Abstract: A device (1) is described and represented for the determination of the particle size and/or the particle shape and/or optical properties, such as transparency, of particles (2) in a particle stream (3), with a feeding device (4) for the feeding of the particles (2) to a measuring zone (5), wherein the particles (2) flow through the measuring zone (5), with at least one illuminating device (6) for illuminating the measuring zone (5), with at least two camera devices (7, 8), each of which photographs a measurement region (9, 10) of the measuring zone (5) associated with the corresponding camera device (7, 8), wherein a first camera device (7) photographs a first, preferably larger, measurement region (10) with a first, preferably lesser, magnification and a second camera device (8) photographs a second, preferably smaller, measurement region (9) with a second, preferably stronger, magnification, with an imaging optics (11) for imaging the measurement regions (9, 10), and with an evaluating device for determinin

Abstract: A device (1) is described and represented for the determination of the particle size and/or the particle shape and/or optical properties, such as transparency, of particles (2) in a particle stream (3), with a feeding device (4) for the feeding of the particles (2) to a measuring zone (5), wherein the particles (2) flow through the measuring zone (5), with at least one illuminating device (6) for illuminating the measuring zone (5), with at least two camera devices (7, 8), each of which photographs a measurement region (9, 10) of the measuring zone (5) associated with the corresponding camera device (7, 8), wherein a first camera device (7) photographs a first, preferably larger, measurement region (10) with a first, preferably lesser, magnification and a second camera device (8) photographs a second, preferably smaller, measurement region (9) with a second, preferably stronger, magnification, with an imaging optics (11) for imaging the measurement regions (9, 10), and with an evaluating device for determinin

Abstract: An apparatus for determining the sizes and/or shapes of particles which are conveyed as a particle flow through a measuring section is disclosed. An illumination device illuminates the particle flow in the measuring section from the rear side. A camera records shadow projections of the particles illuminated by the illumination device from the front side. An analysis unit determines the particle size and/or particle shape via the camera pictures. A projection device is disposed on the front side of the measuring section and positioned at an angle ? to the camera in order to project a light line onto the particles of the particle flow in the measuring section. The light line is recorded by the camera, depth information and/or geometric information on the recorded particles being determined from the shape of the light line in the analysis unit.