Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Effect of Particle Contamination of Objective Lens in a CD-ROM Drive on Laser Diode Power and Photo Diode RE Signal

CD-ROM 드라이브의 대물렌즈 입자오염이 레이저 다이오드 파워와 포토 다이오드 RF 신호에 미치는 영향

  • 배양일 (연세대학교 대학원 기계공학과) ;
  • 이재호 (연세대학교 대학원 기계공학과) ;
  • 황정호 (연세대학교 기계공학부)
  • Published : 2004.01.01
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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％.

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References

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