Optical pickup device

Details Optical pickup device Optical pickup device

2006-04-14

2009-11-17

Nguyen, Hoa T (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S112290, C369S112050, C369S053260

Reexamination Certificate

active

07619960

ABSTRACT:
An optical pickup device using a laser beam comprising: a light-emitting element; a collimating lens; an objective lens; and a light-receiving element, wherein the laser beam emitted from the light-emitting element is converged on a recording surface of an optical disc to be disposed through a path related to the collimating lens and the objective lens, and the converged laser beam is entered to the light-receiving element reversely passing through the path after being reflected on the recording surface of the optical disc, the optical pickup device comprising: a front monitor light-receiving element for receiving a part of the laser beam emitted from the light-emitting element and detecting the amount of the laser beam; and an optical guiding member for guiding a part of the laser beam to the front monitor light-receiving element.

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