Abstract
Scattering is a useful tool for the determination of particle size in solution. In particular, spectroscopic analysis of backscattering renders the possibility of a simplified experimental setup and direct data processing using Mie theory. We show that a simple technique based on near-infrared (NIR) backscattering spectroscopy together with the development of the corresponding algorithm based on Fourier transform (FT) and Mie theory are a powerful tool for sizing microparticles in the range from 8 to diameter. There are three wavelength intervals in the NIR, within which different diameter ranges were analyzed. In each one, the FT yields a coarse diameter value with an uncertainty dependent on the wavelength range. A more accurate value is obtained by further applying cross correlation between experimental and theoretical spectra. This latter step reduces the uncertainty in diameter determination between and , depending on wavelength interval and particle diameter. These results extend previous information on visible backscattering spectroscopy applied to sizing microparticles in the range between 1 and diameter. This technique could be the basis for the construction of a portable and practical instrument.
© 2006 Optical Society of America
Full Article | PDF ArticleMore Like This
Jing Zhou, Fred Moshary, Barry Gross, and Samir Ahmed
Appl. Opt. 45(26) 6876-6885 (2006)
Brendan M. Heffernan, Yuli W. Heinson, Justin B. Maughan, Amitabha Chakrabarti, and Christopher M. Sorensen
Appl. Opt. 55(12) 3214-3218 (2016)
Sergey Bondarenko, Andrey Ovcharenko, Yuriy Shkuratov, Gorden Videen, Jay Eversole, and Matthew Hart
Appl. Opt. 45(16) 3871-3877 (2006)