Abstract: The invention relates to an interferometer for carrying out an optical coherence tomography. The interferometer has at least one first part (13) and a second part (14) which are arranged or can be arranged in a spatially separated manner, wherein the two parts (13, 14) are optically connected together by at least one optical fiber (8). The aim of the invention is to provide an interferometer comprising parts which are optically connected by at least one fiber and which can be moved relative to each other, said parts and fiber being as insusceptible as possible to polarization changes induced by movement and temperature changes. The invention is characterized in that the optical fiber (8) is designed as a polarizing fiber which prefers the propagation of a first light wave with a set first polarization state or polarization mode and impedes the propagation of second light waves with different polarization states or polarization modes than those of the first light wave.

Abstract: A multi-valve for distributing at least one fluid, includes a plurality of input channels for supplying a respective fluid, a plurality of output channels for discharging the fluid, wherein a respective input channel can be connected via a plurality of input branches to a respective, substantially coaxially arranged output branch of the respective different output channels, and a switch plate which is arranged in a gap between the input branches and output branches and can be translationally moved transversely to the input branches and output branches in order to open and/or close a connection of the respective input branch to the respectively assigned output branch, wherein the switch plate is connected to an endless belt.

Abstract: In order to achieve the aim of the invention, which is to provide an operating microscope which allows images of tissue structures to be captured and displayed as accurately as possible, an operating microscope comprising a first camera device (1) for capturing and displaying a reflection image of an object is characterised by a second camera device (2) for simultaneously capturing and displaying a further image of the object.

Abstract: In view of the problem of specifying an arrangement and a method by means of which an eye can be measured preferably without artifacts and quickly, an arrangement for measuring an eye (1), comprising a light source (2) which is suitable for emitting light rays (3, 4) to the cornea (5) of an eye (1) and a control unit (6) which drives the light source (2) to emit the light rays (3, 4) and is suitable for converting reflected light rays (3a, 4a, 4b) entering the arrangement into signals (7, 8), is characterized in that the light source (2) when driven by the control unit (6) emits a central light ray (3) and emits a plurality of peripheral light rays (4) which are radially offset with respect to the central light ray (3) or in that the light source (2) when driven by the control unit (6) emits a plurality of peripheral light rays (4) radially offset with respect to one another, Moreover, a method is specified.

Abstract: The invention relates to an assembly comprising a interferometer for carrying out an optical coherence tomography, wherein the interferometer is divided into two spatially spaced-apart interferometer parts (1, 2), wherein the two interferometer parts (1, 2) can be moved related to one another and are optically connected to one another via flexible light guides (3, 4, 5), which bridge the spatial distance, wherein according to the invention, an assembly having an interferometer is provided, which is as unsusceptible as possible to the effects brought about by bending a tube cable packet and allows for an optimum signal-to-noise ratio or an optimum image quality of an OCT image, characterised in that at least one first flexible light guide (3) is designed as a polarisation-maintaining light guide consisting of two connected polarisation-maintaining light-guiding fibres (3a, 3b).

Abstract: A multi-valve for distributing at least one fluid, includes a plurality of input channels for supplying a respective fluid, a plurality of output channels for discharging the fluid, wherein a respective input channel can be connected via a plurality of input branches to a respective, substantially coaxially arranged output branch of the respective different output channels, and a switch plate which is arranged in a gap between the input branches and output branches and can be translationally moved transversely to the input branches and output branches in order to open and/or close a connection of the respective input branch to the respectively assigned output branch, wherein the switch plate is connected to an endless belt. (FIG.

Abstract: A bearing bushing (1) and to a method for manufacturing a bearing bushing are provided. The bearing bushing includes a wire article (2) formed from knitted wire mesh or knitted wire fabric (6) and compressed into a dimensionally stable compressed product (3). The bearing bushing can be provided for supporting a throttle valve used in high-temperature applications. The wire article (2) is formed from a stainless steel. Existing voids (10) of the compressed product (3) are filled with solder (4).

Abstract: A catheter pump having a drive unit and a catheter. The catheter has a pump head for inserting into the aorta and having a rotatably arranged rotor shall for driving an expandable conveying element provided on the pump head and has, at the proximal end thereof, a coupling section, which is connected to the rotor shaft for conjoint rotation and which can be rotated about a coupling axis. The drive unit having a drive and a drive section, which can be driven in rotation about a drive axis by the drive, the coupling section and/or the drive section having magnet elements for contactless mutual rotational coupling. The coupling and drive axes being spaced from each other by a distance a in the perpendicular direction in such a way that the magnetic field of the magnet elements pushes the coupling section in a direction extending perpendicularly to the coupling axis.

Abstract: A bearing bushing (1) and to a method for manufacturing a bearing bushing are provided. The bearing bushing includes a wire article (2) formed from knitted wire mesh or knitted wire fabric (6) and compressed into a dimensionally stable compressed product (3). The bearing bushing can be provided for supporting a throttle valve used in high-temperature applications. The wire article (2) is formed from a stainless steel. Existing voids (10) of the compressed product (3) are filled with solder (4).

Abstract: A catheter pump having a drive unit and a catheter. The catheter has a pump head for inserting into the aorta and having a rotatably arranged rotor shall for driving an expandable conveying element provided on the pump head and has, at the proximal end thereof, a coupling section, which is connected to the rotor shaft for conjoint rotation and which can be rotated about a coupling axis. The drive unit having a drive and a drive section, which can be driven in rotation about a drive axis by the drive, the coupling section and/or the drive section having magnet elements for contactless mutual rotational coupling. The coupling and drive axes being spaced from each other by a distance a in the perpendicular direction in such a way that the magnetic field of the magnet elements pushes the coupling section in a direction extending perpendicularly to the coupling axis.

Abstract: The invention relates to a method for signal processing in optical coherence tomography by means of a tunable light source (swept source), comprising the following steps: tuning the light source and sensing a signal intensity of the light source in linear dependence on the respective wave number (k) of the tunable light source and producing a signal intensity distribution in dependence on k; applying a window function to the sensed signal intensity distribution and producing a weighted signal intensity distribution; and applying a fast Fourier transform (FFT) to the weighted signal intensity distribution; and characterized in that, in the tuning of the light source, the tuned frequency spectrum is limited to a passband of the window function.

Abstract: A method and a system for detecting a movement of a surface on an irradiated sample involves a light source for irradiating the surface with a coherent light beam, a detector for detecting variations caused by the movement in a speckle pattern produced by reflections of the light beam at the surface, selecting a single speckle from the speckle pattern, and detecting the variations at the selected speckle.

Abstract: The invention relates to a method for signal processing in optical coherence tomography by means of a tunable light source (swept source), comprising the following steps: tuning the light source and sensing a signal intensity of the light source in linear dependence on the respective wave number (k) of the tunable light source and producing a signal intensity distribution in dependence on k; applying a window function to the sensed signal intensity distribution and producing a weighted signal intensity distribution; and applying a fast Fourier transform (FFT) to the weighted signal intensity distribution; and characterized in that, in the tuning of the light source, the tuned frequency spectrum is limited to a passband of the window function.

Abstract: A method and a system for detecting a movement of a surface on an irradiated sample involves a light source for irradiating the surface with a coherent light beam, a detector for detecting variations caused by the movement in a speckle pattern produced by reflections of the light beam at the surface, selecting a single speckle from the speckle pattern, and detecting the variations at the selected speckle.

Abstract: The invention relates to a newly identified polynucleotide sequence comprising a gene that encodes a novel lipolytic enzyme from Aspergillus niger The invention features the full length nucleotide sequence of the novel gene, the cDNA sequence comprising the full length coding sequence of the novel lipolytic enzyme as well as the amino acid sequence of the full-length functional protein and functional equivalents thereof. The invention also relates to methods of using these enzymes in industrial processes and methods of diagnosing fungal infections. Also included in the invention are cells transformed with a polynucleotide according to the invention and cells wherein a lipolytic enzyme according to the invention is genetically modified to enhance its activity and/or level of expression.

Abstract: The invention relates to newly identified gene sequences that encode novel proteases obtainable from Aspergillus niger. The invention features the full length gene sequence of the novel genes, their cDNA sequences as well as the full-length functional protein and fragments thereof. The invention also relates to methods of using these enzymes in industrial processes and methods of diagnosing fungal infections. Also included in the invention are cells transformed with DNA according to the invention and cells wherein a protease according to the invention is genetically modified to enhance or reduce its activity and/or level of expression.

Abstract: In an exhaust system of a motor vehicle, a tailpipe cover is disposed on the exhaust pipe and protrudes through a cutout in the vehicle rear part with a defined gap clearance. In a hot condition, where a length of the exhaust system is increased due to thermal expansion, a greater clearance arises between the edge of the cutout and the tailpipe cover than in the cold condition. The tailpipe cover is trumpet cone shaped.

Abstract: The invention relates to a polyester based on a polycondensation product of terephthalic acid and/or terephthalic acid derivatives comprising bivalent alcohols. Said polyester is characterised in that (I) between 40 and less than 90 mol. % of ethylene glycol, propane-1,3-diol and/or butane-1,4-diol is combined with (II) between 60 and more than 10 mol. % alkane-1,2-diol, exclusively ethylene glycol, and the polyester has a melting point of between approximately 145 and 250° C. (in accordance with DIN EN ISO 53765). It has a comparatively low melting point, such that it can be retreated at the lower melting temperature. This prevents undesired secondary and decomposition reactions during the retreatment, and enables energy costs to be reduced. The inventive polyester is especially suitable for producing fibres or filaments by melt-spinning, and films, bottles and other moulded parts according to an injection moulding method. The fibres can be treated to form a high-quality nonwoven material.

Abstract: The invention relates to a newly identified polynucleotide sequence comprising a gene that encodes a novel lipolytic enzyme from Aspergillus niger The invention features the full length nucleotide sequence of the novel gene, the cDNA sequence comprising the full length coding sequence of the novel lipolytic enzyme as well as the amino acid sequence of the full-length functional protein and functional equivalents thereof. The invention also relates to methods of using these enzymes in industrial processes and methods of diagnosing fungal infections. Also included in the invention are cells transformed with a polynucleotide according to the invention and cells wherein a lipolytic enzyme according to the invention is genetically modified to enhance its activity and/or level of expression.

Abstract: The invention relates to a newly identified polynucleotide sequence comprising a gene that encodes a novel lipolytic enzyme from Aspergillus niger. The invention features the full length nucleotide sequence of the novel gene, the cDNA sequence comprising the full length coding sequence of the novel lipolytic enzyme as well as the amino acid sequence of the full-length functional protein and functional equivalents thereof. The invention also relates to methods of using these enzymes in industrial processes and methods of diagnosing fungal infections. Also included in the invention are cells transformed with a polynucleotide according to the invention and cells wherein a lipolytic enzyme according to the invention is genetically modified to enhance its activity and/or level of expression.