Abstract: Radiation source for emitting radiation in pulses with a duration and at intervals within chosen ranges, comprising at least one plate-shaped radiant element (1), and at least two electrical conductors coupled to the element(s). The source also includes at least one plate-shaped surrounding, thermally conductive element (2) being thermally coupled to a radiation element at its inner edge, and being thermally coupled to a cooling device (3) at its outer surface.

Abstract: A sensor system for measuring the light absorption in a target, e.g. a gas, comprising a first and a second optical transducer, one of which being a light source and the other being a light receiver, adapted to emit and detect, respectively, light within a chosen range of wavelengths, a partially reflective beam splitter adapted to reflect light to or from said first transducer, and to transmit light to or from said second transducer, and a lens or a group of lenses with a chosen focal length transmitting light to or from said transducers. The beam splitter comprises a first reflecting part and a second transmitting part being different from said first part, and a shield being positioned between said transmitting part and said first transducer.

Abstract: A radiation sensor for determining the direction of incident radiation, which is designed to be able to measure via only one amplification path, within a dynamic range from the sensitivity limit of photodiodes included in the sensor to far above their saturation level. This is made possible by the sensor including a number of equally large resistors in a resistor chain between two tapping points for sensor signals, a number of photodiodes which are connected between the junction points between the resistors in the resistor chain and a bias source, the photodiodes being equidistantly spaced from each other along a line in a plane within which the angle of incidence is intended to be measured, and an optical element which causes incident radiation to illuminate different parts of the line of photodiodes, i.e., the detector row, in dependence on the direction of incidence of the radiation.