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Sensing System for Measuring Deflection of Microcantilever

마이크로 캔틸레버 굽힘 측정을 위한 센싱시스템

  • Received : 2011.12.19
  • Accepted : 2012.07.16
  • Published : 2012.09.01

Abstract

This paper presents a sensing system to measure the deflection of a microcantilever in an atomic force microscope. In general, the optical lever method and interferometry are used for the sensing system; however, their size and cost leaves considerable room for improvement. Therefore, we used an optical pickup head whose operating principle is based on the astigmatism of the commercial optical disk drives. The developed sensing system was applied to a laboratory atomic force microscope, and satisfactory results were obtained.

원자현미경에서 시편의 높이정보를 얻기 위한 마이크로 캔틸레버의 굽힘은 optical lever 방식이나 간섭원리에 기반한 방식으로 이루어졌으나, 부피와 가격적인 측면에서 이들 방식은 많은 개선의 여지를 가지고 있다. 따라서 본 논문에서는 이전 방식의 단점을 극복하기 위하여, 간단한 구조로 구현이 가능한 비점 수차방식을 기반으로한 광픽업헤드를 이용하여 마이크로 캔틸레버의 굽힘 측정시스템을 개발하였다. 개발된 시스템은 실험실에서 제작한 원자현미경에 적용하여 그 가능성을 확인하였다.

Keywords

References

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