Objective lens moving control method and apparatus

Details Objective lens moving control method and apparatus Objective lens moving control method and apparatus

2006-12-05

2006-12-05

Wellington, Andrea (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044270, C369S044290

Reexamination Certificate

active

07145842

ABSTRACT:
In a layer jump, a control signal based on a focus error signal is masked in a period based on a moving speed of an objective lens so as not to be influenced by an unnecessary light component. Thereafter, an observation of the control signal based on the focus error signal is restarted, and a brake signal is sent to the objective lens, and a focus servo is switched to the ON status. Thus, accuracy of the layer jump is improved when the unnecessary light component exists in an interlayer portion of the focus error signal.

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patent: 2000-155955 (2000-06-01), None

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