Multiple recording layer focusing of a light spot with an addition of zoom lens
AssigneeSamsung Electronics Co., Ltd.
InventorJong-ryull Kim
Life of this patent
Estimating the term…
Abstract
An optical pickup apparatus for an optical disk having multiple recording layers. Said apparatus includes a fixed optical system for emitting light toward the optical disk and receiving light reflected from the optical disk, a spot forming device for focusing light emitted from the fixed optical system to form a beam spot on the optical disk, and a spot zooming device for zooming the beam spot formed by the spot forming means onto a desired recording layer selected from the multiple recording layers of the optical disk.
Claims8
An optical pickup apparatus for an optical disk, the optical disk having multiple recording layers, said apparatus comprising:
- a fixed optical system for emitting light toward the optical disk and receiving light reflected from the optical disk;
- means for focusing light emitted from said fixed optical system to form a beam spot on the optical disk;
- and
- means for zooming the beam spot formed by said means for focusing onto a desired recording layer selected from among the multiple recording layers of the optical disk.
Dependencies are inferred from the claim text.