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

Institut Fur Mikrotechnik Mainz Gmbh

Institut Fuer Mikrotechnik Mainz Gmbh

Fraunhofer-Gesellschaft Zur Förderung Der Angewandten Forschung E.v.

Ines Frese

Klaus-Stefan Drese

Thomas Klotzbücher

Michael Maskos

Elzbieta Nahrstedt

Jens Hossfeld

A method for detecting Raman scattered light using at least one interference filter and a detection unit, the Raman scattered light to be detected including an incoming scattered light signal, wherein the method includes the following steps: * a first filtered scattered light signal is generated by the application of a first transmission function to the incoming scattered light signal, the first transmission function being assigned to a first optical path length Lthrough a first interference filter, and the first transmission function defining a first spectral band δλ; * a second filtered scattered light signal is generated by the application of a second transmission function to the incoming scattered light signal, the second transmission function being assigned to a second optical path length L≠Lthrough the first interference filter or through a second interference filter, and second transmission function defining a second spectral band δλ; and * the first and the second filtered scattered light signals are detected by the detection unit.

Method, device and system for detecting raman scattered light

A charge avalanche photodetector system (CAPD system) is provided comprising a charge avalanche photodetector based on the charge avalanche principle and amplifier electronics, where the amplifier electronics are electrically connected downstream of the charge avalanche photodetector, with the charge avalanche photodetector being able to be selectively operated with a voltage bias Vor without the voltage bias V.

Charge avalanche photodetector system

The invention relates to a method for determining the average radius of gyration (r) of particles with a size of &#x2264;1 &#x3bc;m in a suspension, and to a device for carrying out the method according to the invention. The method is based on the scattering of linearly polarised electromagnetic radiation on nanoparticles, which, suspended in a solution, are moved through a through-flow cell. The irradiation is carried out perpendicular to the movement direction, wherein the scattering intensity is measured via at least four detectors that are arranged in a defined plane at defined angles. Alternatively, at least one mirror can be used in the position of at least one of the detectors, which deflects the radiation to at least one detector. Based on the scattering intensities, both the average radius of gyration (r) of the particles as well as the concentration thereof in the suspension can be determined.

Method for determining the average radius of gyration of particles with a size of less than or equal to 1 micron in a suspension, and device for carrying out the method

A method for determining the glucose value in blood or in interstitial liquids and to a glucose sensor including a catheter which has one or more openings in the region of the distal end of the catheter; a first optical waveguide which is arranged in the catheter and which includes a coupling surface at the distal end of the optical waveguide; a measuring probe which is arranged in the region of the distal end of the catheter, is coupled to the coupling surface of the first optical waveguide, and has a mirror arranged opposite the coupling surface of the first optical waveguide and a detection chamber between the coupling surface of the first optical waveguide and the mirror; a detection liquid for glucose in the detection chamber; and a membrane which encloses at least the detection chamber filled with the detection liquid and which has a separation capacity of maximally 20 kDA.

Glucose sensor

The present invention concerns a measurement chip () for carrying out measurements of transmission and/or emission and/or scattering of light by a fluid sample in an operator unit, wherein the measurement chip has a base plate () produced from a transparent polymer material, provided in the base plate () are at least one measurement cell () for receiving a fluid sample and fluid passages () for supplying and discharging fluid to and from the measurement cell (), and provided in and/or on the base plate () outside the measurement cell () are mirror surfaces () which are so arranged that they direct light emitted from and/or scattered by a fluid sample in the measurement cell () from the measurement chip (), preferably in the direction of a light detector provided in an operator unit.

Measurement chip

The invention relates to a method of waterproofing the surface of a polymer work piece. The aim of the invention is to prevent liquid or gaseous, hydroxyl-group (OH group) containing substances, such as water, vapor or glycerol, from diffusing into a polymer surface. To this end, the work piece is treated with at least one organic solvent that blisters the surface of the polymer work piece, thereby diffusing at least one waterproofing agent dissolved in the solvent into the surface of the polymer work piece, said waterproofing agent being a silicon-organic compound. The solvent is allowed to react and is then removed from the polymer work piece, whereby at least a part of the waterproofing agent remains bound in the surface of the polymer work piece. The inventive method provides a means for treating, in one steep bath, polymer work pieces or work pieces with polymer surfaces of any shape and size and also polymer surfaces with cavities and bulges in a simple and cost-effective manner, requiring only small quantities of the waterproofing agent and extremely little time. The so treated polymer work piece can be used in areas of high temperature and/or regions with high ambient temperatures.

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Mainz, Germany

Ines Frese