Dynamic information storage or retrieval – Dynamic mechanism subsystem – Having power driven transducer assembly
Patent
1986-09-19
1989-09-26
Stephan, Steven L.
Dynamic information storage or retrieval
Dynamic mechanism subsystem
Having power driven transducer assembly
356358, 360 7811, 360 7812, G11B 700, G11B 2504, G11B 2102
Patent
active
048706353
ABSTRACT:
The invention uses a small sized, low cost, high accuracy, semiconductor laser interferometer to position the transducer in a disc storage system. Light is reflected back over the path to be measured and directly back into the semiconductor laser. This causes the power present in the laser to be varied. Unexpectedly, the output of the photosensor associated with the laser has an asymmetric, sawtooth waveform.
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Block Timothy R.
Enstrom Mark R.
Luecke Francis S.
Shidler Karl A.
Soderstrom Ronald L.
International Business Machines - Corporation
Lahtinen Robert W.
Stephan Steven L.
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