Optical pickup capable of detecting and/or compensating for...

Details Optical pickup capable of detecting and/or compensating for... Optical pickup capable of detecting and/or compensating for...

2006-03-28

2006-03-28

Miller, Brian E. (Department: 2652)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S112150, C369S112120

Reexamination Certificate

active

07020051

ABSTRACT:
An optical pickup is provided for a recording medium, including: a light source generating and emitting a light beam; a light beam division and detection unit dividing a particular light beam portion of the light beam after being reflected/diffracted from the recording medium into sub-divided light beams portions, and detecting the sub-divided light beam portions; and a spherical aberration detection circuit processing the sub-divided light beam portions to detect spherical aberration caused by thickness variation of the recording medium.

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U.S. Appl. No. 09/986,454, filed Nov. 8, 2001, Byung-in Ma et al.
U.S. Appl. No. 10/374,715, filed Feb. 27, 2003, Seong-sue Kim et al.

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