Institut Fuer Physikalische Hochtechnologie E.v.

Cs Clean Systems Ag

Leibniz-Institut Fur Photonische Technologien E.v.

Rainer Riesenberg

Joachim Wiechers

Jürgen Popp

Eckard Kopatzki

J&uuml;rgen Sch&ouml;neich

Norbert Lenk

Torsten Diehl

Karina Weber

Mario Kanka

An apparatus for measuring the concentration of a substance in a specimen. The apparatus includes a housing that defines a chamber for the specimen. A radiation source mounted to the housing emits radiation at a wavelength at which the radiation is absorbed by the substance. Two spaced apart receivers are mounted to the housing. Both receivers detect radiation at the wavelength at which it is absorbed by the specimen. Two concave mirrors are disposed in the housing. The mirrors are positioned to split the radiation emitted by the source into two beams, each of the beams being directed to a separate one of the receivers and so that the paths of travel of the beams from the source to the separate receivers are of different lengths. The concentration of the substance is determined by based on the difference in radiation detected by the receivers.

Analysis apparatus

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.

Hadamard spectrometer

Growing community of inventors

Jena, Germany

Rainer Riesenberg