Contact detection using laser modulation

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United States of America Patent

PATENT NO 9202499
APP PUB NO 20140269819A1
SERIAL NO

13802386

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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An apparatus is arranged to detect contact between an air bearing surface of a transducer and a medium using a modulated thermal sensor signal. A laser source produces modulated laser light. A thermal sensor is disposed at or near the air bearing surface and is subject to cyclic heating by the modulated laser light. The thermal sensor is configured to produce the modulated sensor signal in response to the cyclic heating.

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Patent Owner(s)

  • SEAGATE TECHNOLOGY LLC

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Johnson, Michael Thomas Minneapolis, US 26 208
Kiely, James Dillon Edina, US 28 440
Macken, Declan Prior Lake, US 91 1104
Scheppers, Karl Edina, US 1 56

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