Output adjustment method for lens position sensor of optical...

Details Output adjustment method for lens position sensor of optical... Output adjustment method for lens position sensor of optical...

2008-07-08

2008-07-08

Young, Wayne (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S053280, C369S044290

Reexamination Certificate

active

07397737

ABSTRACT:
A position sensor detects a position of an objective lens for irradiating light onto an optical disk. An output adjustment of the position sensor is used for correcting characteristics change due the change with the passage of time. The position of an objective lens and the output of a position sensor are measured at a reference time, the ratio at the neutral point is determined in advance, and when the device is used, the position of the objective lens and the output of the position sensor are measured. The output level at the neutral point during using the device is calculated from the measurement result and the ratio at the neutral point.

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