Optical disc apparatus

Details Optical disc apparatus Optical disc apparatus

2007-08-14

2007-08-14

Psitos, A M (Department: 2625)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044250, C369S053180

Reexamination Certificate

active

10475473

ABSTRACT:
An optical disk apparatus having a high reliability by evading collision between a condensing lens and an optical disk regardless whether the focus control is in the operative state or in the inoperative state, thereby preventing damage to the condensing lens and the optical disk. When the focus control is in the inoperative state, by using a reflection light amount from the optical disk (1), it is ascertained that the focus of the light beam is in the vicinity of the information surface and the condensing lens (15) is driven to be apart from the optical disk (1).

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MAT (machine assisted translation of) JP 10-116423.

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