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http://dx.doi.org/10.3795/KSME-B.2004.28.1.066

Effect of Particle Contamination of Objective Lens in a CD-ROM Drive on Laser Diode Power and Photo Diode RE Signal  

Pae, Yang-Il (연세대학교 대학원 기계공학과)
Lee, Jae-Ho (연세대학교 대학원 기계공학과)
Hwang, Jung-Ho (연세대학교 기계공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.28, no.1, 2004 , pp. 66-71 More about this Journal
Abstract
Airborne contaminant particles are intruded into optical disk drive(ODD) due to the flow caused by disk rotation and can be adhered to objective lens, which causes read/write errors. Such a phenomenon can be a serious problem for high-density storage devices. The purpose of this paper is to understand the effect of particle contamination of objective lens in a CD-ROM drive on laser diode power and photo diode RF signal. The measurements of laser power and readout RF signal were carried out by using a laser power meter and a time interval analyzer, respectively. The parameters for estimating a readout-signal' distortion were its jitter and amplitude. Alumina(Al$_2$O$_3$) particles were used as test dust particles. The results show that the failure for data access happened as the degree of lens contamination was greater than 20％.
Keywords
ODD; Laser Power; Objective Lens; Dust Particle; Contamination; Radio Frequency Signal;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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