Method and apparatus for verifying recording data and for determ

Details Method and apparatus for verifying recording data and for determ Method and apparatus for verifying recording data and for determ

1992-12-30

1996-05-14

Neyzari, Ali

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

369 54, 369 58, G11B 1100, G11B 1112

Patent

active

055174710

ABSTRACT:
A light beam is applied to an information recording medium to record information. A light amount of the light beam reflected by the recording medium is detected simultaneously with the recording of information. A defect of the recording medium is detected by comparing the detected light amount with a reference value. When a degree of the detected defect exceeds a predetermined level, the information is rerecorded on another portion of the recording medium.

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