Method for detecting defects on magneto-optic recording medium

Details Method for detecting defects on magneto-optic recording medium Method for detecting defects on magneto-optic recording medium

1992-01-23

1994-10-18

Hajec, Donald

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

360 59, 360 46, G11B 390, G11B 509, G11B 502

Patent

active

053574974

ABSTRACT:
A method for detecting defects by detecting defects a magneto-optic property of a magneto-optic recording medium. A signal with constant frequency is recorded on a recording layer of the magneto-optic recording medium, and positive and negative side waveforms of the reproduced constant frequency signal obtained through play of the recording medium are integrated separately. The level of each of these integrated values and a reference level are compared, and a level drop of the peak value is detected.

REFERENCES:
patent: 4346411 (1982-08-01), Buhler et al.

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