Optical pickup device

Details Optical pickup device Optical pickup device

2006-11-14

2006-11-14

Korzuch, William (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

Reexamination Certificate

active

07136332

ABSTRACT:
An optical pickup device has a semiconductor in which 2 light emitters laser emitting laser beams having different wavelengths for a DVD and CD are mounted on one package and disposes optical-system lenses with reference to a main beam for a DVD such that a long axis of an elliptic beam which is emitted from each light emitter for a CD and DVD and irradiated onto a disc is tilted at about 35° to the radius direction of a disc. This prevents an aberration from being generated in a converging spot at the DVD side due to image height and exhibits sufficient performance of lens to keep all CT, MTF and jitter in comparatively favorable conditions.

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