configured to move in an optical axis direction of the lens with respect to the fixed member using a guide member substantially in parallel with the optical axis of the lens;
- and
- a coil configured to generate a driving force for the movable member by interaction with the magnet in the fixed member.
An information recording and playback apparatus comprising:
- a lens driver, the lens driver comprising:
- a fixed member;
- a movable member configured to retain a lens and a magnet;
- a support part configured to support the movable member at a plurality of positions that are symmetric with respect to an optical axis of the lens such that the movable member is configured to move in an optical axis direction of the lens with respect to the fixed member using a guide member substantially in parallel with the optical axis of the lens;
- and a coil configured to generate a driving force for the movable member by interaction with the magnet in the fixed member,
- wherein information is recorded in and played back from an information recording medium by irradiating the information recording medium with a laser beam through the lens driven in the optical axis direction by the lens driver.
An information recording and playback apparatus comprising:
- a lens driver configured to be able to drive a lens at frequencies higher than 10 Hz in an optical axis direction of the lens, the lens being on an optical path between a light source and an objective lens, an optical disk being irradiated with light emitted from the light source through the objective lens,
- wherein information is recorded in and played back from the optical disk by irradiating the optical disk with the light through the lens driven in an optical axis direction by the lens driver.
Dependencies are inferred from the claim text.