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An Optical Technique for Analysis of the Behaviour of Flying Heads in Computer Disc Files

Andrews, Ian (1975) An Optical Technique for Analysis of the Behaviour of Flying Heads in Computer Disc Files. Japanese journal of applied physics, 14 (Suppl.). pp. 373-377. ISSN 0021-4922

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Abstract

The evolution of computer disc files to the current levels of high density information storage
has resulted in the development of high sensitivity, low-flying recording heads. An interferometer
is described which was designed especially for the analysis of the flight characteristics of such
heads. It is capable of detecting nano-metres differential motion between a head and disc in the
presence of several tens of micro-metres of disc run-out. To achieve this mode of operation, differential
design and polarisation effects have been employed. The final instrument has, in addition
to fulfilling its design requirement, proved to be a versatile high precision measurement tool.

Item Type: Article
Additional Information: Proceedings of the ICO Conference on optical metods in scientific and industrial measurements, Tokyo, 26-30 August 1974
Subjects: Q Science > QC Physics
Schools: School of Art, Design and Architecture
Depositing User: Graham Stone
Date Deposited: 23 Oct 2009 15:29
Last Modified: 28 Jul 2010 18:49
URI: http://eprints.hud.ac.uk/id/eprint/5996

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