Contactless optical glide head using at least two concurrent interference signals and a multi-channel light detector for detecting disk asperities

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United States of America Patent

PATENT NO 8576407
APP PUB NO 20110149299A1
SERIAL NO

12645205

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Abstract

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A device for detecting disk asperities. The device includes an optical glide head. The glide head is not required to physically contact a disk for detection of the disk asperities. The optical glide head includes a waveguide configured to transmit light onto the disk and receive reflected light from the disk.

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Patent Owner(s)

  • HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS B.V.;WESTERN DIGITAL TECHNOLOGIES, INC.

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Flechsig, Karl Los Gatos, US 4 92
Singh, Gurinder San Jose, US 12 68
Strand, Timothy San Jose, US 4 41

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