Optical system for optical disc

Details Optical system for optical disc Optical system for optical disc

2004-12-17

2010-11-23

Ortiz Criado, Jorge L (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S053190, C369S044320

Reexamination Certificate

active

07839731

ABSTRACT:
There is provided an optical system for an optical disc which requires a numerical aperture larger than or equal to 0.60. The optical system is provided with a light source, an objective lens, and a driving system that controls a position and an attitude of the objective lens. The driving system operates to move the objective lens in a direction perpendicular to a central axis of the objective lens for a tracking operation, and to change the attitude of the objective lens during the tracking operation so that the central axis on a light source side tilts toward the light source.

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English translation of JP 2002251767 A.
English Language Abstract of JP 8-62496.
English Language Abstract of JP 8-334686.
English Language Abstract of JP 64-25113.
English language translation of JP 1-196740.

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