Apparatus for recording information on a primary optical disk to

Details Apparatus for recording information on a primary optical disk to Apparatus for recording information on a primary optical disk to

1995-09-06

1998-04-14

Tran, Thang V.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4438, G11B 7085

Patent

active

057401381

ABSTRACT:
A primary optical disk recording apparatus comprises a first light source for recording a signal on a primary optical disk, an objective lens for converging a light beam from the first light source on the primary optical disk, a second light source for detecting a focus error between the objective lens and the primary optical disk, and a controller for detecting a reflection light beam from the first light source, which is reflected from the primary optical disk, while the signal is being recorded on the primary optical disk, and for subjecting a signal of the reflection beam to an arithmetic operation process, thereby detecting a first focus error signal and controlling the focus error on the basis of the first focus error signal.

REFERENCES:
patent: 5040165 (1991-08-01), Taii et al.
patent: 5295125 (1994-03-01), Oonishi et al.
patent: 5339300 (1994-08-01), Akatsuka et al.
patent: 5367512 (1994-11-01), Satou et al.

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