• Title/Summary/Keyword: Optical Fourier transform

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Characterization of Microscale Objects based on the Diffraction Pattern Analysis (회절무늬를 이용한 미세물체의 특성 측정)

  • 강기호;전형욱;손정영;오명환
    • Korean Journal of Optics and Photonics
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    • v.2 no.1
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    • pp.1-6
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    • 1991
  • This paper describes the theoretical analysis of a diffraction pattern analyzer for the characterization of microscale object fields and a method for obtaining size and size distribution from the measured diffraction pattern of the object fields. For the experimental verification, a typical optical Fourier transform system was set up and calibrated with 2 5$\mu \textrm m$ and 50$\mu \textrm m$ pinholes. The system responses to distilled water droplets, alcohol, glycerin and silicon oil were imaged with vidicon, and the image was processed to determine the size distribution of each liquid particle field. The energy distribution function which is defined as the total intensity of a circular ring in the diffraction pattern was used to determine the dominant particle size of each liquid particle field.

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