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Measurement of Particle Size Distribution in Turbid Solutions by Dynamic Light Scattering Microscopy

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Published on: January 9, 2017

Some space-time statistics of the turbulent point-spread function.

Guy Potvin¹, J Luc Forand, Denis Dion

¹Defence Research and Development Canada, Québec, Canada. guy.potvin@drdc-rddc.gc.ca

Journal of the Optical Society of America. A, Optics, Image Science, and Vision

|February 16, 2007

Summary

This study analyzes the point-spread function (PSF) in optical turbulence, deriving irradiance and center-of-mass fields. Results are compared to experimental data, offering insights into atmospheric propagation effects.

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Area of Science:

Optics and atmospheric physics.
Wave propagation through turbulent media.

Background:

Optical imaging systems are affected by atmospheric turbulence.
Understanding turbulence effects is crucial for accurate remote sensing and imaging.

Purpose of the Study:

To theoretically analyze the point-spread function (PSF) in weak optical turbulence.
To derive and characterize irradiance and center-of-mass fields from the PSF.
To compare theoretical correlations with experimental data for validation.

Main Methods:

Derivation of scalar total irradiance and center-of-mass vector fields from the PSF.
Calculation of theoretical space-time autocorrelation and cross-correlation functions.
Comparison with experimental data from the VAMPIRA measurement trial.

Main Results:

Theoretical models for irradiance and center-of-mass field correlations were developed.
Comparison with VAMPIRA data provided validation of the theoretical framework.
The study quantifies the impact of atmospheric surface layer turbulence on imaging.

Conclusions:

The derived theoretical framework accurately models the effects of weak optical turbulence.
Experimental validation confirms the utility of the derived fields for characterizing propagation.
Future work can extend this to stronger turbulence and different atmospheric conditions.