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Updated: Jun 10, 2026

Implementation of a Reference Interferometer for Nanodetection
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Published on: April 26, 2014

Sizing fine particles with the phase Doppler interferometric technique.

S V Sankar, B J Weber, D Y Kamemoto

    Applied Optics
    |August 19, 2010
    PubMed
    Summary

    A theoretical model validated the Aerometrics phase Doppler particle analyzer (PDPA). This instrument can achieve +/-0.3 micrometer size resolution for small particles, with optical configuration being key to sizing uncertainty.

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    Area of Science:

    • Fluid dynamics and particle analysis
    • Optical instrumentation and measurement science

    Background:

    • The Aerometrics phase Doppler particle analyzer (PDPA) is a key instrument for particle sizing.
    • Understanding PDPA response characteristics is crucial for accurate measurements.

    Purpose of the Study:

    • To develop and validate a theoretical model for the PDPA.
    • To assess the instrument's size resolution and identify factors influencing measurement uncertainty.

    Main Methods:

    • Utilized Lorenz-Mie theory to create a theoretical model of the PDPA.
    • Experimentally verified the model's predictions.
    • Analyzed the impact of optical configuration on sizing uncertainty.

    Main Results:

    • The theoretical model accurately predicted PDPA response.

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  • Experimental validation confirmed the model's suitability for uncertainty calculations.
  • Achieved size resolutions of +/-0.3 micrometers for particles < 10 micrometers.
  • Demonstrated the significant role of optical configuration in sizing uncertainty.

    • Conclusions:

    • The validated theoretical model provides a reliable tool for PDPA analysis.
    • The PDPA is capable of high-resolution sizing of small particles.
    • Optimizing the optical configuration is essential for minimizing sizing uncertainty in PDPA measurements.