Optical disk apparatus and optical disk processing method

Details Optical disk apparatus and optical disk processing method Optical disk apparatus and optical disk processing method

2006-11-07

2006-11-07

Wellington, Andrea (Department: 2627)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S053280, C369S044370, C369S044410

Reexamination Certificate

active

07133343

ABSTRACT:
An optical disk apparatus has a first optical system having an objective lens with a first NA, a second optical system having an objective lens with a second NA lower than the first NA, an addition mechanism for adding focus error signals detected by the first and second optical systems, and an alignment mechanism for aligning the objective lens in accordance with the addition result of the addition mechanism.

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English translation of JP 2000-11401A.
European Search Report for European Patent Application No. 01 11 6739 dated Oct. 28, 2004.

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