Optical pickup

Details Optical pickup Optical pickup

1998-04-15

2000-10-31

Edun, Muhammad

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 58, 369112, 369 4423, G11B 7095

Patent

active

061413046

ABSTRACT:
An optical pickup includes a laser light source emitting a laser beam, an objective lens collecting the laser beam, and a wavefront-aberration correcting device provided on an optical axis of the laser beam and adapted to change a refractive index by controlling voltage. During reproduction of an optical disk, the wavefront-aberration correcting device corrects a wavefront aberration occurring due to a tilting of the optical disk, or corrects both the wavefront aberration occurring due to the tilting of the optical disk and a wavefront aberration due to the thickness of a substrate of the optical disk.

REFERENCES:
patent: 5859818 (1999-01-01), Tateishi et al.
patent: 5914923 (1999-06-01), Araki et al.

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