Physical Optics, Diffractive Optics

Sizing particles by backscattering spectroscopy and Fourier analysis

[+] Author Affiliations
Fabian A. Videla

Universidad Nacional de La Plata, Facultad de Ingeniería, La Plata, Argentina and Centro de Investigaciones Opticas, CIOp, (CONICET-CICBA), CC 124, B 1902 WAB, La Plata, Argentina

Daniel Schinca, Lucía B. Scaffardi

Universidad Nacional de La Plata, Facultad de Ingeniería, La Plata, Argentina and Centro de Investigaciones Opticas, CIOp, (CONICET-CICBA), CC 124, B 1902 WAB, La Plata, Argentina

Opt. Eng. 45(4), 048001 (April 13, 2006). doi:10.1117/1.2192507
History: Received March 31, 2005; Revised July 27, 2005; Accepted September 05, 2005; Published April 13, 2006
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Optical single backscattering spectroscopy can be used for sizing particles suspended in aqueous solution. In this work, we present results of backscattering spectroscopy applied to the determination of radii of calibrated spherical latex microparticles when a beam of white light is incident on the sample. From Mie calculations and Fourier analysis, we can determine the radius of particles covering the range between 0.5 and 12μm for monomodal samples, with a mean error of 0.7μm. To improve the accuracy, a correlation algorithm is applied that reduces the uncertainty in more than an order of magnitude and compares to the traceable error given by the manufacturer. The method can be also applied to bimodal and trimodal samples, allowing the separation of different size components.

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© 2006 Society of Photo-Optical Instrumentation Engineers

Citation

Fabian A. Videla ; Daniel Schinca and Lucía B. Scaffardi
"Sizing particles by backscattering spectroscopy and Fourier analysis", Opt. Eng. 45(4), 048001 (April 13, 2006). ; http://dx.doi.org/10.1117/1.2192507


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