Optical pickup device

Details Optical pickup device Optical pickup device

2007-11-20

2010-12-14

Agustin, Peter Vincent (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

Reexamination Certificate

active

07852735

ABSTRACT:
A diffraction element is disposed between a beam branching element (such as a beam splitter) and a photodetector. The diffraction element further segment an interference fringe introduced into stray light by a diffraction grating which divides a laser beam emitted from a laser beam source into a main beam and two sub-beams.

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Chinese Office Action for corresponding CN Application No. 200710188645.2, dated Sep. 18, 2009, pp. 1-13.

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