Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Large areal particle counting system with CMOS image sensor

CMOS 이미지 센서를 이용한 광영역 입자 계수기

  • Lee, Seung-Jun (School of Electrical Engineering and Computer Science, Seoul National University) ;
  • Seo, Yeong-Tai (School of Electrical Engineering and Computer Science, Seoul National University) ;
  • Ko, Yul (School of Electrical Engineering and Computer Science, Seoul National University) ;
  • Ji, Chang-Hyeon (School of Electronics Engineering, Ewha Womans University) ;
  • Kim, Yong-Kweon (School of Electrical Engineering and Computer Science, Seoul National University)
  • 이승준 (서울대학교 전기컴퓨터 공학부) ;
  • 서영태 (서울대학교 전기컴퓨터 공학부) ;
  • 고율 (서울대학교 전기컴퓨터 공학부) ;
  • 지창현 (이화여자대학교 전자공학과) ;
  • 김용권 (서울대학교 전기컴퓨터 공학부)
  • Published : 2011.07.20
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Abstract

In this paper, particle counting system using a CMOS image sensor is demonstrated. The system utilizes a linear photodetector array as a detection element. Therefore, the particles are detected by large detection region, in contrast to a single detector in conventional particle counting devices, while maintaining the sensitivity. The advantage of proposed system is that particles are detected in a relatively large area without using the particle focusing method. Also, proposed system can be easily integrated with a microfluidic chip by attaching the device underneath the bottom plate of the microfluidic chip. Detection of polystyrene microbeads has been tested at a flow rate of 4.89mm/s. For 21 measurements, proposed system showed an average count error of 7.29% and a standard deviation of 4.74%. Potentially, the proposed system can detect even smaller particles simply by utilizing a higher resolution CMOS image sensor.

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