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US 8,824,253 B2Granted
Optical pickup and optical system using the same
AssigneeToshiba Samsung Storage Technology Korea Corporation
InventorsUi-yol Kim, Ji-sun Ahn, Yong-jae Lee
Life of this patent
Estimating the term…
Abstract
Provided are an optical pickup and an optical system using the same. The optical pickup may include an aperture that is disposed at a side where a light beam is incident on an objective lens. The aperture may limit a range of the light beam such that a width of the light beam incident on the objective lens in a first direction is less than a width in a second direction that is perpendicular to the first direction.
Claims18
An optical pickup comprising:
- an optical unit comprising at least one light source configured to emit a light beam for recording/reproducing information to/from an information storage medium, and at least one photodetector configured to detect an information signal and/or an error signal by detecting a light beam reflected from the information storage medium;
- an objective lens configured to focus a light beam incident from the optical unit on the information storage medium;
- and
- an aperture that is disposed at a side at which the light beam is incident from the optical unit on the objective lens, and configured to limit a range of the light beam such that a width of the light beam incident on the objective lens in a first direction corresponding to a height direction of the optical pickup is less than a width in a second direction that is perpendicular to the first direction,
- wherein the aperture is integrally formed with the objective lens.
2 more elements
An optical pickup comprising:
- an optical unit comprising at least one light source configured to emit a light beam for recording/reproducing information to/from an information storage medium, and at least one photodetector configured to detect an information signal and/or an error signal by detecting a light beam reflected from the information storage medium;
- an objective lens configured to focus a light beam incident from the optical unit on the information storage medium, the objective lens comprising an entrance pupil that has an oblong shape, the light beam being emitted from the light source with its axis parallel to a short side of the oblong shape, and
- an aperture configured to be formed with the objective lens.
An optical system comprising:
- an optical pickup configured to move in a radial direction of an information storage medium and configured to record and/or reproduce information to and/or from the information storage medium, the optical pickup comprising:
- an objective lens configured to focus a light beam incident from an optical unit on the information storage medium, and
- an aperture comprising an entrance pupil that has an oblong shape, the light beam being emitted with its axis parallel to a short side of the oblong shape,
- wherein the aperture is integrally formed with the objective lens;
- and
- a control unit configured to control the optical pickup.
3 more elements
Dependencies are inferred from the claim text.