Optical-component-integrated optical pickup
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsShinichi Ijima, Kazuhiko Yamanaka, Kazutoshi Onozawa, Hideyuki Nakanishi
Life of this patent
Estimating the term…
Abstract
An optical pickup is equipped with: an enclosure which contains an optical system including a semiconductor laser and an objective lens; a fixed member; and an elastic supporting member which has conductivity and movably supports the enclosure. A plurality of pairs of driving coils are each positioned in the enclosure so as to be symmetrical with respect to an optical axis of a laser beam. The plurality of pairs of driving coils generate magnetic forces with a plurality of magnets or the like, to drive the enclosure in a focusing direction and a tracking direction.
Claims10
An optical pickup comprising;
- a semiconductor laser which emits a laser beam;
- an objective lens which focuses the emitted laser beam on an optical recording medium;
- an enclosure which contains an optical system that includes the semiconductor laser and the objective lens;
- an elastic supporting member which movably supports the enclosure;
- and
- a plurality of pairs of driving coils which are contained in the enclosure, each pair being positioned symmetrically with respect to an optical axis of the laser beam,
- wherein the laser beam passes through a space formed between the plurality of pairs of driving coils in a path that is substantially parallel with a surface of the optical recording medium, and
- wherein the plurality of pairs of driving coils generate magnetic forces with a plurality of magnets, to drive the objective lens at least in a focusing direction and a tracing direction.
An optical pickup comprising;
- a semiconductor laser which emits a laser beam;
- an objective lens which focuses the emitted laser beam on an optical recording medium;
- an enclosure which contains an optical system that includes the semiconductor laser and the objective lens;
- an elastic supporting member which movably supports the enclosure;
- and
- a plurality of magnets which are contained in the enclosure and positioned symmetrically with respect to an optical axis of the laser beam,
- wherein the laser beam passes through a space formed between the plurality of magnets in a path that is substantially parallel with a surface of the optical recording medium, and
- wherein the plurality of magnets generate magnetic forces with a plurality of pairs of driving coils, to generate magnetic fluxes for driving the objective lens at least in a focusing direction and a tracking direction.
Dependencies are inferred from the claim text.