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Wide-range and accurate particle sizing using extended interferometric particle imaging technique.

Jie Xu1, Baozhen Ge1, Qieni Lu1

  • 1School of Precision Instrument and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China.

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This study introduces an extended interferometric particle imaging (IPI) technique using multiple imaging systems to accurately measure particles across a wider size range, from 10 μm to 1 mm.

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Area of Science:

  • Optical Engineering
  • Particle Imaging
  • Metrology

Background:

  • Accurate measurement of particles across a wide size range is challenging with traditional interferometric particle imaging (IPI).
  • Existing IPI methods have limitations in achieving broad size measurability.

Purpose of the Study:

  • To develop an extended interferometric particle imaging (IPI) technique for enhanced particle size measurement range.
  • To investigate the impact of scattering angles and polarization on IPI measurements.

Main Methods:

  • Proposed an extended IPI technique incorporating double or multiple imaging systems.
  • Utilized different scattering angles and polarizations to capture fringe patterns.
  • Analyzed the effects of particle size, scattering angle, polarization, and system parameters on fringe patterns.

Main Results:

  • The extended IPI technique significantly widened the measurable particle size range to 10 μm-1 mm for water droplets.
  • High-quality fringe patterns were obtained, improving measurement accuracy.
  • Relative deviations in extracted diameters were within 9%.

Conclusions:

  • The extended IPI technique offers a robust solution for accurate particle sizing over an expanded size range.
  • This method enhances the capability of interferometric techniques in particle metrology.