Optical pickup device
AssigneeFunai Electric Co., Ltd.
InventorsMika Hamaoka, Tetsuya Shihara
Life of this patent
Estimating the term…
Abstract
An optical pickup device includes: a light source; an objective lens which condenses a light beam that is emitted from the light source on a recording layer of an optical recording medium; and a photo detector which receives reflected light that is reflected by the optical recording medium. Further on an optical path between the light source and the objective lens, a liquid lens which performs correction of spherical aberration by changing state of convergence or divergence of the input light beam and a liquid crystal element on which a plurality of phase shift regions are formed to adjust phase of the input light beam, and which performs correction of the spherical aberration by phase adjustment of the phase shift regions are arranged.
Claims12
An optical pickup device comprising:
- a light source;
- an objective lens which condenses a light beam that is emitted from the light source on a recording layer of an optical recording medium;
- a photo detecting portion which receives reflected light that is reflected by the optical recording medium;
- a liquid crystal element which is disposed on an optical path between the light source and the objective lens, on which a plurality of phase shift regions are formed to adjust phase of the input light beam, and which performs correction of spherical aberration by phase adjustment of the phase shift regions;
- and
- a liquid lens which is disposed on the optical path between the light source and the objective lens, and which performs correction of the spherical aberration by changing state of convergence or divergence of the input light beam.
Dependencies are inferred from the claim text.