Optical disc apparatus for recording the RF signal component in

Details Optical disc apparatus for recording the RF signal component in Optical disc apparatus for recording the RF signal component in

1993-07-21

1999-08-10

Young, W. R.

Dynamic information storage or retrieval

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

Mechanism control by the control signal

369 50, 369 54, G11B 700

Patent

active

059369213

ABSTRACT:
An optical disc apparatus for recording/reproducing desired information, e.g. a "write once, read many times" optical disc system, is described. It is desired to securely detect speed information and address data recorded in a pregroove, even when the position of incidence of the light beam with respect to the light receiving element has been changed. Output signals of light receiving surfaces of an optical pickup adjacent to each other in the received radial direction of an optical disc have their relative signal levels corrected so that the signal levels of RF components mixed into these output signals are equalized to each other. A difference signal thereof is then generated to recover the speed information and address data.

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