Optical information recording and/or reproducing apparatus

Details Optical information recording and/or reproducing apparatus Optical information recording and/or reproducing apparatus

1990-05-22

1992-10-13

Envall, Jr., Roy N.

Dynamic information storage or retrieval

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

Mechanism control by the control signal

369 32, 369 54, G11B 700

Patent

active

051557193

ABSTRACT:
In an apparatus for recording and/or reproducing information on and/or from an optical record medium having a control track in which information for identifying the relevant optical record medium has been recorded, plural sets of operational condition data for various kinds of optical record media which will be set on the apparatus have been previously stored in a memory unit. Information recorded in a control track of an optical record medium set on the apparatus is first read out to identify a kind of the optical record medium, and then a set of operational condition data is selectively read out of the memory unit in accordance with the identified kind of the optical record medium. The writing and/or reading power of a light beam impinging upon the optical record disc is controlled in accordance with the read out operational condition data to effect the recording and/or reproduction in an optimum manner. The operational condition data may further include time duration data of a recording pulse for optical disks which are driven in the constant angular velocity means.

REFERENCES:
patent: 4490810 (1984-12-01), Hon
patent: 4779252 (1988-10-01), Custers et al.
patent: 4872151 (1989-10-01), Smith

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