Abstract: A method and arrangement for compensation of thermally induced depolarising effects in an optical resonator employ a retroreflective prism effecting multiple instances of total internal reflection as one end mirror of the resonator. The retroreflective prism has a first roof edge face pair made of two perpendicular roof edge faces and at least one second face with total internal reflection or a second roof edge face pair. Laser radiation entering parallel to the optical axis of the resonator undergoes total internal reflection through an angle ? at the second face or the second roof edge face pair before it undergoes total internal reflection at the first roof edge face pair and emerges again from the retroreflective prism in a manner parallel to the optical axis of the resonator following another instance of total internal reflection at the second face or the second roof edge face pair.

Abstract: A fibre laser assembly includes a pump laser assembly for optical pumping of an active fibre with first pump radiation of a first pump wavelength and means for the generation of second pump radiation at a second pump wavelength, which lies between the first pump wavelength and the wavelength of the seed laser. Doping concentration, length of the active fibre, and power of the first pump radiation are coordinated such that the active fibre absorbs the first pump radiation in the first fibre portion to >90%, the radiation of the second pump wavelength in the first fibre portion is amplified by the first pump radiation to generate the second pump radiation, and the laser radiation of the seed laser is amplified in the remaining second fibre portion by the second pump radiation.

Abstract: A device is provided for ultrasound-based reflection and transmission tomography. A plurality of ultrasonic transducers are held around an imaging volume to be filled with an ultrasonic coupling medium, the transducer holder having an opening for inserting, into the imaging volume, at least one part of a body to be imaged. During imaging, the body to be imaged is supported, where a support-member-opening allows access to the transducer holder by at least one part of the body. A diaphragm is arranged across the support-member-opening such that a center of a diaphragm-opening is placed substantially at a predetermined position. The ultrasonic coupling medium flows out of the imaging volume when at least one part of the body to be imaged is inserted into the imaging volume filled with the ultrasonic coupling medium and/or during imaging.

Abstract: A separating installation for separating magnetic and non-magnetic particles present in a suspension includes a stirring stage having a stirrer configured to create the suspension, a filter stage configured to filter the suspension according to grain size by at least one particle filter, and a screening stage having at least one wet screen. The separating installation further includes a magnetic filter stage having at least one magnetic filter. The stirring stage, the filter stage, the screening stage, and the magnetic stage are interconnected by a pipe system in such a way that they form a circuit.

Abstract: The invention relates to a method (110) for producing an electrically conductive connection (112, 112?) on a substrate (114), comprising the following steps: a) providing a substrate (114), wherein the substrate (114) is configured for receiving an electrically conductive connection (112, 112?); b) providing a reservoir of an electrically conductive liquid alloy, wherein the reservoir has a surface at which the alloy has an insulating layer; c) providing a capillary (120) configured for taking up the electrically conductive liquid alloy; d) penetrating of a tip (122) of the capillary (120) under the surface of the reservoir and taking up of a portion of the alloy from the reservoir; and e) applying the portion of the alloy at least partly to the substrate (114) in such a manner that an electrically conductive connection (112, 112?) is formed from the alloy on the substrate (114), wherein the alloy remains on the substrate (114) by adhesion.

Abstract: The invention relates to an optical waveguide component and to a method for the production thereof.

Abstract: A perceived gamut (PG) of a physical display device presenting frames of an image sequence to a human viewer may be increased. An interface of the system receives a sequence of frames from an image sequence source with each frame having input color data associated with each pixel of the respective frame, the input color data being given in a specified color space. A perceived color computation module computes for each particular frame of the received image sequence perceived colors of each pixel and a frame-specific adapted white point. An optimizer module applies a chromatic adaptation transformation to each window frame to determine display gamut adjusted perceived colors of each pixel of the respective frame and an error per window frame. The chromatic adaptation transformation is updated for all window frames to minimize the determined error, and the current frame is output to the display.

Abstract: An apparatus for producing methanol from carbon dioxide. The apparatus includes a first circulation process for a circulating water and methanol which includes an absorption stage for carbon dioxide, a desorption stage with a hydrogen feed, a first heat exchanger, an outlet, a circulation pump, and an expansion throttle. The second circulation process for methanol, water, carbon dioxide and hydrogen includes the desorption stage, a first liquid-gas phase separation stage with a return conduit for liquid phases to the desorption stage, and a gas outlet from and an inlet into the desorption stage. The third circulation process for carbon dioxide and hydrogen includes a methanol synthesis reactor, a gas outlet of the first liquid-gas phase separation stage which opens out into the third circular conduit and an inlet into which the third circular conduit opens, a second heat exchanger, a gas outlet in the third circular conduit, and a fan.

Abstract: Direct thermal decomposition of hydrocarbons into solid carbon and hydrogen is performed by a process and a device. The process comprises preheating a hydrocarbon gas stream to a temperature between 500° C. and 700° C. and injecting the pre-heated hydrocarbon gas stream into the reactor pool of a liquid metal reactor containing a liquid media; forming a multi-phase flow with a hydrocarbon gas comprising hydrogen and solid carbon at a temperature between 900° C. and 1200° C.; forming a carbon layer on the free surface of the liquid media made up of solid carbon particles which are then displaced into at least one carbon extraction system and at least one recipient for collecting them; and, at the same time, the gas comprising hydrogen leaves the reactor pool through a porous rigid section, being collected at a gas outlet collector from where the gas comprising hydrogen finally leaves the liquid metal reactor.

Abstract: The invention relates to an assembly for optical coupling and for mode-selective separation or overlaying of optical fields, to the use thereof and to a method for producing a waveguide-based optical coupling element (10) which is designed for mode-selective separation or overlaying of optical fields at a further optical coupling point (410) of an optical component (400).

Abstract: The invention relates to an apparatus (112) and to a method (210) for generating cryogenic temperatures.

Abstract: The invention relates to a power supply (110, 110? . . . ) for transporting electrical energy from an energy source (144) to a device (148) or from the device (148) to the energy source (144), the energy source (144) being arranged in a warm region (142) and the device (148) being arranged in a cold region (146). The power supply (110, 110?) has a stack (118) comprising at least two films (120, 120? . . . ), each film (120, 120? . . . ) comprising an electrically conductive material which is designed to transport the electrical energy, ach film (120, 120? . . . ) having an electrical connection which is designed to receive the electrical energy or to deliver the electrical energy, and each film (120, 120? . . . ) comprising a plurality of flow channels (128) for conveying a fluid stream, and the fluid stream comprising a refrigerant mixture or a gas stream to be cooled or a gas stream to be liquefied. The films (120, 120?, . . .

Abstract: The invention relates to a method and to an assembly (200) for localizing an optical coupling point (11) and to a method for producing a microstructure (100) at the optical coupling point (11).

Abstract: A waveguide component includes a waveguide, which is at least partially transparent or translucent with respect to light and is set up in such a way that light can be conducted at least partially through the waveguide. The waveguide includes a waveguide core, a first casing region, and a second casing region. The waveguide core is formed from one or more spatially separated elements of at least one waveguide core material. The first casing region, which includes at least one electro-optical material, interacts with light guided in the waveguide. The first casing region is disposed around the one or more elements of the waveguide core. The second casing region includes at least one dielectric material. The second casing region is arranged around the first casing region and/or the waveguide core. The waveguide component further includes at least two line regions that are at least partially electrically conductive.

Abstract: A composition for photoluminescence of the chemical formula M2(1-y-z)Yb2yRem2zADO5-xF2x, a method for producing said composition, and uses of said composition are provided.

Abstract: The invention relates to a method for identifying one or more spectral features in a spectrum (4, 5) of a sample for a constituent analysis of the sample, comprising providing the spectrum (4, 5), predefining an approximation function (6), which is a continuously differentiable mathematical function, respectively forming an (n?1)-th order derivative (7, 8, 9) of the spectrum (4, 5) and of the approximation function (6), wherein the number n>1, generating a correlation matrix (10) from the two (n?1)-th order derivatives (7, 8, 9), and respectively identifying the spectral feature or one of the spectral features in each case as a function of a local extremum (i) of the correlation matrix (10) for at least one extremum (i) of the correlation matrix (10) in order to simplify the constituent analysis of the sample.

Abstract: The present invention is related to an electrode active material for a lithium-ion battery of general formula (I): Li1+x(NiaCobMncMd)1?xO2 wherein x is in the range of from zero to 0.1, a is in the range of from 0.1 to 0.5, b is in the range of from 0.4 to 0.9, c is in the range of from zero to 0.3, d is in the range of from zero to 0.1, M is selected from Al, B, Mg, W, Mo, Ti, Si and Zr, with a+b+c+d=1 and a>c. In addition, the present invention is related to a method of manufacture of electrode active materials and to their use.

Abstract: The invention relates to a reactor, preferably microreactor, for methanation, and to the operation of this reactor, i.e. to the process regime for preparation of methane.

Abstract: An apparatus for a selective fractionation of ultrafine particles includes at least three separating columns fluidically connected in series by connecting lines. An infeed is arranged to feed into a connecting line which is arranged upstream of each separating column. Each connecting line comprises an inlet for a suspension of ultrafine particles to be separated and an inlet for at least one additional mobile phase. The inlets are alternately operated. A discharge branches off from a connecting line which is arranged downstream of each separating column. Each connecting line comprises an outlet for a first and a second discharge suspension of the ultrafine particles. The outlets are alternately operated. A control means provides a simultaneous switching of the through-flow switching position of the shutoff valves at the inlets and outlets. At least one magnetic field source for a magnetic field is arranged in each separating column.

Abstract: The invention relates to a method (110) for producing an electrically conductive connection (112, 112?) on a substrate (114), comprising the following steps: a) providing a substrate (114), wherein the substrate (114) is configured for receiving an electrically conductive connection (112, 112?); b) providing a reservoir of an electrically conductive liquid alloy, wherein the reservoir has a surface at which the alloy has an insulating layer; c) providing a capillary (120) configured for taking up the electrically conductive liquid alloy; d) penetrating of a tip (122) of the capillary (120) under the surface of the reservoir and taking up of a portion of the alloy from the reservoir; and e) applying the portion of the alloy at least partly to the substrate (114) in such a manner that an electrically conductive connection (112, 112?) is formed from the alloy on the substrate (114), wherein the alloy remains on the substrate (114) by adhesion.