Checking media operations and recording during optical recording

Details Checking media operations and recording during optical recording Checking media operations and recording during optical recording

1988-09-02

1990-07-10

McElheny, Jr., Donald

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369116, G11B 700

Patent

active

049411390

ABSTRACT:
A magnetooptic recorder player provides for residual data checking and media defect checking. Media defect checking is effected by comparing the reflected light intensity of a modulated optical beam with the input data characteristics. A difference between the input data and the detected light intensities represents asperities in the record media. Residual data is checked by selectively gating MO detected signals during recording, which are intermediate the high intensity light beam pulses used for recording signals. Both the detected residual data and detected media asperities are counted for each addressable record storage area on the medium.

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