Apparatus and method for laser noise cancellation in an optical

Details Apparatus and method for laser noise cancellation in an optical Apparatus and method for laser noise cancellation in an optical

1992-10-16

1994-11-08

Dzierzynski, Paul M.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369107, G11B 700

Patent

active

053633636

ABSTRACT:
In an optical storage system, a non-signal radiation component from a laser unit which is leaves the optical path as a result of selection of a signal polarization component for interaction with the optical storage medium is applied to a first detector. The output electrical signal from the first detector is combined with the output electrical signal from the second detector to which the radiation component, which has interacted with the storage medium, is applied. The two electrical signals are combined in a manner to reduce the noise from the laser unit which is superimposed on the signal from the second detector. In the typical read/write head, the non-signal beam can be the deflected radiation from the beam splitter.

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