Optical pickup utilizing nonvolatile memory and adjustment...

Details Optical pickup utilizing nonvolatile memory and adjustment... Optical pickup utilizing nonvolatile memory and adjustment...

2006-01-09

2009-08-04

Agustin, Peter Vincent (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S053340

Reexamination Certificate

active

07570548

ABSTRACT:
This optical pickup has a nonvolatile memory from which data can be electronically read out, and stores as data the difference between the spherical aberration when the readout signal jitter reaches a minimum, and the spherical aberration when the tracking error signal amplitude reaches a maximum. The positioning of an optical detector or detection lens is adjusted so that the focus error signal is almost zero when the readout signal jitter reaches a minimum. The invention provides a method for performing high-precision adjustment of the focus offset and spherical aberration, even in the case of a disk which does not have data recorded on it.

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