Institut Fuer Physikalische Hochtechnologie E.v.

Norbert Lenk

Rainer Riesenberg

J&uuml;rgen Sch&ouml;neich

Torsten Diehl

The invention relates to a Hadamard spectrometer which enables the detection of a range of polyatomic gases or liquids for example using infrared absorption. The aim of the invention is to produce a spectrometer of this type which provides higher resolution, improved wavelength precision and an improved signal-to-noise ratio using conventional detector lines and which allows a small and compact design. To this end, a detector line (,) with a set interval (a) between the individual detector areas (,) is used for a detector unit (,), and a linear assembly (,) is also used for a light-emitting respective reflective assembly (,). The linear assembly includes (n) adjoining identical light sources (,), n always remaining &gE;3, which can be activated individually according to the Hadamard Principle. The individual light sources (,) are positioned at an interval (b) from each other in such a way that b is an integral multiple of a plus or minus 1/n when they are projected onto the detector line.

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Ilmenau, Germany

Norbert Lenk