Optical disk unit capable of restraining changes in light...

Details Optical disk unit capable of restraining changes in light... Optical disk unit capable of restraining changes in light...

2007-05-29

2007-05-29

Huber, Paul W. (Department: 2627)

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

C369S053270, C369S112010

Reexamination Certificate

active

11187847

ABSTRACT:
The present invention relates to an optical head device and an optical disk unit using the same. The optical head device includes a relay lens control unit to control at least one of lenses of a relay lens unit based on an output signal outputted from a first optical detector and a power control circuit to control an intensity of a light beam emits from a light source.

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