Optical pickup and optical disk reproducing device

Details Optical pickup and optical disk reproducing device Optical pickup and optical disk reproducing device

2007-11-20

2007-11-20

Tran, Thang V. (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S112160

Reexamination Certificate

active

10737103

ABSTRACT:
An optical pickup in an optical disk reproducing device is operable to switch operations between a low-power operation mode and a high-power operation mode, and includes a liquid crystal element and a polarization beam splitter, which together attenuate, only in the low-power operation mode, a laser beam emitted by a laser diode onto an optical disk. The liquid crystal element is turned ON only in the low-power operation mode to serve as a polarization rotating element. Working with the polarization beam splitter, the polarization rotating element attenuates a polarized component of the incident light on the optical disk.

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