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US 2002/0172136 A1Published application
Optical disk apparatus with electrostatic lens actuator
AssigneeFujitsu Limited
InventorsKoichi Tezuka, Hitoshi Komoriya
Life of this patent
Estimating the term…
Abstract
An optical disk apparatus includes an objective lens system for producing a beam spot on an optical disk, a slider movable relative to the optical disk, and a fine tracking mechanism for shifting the beam spot in a radial direction of the optical disk. The objective lens system is composed of a first lens and a second lens. The second lens is held by the slider and disposed closer to the optical disk than the first lens is. The tracking mechanism shifts the second lens in the radial direction of the optical disk for tracking control.
Claims10
An optical disk apparatus comprising:
- an objective lens system for producing a beam spot on an optical disk by converging light from a light source;
- a slider movable relative to the optical disk;
- and
- a fine tracking mechanism for shifting the beam spot in a radial direction of the optical disk;
- wherein the objective lens system includes a first lens and a second lens which is smaller than the first lens and held by the slider, the second lens being closer to the optical disk than the first lens is;
- and
- wherein the fine tracking mechanism shifts the second lens in the radial direction of the optical disk.
4 more elements
Dependencies are inferred from the claim text.