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.

Abstract: The invention relates to a spectral fluorometer arrangement including at least one laser light source, particularly for use in measuring the luminescence in the course of a qualitative and quantitative determination of a sample material, the region of which to be excited is arranged in the object point of an emission monochromator and spectrograph, respectively, a holographic grating of said monochromator being provided with a central opening for passage of the exciting laser beam, and beam directing means are provided outside of the plane of symmetry of said emission monochromator and spectrograph, respectively.

Abstract: A time dispersed sensor tube has a photocathode for receiving light images and converting them to photoelectrons. An anode adjacent the photocathode has a slit-diaphragm for accelerating photoelectrons and passing them to slit-jaws by way of a shutter electrode and counterelectrode. A deflection system is provided behind the slit-jaws for directing the photoelectrons to a screen. A short magnetic electron lens between the deflection system and the screen focuses the photoelectrons.

Abstract: The invention relates to a spectral fluorometer arrangement including a laser light source, particularly for use in measuring the luminescence in the course of a qualitative and quantitative determination of a sample material, comprising a beam splitter inserted between said laser light source and a tunable dyestuff laser, at least one collective lens and grey wedge arranged in each of the two beams resulting after said beam splitter, beam fusing means for fusing both beams and positioning the latter in a sample material to be excited. By virtue of the invention a plurality of laser beams can be superimposed in the sample material and can be time correlated.