Optical servo system for magnetic disk

Details Optical servo system for magnetic disk Optical servo system for magnetic disk

1990-06-18

1992-06-09

Envall, Jr., Roy N.

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

369103, 369109, 369118, 2502015, 356356, 359 15, 359560, G11B 700, G01J 120, G02B 532

Patent

active

051213710

ABSTRACT:
Coherent light passing through slits produces an optical interference pattern having a fringe spacing related to the spacing of the servo tracks on a magnetic disk. The convolution of the interference pattern with the servo tracks generates a quadrature servo error signal.

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patent: 4800547 (1989-01-01), Kessels et al.
patent: 4971414 (1990-11-01), Funato et al.
"An Introduction to the Insite 325 Floptical.RTM. Disk Drive", Jim Godwin, Insite Peripherals, Inc., presented at SPIE Optical Data Storage Topical Meeting (1989).

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