Invention Grant
US08477580B2 Objective lens, optical pickup, and optical drive device 失效
物镜,光学拾取器和光驱装置

Objective lens, optical pickup, and optical drive device
Abstract:
Provided is an objective lens, which is provided in an optical pickup including a spherical aberration correction mechanism which performs a spherical aberration correction with respect to laser light applied to a recording layer of an optical recording medium, having the recording layer on which information can be recorded at a plurality of positions in a depth direction, via the objective lens, and a tilt correction unit which varies a lens tilt angle which is a tilt angle of the objective lens, thereby performing a tilt correction.
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