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Title: Hard disk wobble detection using optical triangulation and time-delay integrated imaging
Authors: Ng, T.W. 
Sin, H.K.
Keywords: Time-delay Integrated imaging
Issue Date: Apr-2003
Citation: Ng, T.W., Sin, H.K. (2003-04). Hard disk wobble detection using optical triangulation and time-delay integrated imaging. Optical Engineering 42 (4) : 935-938. ScholarBank@NUS Repository.
Abstract: Wobbling limits the access speed and data storage density in hard disks. A method using optical triangulation of a projected linear array of light beams and time-delay integrated (TDI) imaging was explored to obtain the tilt distribution as the hard disk was rotated. This resulted in fringe image records. A fast-Fourier transform scheme was applied to process the fringe images for more accurate results using the technique. During experimental verification, the technique was shown to reveal the distribution of tilt of a typical hard disk rotating at 2000, 4000, and 6000 rpm. © 2003 Society of Photo-Optical Instrumentation Engineers.
Source Title: Optical Engineering
ISSN: 00913286
DOI: 10.1117/1.1556392
Appears in Collections:Staff Publications

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