Optical disc drive, optical pickup and optical component...

Details Optical disc drive, optical pickup and optical component... Optical disc drive, optical pickup and optical component...

2011-08-23

2011-08-23

Young, Wayne R (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S112090, C369S112110, C369S112140, C369S112210

Reexamination Certificate

active

08004956

ABSTRACT:
Provided are an optical pick up and an optical component used for the optical pickup which are capable of preventing or restraining occurrence of deviation and unbalance which are caused by assembly errors during manufacturing of optical components, a temperature variation or the like. The optical pickup comprises a laser, a polarization changeover element for changing over a direction of polarization of an optical beam emitted from the laser, a beam splitting element for splitting the laser beam into a plurality of optical paths in accordance with a direction of a polarization, a plurality of objective lenses for focusing laser beams onto a recording layer of the optical disc, a rise-up mirror, and a plurality of coupling lenses arranged respectively intermediate of the plurality of optical paths led to the plurality of objective lenses. The rise-up mirror is arranged intermediate of the plurality of optical paths led to the plurality of objective lenses and adapted to be used common to respective optical beams on the plurality of optical paths. The plurality of the coupling lenses are coupled to and held on one and the same drive portion.

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