Abstract: A rotor for an electric machine, includes a laminated core which has magnet pockets extending in an axial direction, a plurality of first permanent magnet arrangements and a plurality of second permanent magnet arrangements. Each magnet arrangement includes a plurality of magnet elements arranged in the axial direction. The magnet arrangements are arranged one in each magnet pocket. The magnet elements of second magnet arrangements extend in each case along an axial transition portion in which opposite free ends of a pair of adjacent magnet elements of the first magnet arrangements are arranged.

Abstract: The invention relates to a transmitted-light refractometer wherein a slit diaphragm is imaged on a diode array through a cuvette holding the sample. The cuvette itself is arranged in the telecentric beam path. The exit window of the cuvette has several regions in which the inner surfaces of the exit window are inclined differently to the inner surface of the entry window. In this way, several slit images are generated on the diode array and the relative spacings of these images are independent of a possible disadjustment of the condenser and the objective. An embodiment of the invention permits the simultaneous measurement of the refractive index and the absorption of the sample.

Abstract: In order to improve the sensitivity and the spectral resolution in measuring the luminescence of diverse sample materials, adapted optical imaging relationships at variable excitation output are provided for the different optical paths of the luminescence light emitted by the sample material. An excitation bundle of rays which can be stopped down and the central beam of the secondary beam which emanates from the sample material, are directed to be parallel to one another. A mount is displaceable along the parallel bundles of rays, the sample material and a collecting optical member being fastened on the mount at a distance from one another equal to the focal length of this optical member.