Abstract: Light sources are provided for generating rays of light of different excitation wavelengths, which can be directed toward the sample support by excitation optics. The fluorescent light emitted each time by the sample support can be directed toward a receiver, which generates corresponding fluorescence signals. A mirror assembly with reflective areas and transparent areas is connected between the different light sources and the sample support. The mirror assembly can be displaced in such a manner that the ray of light of a light source passes through a transparent area and reaches the sample support.

Abstract: Fluorescing reference material is used for calibration purposes for improving the measurement accuracy of sensors, especially biosensors, which use fluorescence radiation for determination of signals, the sensors each comprising a waveguide having at least one wave propagation surface as assay, a reactant being supported on the surface, the reactant comprising a species of molecule and being bound to an analytical material within a test medium, the waveguide transmitting an output emission radiation signal when it receives a radiation access signal.

Abstract: The invention relates to a device for detecting different fluorescence signals of a sample support illuminated with different excitation wavelengths. Said sample support comprises a number of samples that can be exited by different light wave-lengths for emitting differing fluorescent light. To this end, light sources (1, 3) are provided for generating rays of light or different excitation wavelengths, which can be directed toward the sample support (9) by excitation optics (5, 11). The fluorescent light (23, 45) emitted each time by the sample support (9) can be directed toward a receiver (25), which generates corresponding fluorescence signals. A mirror assembly (19) with reflective areas (19′) and transparent areas (19″) is connected between the different light sources (1, 3) and the sample support (9).

Abstract: Fluorescing reference material is used for calibration purposes for improving the measurement accuracy of sensors, especially biosensors, which use fluorescence radiation for determination of signals, the sensors each comprising a waveguide having at least one wave propagation surface as assay, a reactant being supported on the reactant comprising a species of molecule and being bound to an analytical material within a test medium, the waveguide transmitting an output emission radiation signal when it receives a radiation access signal.

Abstract: To compensate for disturbing influences during arc welding of at least two optical waveguide fiber ends, an impedance of the discharge path of the arc is measured and at least one of the welding parameters is varied based on the measured impedance.