Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Siemens Aktiengesellschaft

Wolfgang J Riedel

Helmut Wolf

Gerhard Schmidtke

Roland Grisar

Klaus Gregorius

Armin Lambrecht

Otmar Fichter

Manfred Knothe

Richard Wissler

Raimund Brunner

Gerhard Mattauch

Heinz Schorner

Horst M Preier

An output device digitally stores data on a data carrier. The output device includes a reading unit, a data converter unit, and an output unit, provided with data reconstruction elements. Data to be reproduced can be processed by control data components contained in a start block. The control data components can be stored in a control data storage unit connected to the data reconstruction elements by way of a start block detector unit. This enables fast reproduction of large amounts of data, particularly digitized audio data.

Output device for digitally stored data on a data carrier

In a method and apparatus for determining the concentration of optically-active substances in a fluid, such as glucose in the body fluids of a patient, two light sources are used to produce respective polarized light beams which pass through the substance to be analyzed and are incident on a detector. The second beam has a fixed polarization direction relative to the first beam. The light sources are alternatingly switched on and off at a known-frequency. A dispersing element is disposed in the path of each beam. A comparative signal is produced from the beams exiting the substance and incident on the detector. Due to the presence of the dispersive element in the path of each beam, it is possible to spectrally resolve the components of the comparative signals, so that the optical polarization contributed to the comparative signal by each substance in the fluid can be identified, and thus the concentration of a selected optically-active substance, even in the presence of multiple optically-active substances in the fluid, can be accurately identified.

Method and apparatus for determining the concentration of

Method and apparatus for the quantitative determination of optically

A process and device for measuring the isotope ratio, specifically of stable isotopes, of chemical substances in a gas to be examined, the process including alternately charging a sample cell with a reference gas and a measuring gas containing the gas to be examined; adding a metrologically neutral gas to the gas to be examined; varying the mixing ratio of this measuring gas by changing the share of neutral gas being added; and calculation of the isotope ratio V.sub.p of the substance according to the equation: ##EQU1## The device includes a White cell having mirrors on each end of the longitudinal length of the cell, a pair of first beam openings located on a longitudinal end, a pair of second beam openings in spaced parallelism on the longitudinal sides of the White cell and a gas inlet and gas outlet located near each mirror.

Process and device for measuring isotope ratios

Monochromator arrangement

Device for the cooling of optoelectronic components and use of a flange

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Muelheim, Germany

Wolfgang J Riedel