Patent ID: 7907279
Filing Date: 2011-03-15
Classification: G01N

Abstract:
1. An apparatus for determining at least one of the particle size and the particle shape of a mixture of particles, comprising a feeding device, which passes the mixture of particles through a zone of measurement as a particle flow, an illumination module, which generates illumination beams and illuminates the zone of measurement with them, a detection module comprising two cameras, each recording an area of the zone of measurement assigned to the respective camera, said cameras recording the areas with different magnifications, and comprising an evaluating module, which determines at least one of the particle size and the particle shape on the basis of the recordings of the cameras, wherein the illumination module is provided such that it illuminates the two areas with different intensities, and wherein one of the two areas is smaller than the other area and the illumination module illuminates the smaller area with a greater intensity than the greater area.