Sensing contamination level in an optical storage device

Details Sensing contamination level in an optical storage device Sensing contamination level in an optical storage device

1993-09-23

1995-03-07

Young, W. R.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369 4432, 369 4435, 369 54, 369 4428, G11B 7085

Patent

active

053964764

ABSTRACT:
The present invention provides an apparatus and method for sensing the contamination level in an optical storage device and for issuing a signal when the contamination exceeds a predetermined value relative to a base value. The tracking error signal gain of an optical drive is monitored and compared with a base gain. An alert signal is then generated if the actual measured gain exceeds a predetermined level relative to the base gain, whereupon a cleaning device can be mounted in the storage device and optical elements cleaned.

REFERENCES:
patent: 4356390 (1982-10-01), Feilchenfeld
patent: 4568183 (1986-02-01), Douglas
patent: 4942564 (1990-07-01), Hofer et al.
patent: 5134602 (1992-07-01), Baca et al.

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