SIMULTANEOUS OPTICAL MEASUREMENT OF PARTICLE
SIZE AND SHAPE
Bernhard Michel, Scientific Consulting, Am Steinbruch 1, D-91126 Rednitzhembach, Germany
Wolfgang Mutter, Fritsch GmbH, Industriestrasse 8, D-55743 Idar-Oberstein, Germany
Abstract.
Conventional optical particle sizers evaluate the dependence of scattered light on the polar angle (angle relative
to the optical axis) in order to determine size distributions of particles. The dependence on the azimuth angle
(around the optical axis) commonly is not considered, although it contains valuable information about particle
shape.
We present a novel optical particle analyzer developed by Fritsch GmbH, which is based on an inverse Fourier
setup. It uses a custom-made silicon sensor to detect the dependence of the scattered light on both polar and
azimuth angle, thus enab领 the simultaneous determination of particle size and shape.
The particle shape analysis is currently restricted to the Fraunhofer regime, starting with a minimum size of 3
m. For the particle size measurement, small- and wide-angle light scattering is evaluated, leading to a possible
dynamic range from 10 nm up to 2 mm.
The main advantages of the new particle analyzer are its cost-efficiency, because it is an all-in-one solution, 法国CORDOUAN 动态光散射纳米粒度仪 法国CORDOUAN ARAGO折光度计 FRITSCH激光粒度仪 FRITSCH激光粒度仪
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