Optical system, optical pickup apparatus, and optical disk...

Details Optical system, optical pickup apparatus, and optical disk... Optical system, optical pickup apparatus, and optical disk...

2006-03-02

2010-02-09

Huber, Paul (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S112290

Reexamination Certificate

active

07660226

ABSTRACT:
The present invention discloses an optical system for extracting signal light components from a beam including the signal light components and stray light components. The optical system includes a condensing optical element situated on an optical path of the beam for condensing the beam, a polarization changing unit for changing the state of polarization of at least one of the signal light components and the stray light components included in the incident beam transmitted through the condensing optical element, and an extracting element for extracting the signal light components included in the beam transmitted through the polarization changing unit.

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Shintani T et al, “Analyses for Design and Disks for Dual-layer Phase Change Optical Disks”, Optical Data Storage Topical meeting 2003 Technical Digest, 2003.

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