Abstract: The present invention relates to an optical composite component, in particular for use as an optical light guide element or in an optical light guide element, and to methods for the production thereof. Furthermore, the invention includes the use of the optical composite component as or in an optical light guide element, in particular in the field of augmented reality.

Abstract: A process for producing and/or checking an assembly of a substrate stack includes: planarly arranging at least one first substrate against a second substrate to form the substrate stack, the at least one first substrate and the second substrate being arranged directly against one another or on one another, so that at least one contact area is formed between the least one first substrate and the second substrate at which the at least one first substrate is in direct planar contact with the second substrate, the at least one first substrate including a transparent material; detecting a radiative reflection which comes about through irradiation of the substrate stack with a radiative input on the at least one contact area; and ascertaining a first bond quality index (Q1) of the contact area from the radiative reflection.

Abstract: An element of an inorganic brittle material is provided having two opposed sides and a circumferential edge. The element has at least three sections that include a first section and two second sections. The second sections adjoin the first section so that the first section is between the second sections. The first section has an arrangement of openings and interconnectors so that the first section has a higher flexibility than the second sections. The arrangement of openings has at least one opening shaped as a fold with two limbs that intersect to form a vertex.

Abstract: A method for physically modifying at least one of at least one region of a surface of a substrate and at least one portion of the substrate, the substrate comprising a multicomponent glass, the method comprising the steps of: providing an apparatus and the substrate, the apparatus including a radiation source configured for generating a particle beam; feeding the substrate to the apparatus and applying a vacuum; modifying at least one of the at least one region of the surface of the substrate and the at least one portion of the substrate by an exposure to the particle beam.

Abstract: A method for the manufacture of a finished glass tube with closed ends and a ventilation hole includes: providing a glass tube with open ends including a first end and a second end; opening a ventilation hole in a wall of the glass tube near one of the ends of the glass tube; closing the first end of the glass tube; closing the second end of the glass tube; and introducing a gas into the glass tube through the ventilation hole with a radial gas supply during at least one of the closings of the first end or the second end of the glass tube.

Abstract: An electrical feedthrough assembly includes pins, insulating material, and a base body including a first side, a second side, and through-holes, the pins being sealed in the through-holes by the insulating material, a coefficient of thermal expansion of the insulating material being smaller than a coefficient of thermal expansion of the base body, a stepped through-hole including a surface portion and a middle portion, the surface portion being adjacent to a first side or a second side of the base body and including a first diameter, the middle portion including a second diameter smaller than the first diameter, the insulating material being in both the middle portion and the surface portion, a distance between two pins being between a center point of one pin and a center point of another pin and being in a range of at least 1.2 times and at most 1.6 times of the second diameter.

Abstract: An electrical device, having a feedthrough through a housing part which has a material thickness T of the housing of the device and is made of metal. The metal being iron, iron alloys, iron-nickel alloys, iron-nickel-cobalt alloys, KOVAR, steel, high-grade steel, aluminum, aluminum alloys, AlSiC, magnesium, magnesium alloys, titanium or titanium alloys. The housing part having at least one opening, wherein the opening receives a contact element, being a conductor consisting of a conductive material in a glass or glass ceramic material. The housing part has a collar in the region of the opening and thus forms an inner wall of the feedthrough opening having a height H, which is greater than material thickness T, wherein glazing length EL of the glass or glass ceramic material preferably corresponds to height H.

Abstract: A method of producing an electronic component is provided. The method includes providing flat glass having a dielectric constant of less than 4.3 and a dielectric loss factor of 0.004 or less at 5 GHz; configuring the flat glass as one of an interposer, a substrate, or a superstrate; and forming the interposer, the substrate, or the superstrate into the electronic component. The electronic component can be an antenna, a patch antenna, an array of antennas, a phase shifter element, and a liquid crystal-based phase shifter element.

Abstract: A device for laser machining workpieces includes at least one laser and a positioning apparatus, in order to set different impingement positions of a laser beam of the laser on a workpiece. The positioning apparatus includes a rotatable holder for the workpiece with a drive, in order to set the holder in rotation, and the rotational axis of the holder is oriented in such a way that it has a component parallel to the incidence direction of the laser beam, and the device includes a control apparatus that is configured, during the rotation of the holder, to control the emission of the laser beam in a synchronized manner with the rotation of the holder and in this way to set certain impingement positions of the laser beam on the workpiece. The laser is an ultra-short pulse laser which is suitable for adding filament-shaped degradations in workpieces made from glass.

Abstract: A cover glass made of a glass ceramic that is silica based and has a main crystal phase of high quartz solid solution or keatite solid solution is provided. The cover glass has a stress profile with at least one inflection point at a depth of the cover glass of more than 10 ?m, a thickness from 0.1 mm to 2 mm, and a chemical tempering structure with a surface compressive stress of at least 250 MPa and at most 1500 MPa. A process for producing the cover glass is provided that includes producing a silica based green glass, hot shaping the silica based green glass, thermally treating the silica based green glass with a nucleation step and a ceramization step, and performing an ion exchange at an exchange bath temperature for a duration of time in an exchange bath.

Abstract: The invention relates to a hydrogen store having little weight and low hydrogen permeability. The invention also relates to a combination material comprising a barrier material and a reinforcing material. The combination material can especially be used for walls in stores for molecular hydrogen.

Abstract: A glass has a transmittance at a reference thickness of 1.0 mm of at least 65.0% at a wavelength of 260 nm. An amount of ZrO2 in the glass is less than 150 ppm.

Abstract: An enclosure is provided having a first and a second substrate, a common laser weld zone, a function zone enclosed inside the enclosure, and a fluid channel allowing for a fluid flow between the function zone and an outside area. The first substrate is transparent at least in part and/or at least for a wavelength bandwidth. The common laser weld zone permanently joins the first substrate to the second substrate and/or to provide for a hermetic sealing between the first substrate and the second substrate. The function zone includes a cavity and is inside the enclosure.

Abstract: A flow cell for optical spectroscopy is provided with a housing having a cavity which forms a measuring chamber, inlet and outlet channels and an optical window which seals an opening of the measuring chamber. The optical window is connected to the housing by melting a glass connecting element. A recess is formed around the opening and a supporting surface for the optical window is formed around the opening, so that the optical window contacts the housing at the supporting surface. The use of such a flow cell in processes monitoring of biotechnological processes and methods is also disclosed.

Abstract: A cleaning system for cleaning the inside of a glass element with a fluid includes a nozzle head including a cleaning opening for releasing a part of the fluid and pointing in a first direction and a pressure balancing opening for releasing a part of the fluid and pointing in a second direction. Two half spaces including a first one and a second one are separated by a plane which is perpendicular to a center axis of the nozzle head. A first direction vector of the first direction points in a direction at least one of towards the first half space or away from the second half space. A second direction vector of the second direction points in a direction at least one of towards the second half space or away from the first half space.

Abstract: A feedthrough includes: a main body including at least one passage opening running through the main body, the main body including titanium or a titanium alloy; an insulation material accommodated in the at least one passage opening running through the main body, the insulation material including glass, the insulation material having a contact angle of less than 90 degrees at least in a plurality of regions of the insulation material with respect to the main body; and at least one electrical conductor extending through the insulation material accommodated in the at least one passage opening.

Abstract: An aluminum-doped lithium ion conductor based on a garnet structure includes an aluminum-doped lithium lanthanum zirconate (LLZO). The LLZO is co-doped with at least one trivalent M3+ ion on the lanthanum site. The trivalent M3+ ion has an ionic radius that is smaller than that of La3+ and a higher lithium content is present in comparison to a stoichiometric garnet structure. If M3+ is yttrium, a further trivalent M3+ ion, which is different than Y3+ and has an ionic radius that is smaller than that of La3+, is co-doped on the lanthanum site. Co-doping includes doping on the lanthanum site with ions of the same valence, but smaller diameter, causing a change in lattice geometry to a cubic form. This leads to a stabilization of the cubic crystal modification that is also present with superstoichiometric quantities of lithium.

Abstract: An illumination system for a medical technology therapy and/or diagnosis system is provided. The system includes a light source, preferably a laser light source, and a light guide, which at a proximal end can be connected to the at least one light source and/or can be assigned thereto, and which system has at the distal end of the light guide a diffuser element having a longitudinal axis which extends into or in the diffuser element perpendicularly with respect to an input face of the light guide, wherein the diffuser element emits light laterally with respect to the longitudinal axis over its active length in the operating state, wherein the diffuser element has at least one diffuser base body and the diffuser base body contains a matrix that has at least one scattering element and is enclosed at least on its cladding surface by a solid encapsulation.

Abstract: A waveguide is provided for transmitting electromagnetic waves, in particular for transmitting image information, from a proximal end to a distal end, along a transport direction running between the ends and a via a cross-section running transversely to the transport direction. The waveguide has a plurality of structural elements, wherein at least two different types of structural elements have a first type with a first refractive index and a second type with a second refractive index. Each of the structural dements extends along the transport direction and over a part of the cross-section of the waveguide such that a plurality of cross-sectional regions are defined in the cross-section of the waveguide, each cross-sectional region corresponding to the cross-section of an individual structural element.

Abstract: A method of making a glass product includes the steps of: melting a batch of a plurality of glass raw materials in a melting tank to form a glass melt; heating at least one of the plurality of glass raw materials and the glass melt using at least one fuel burner by reacting hydrogen and oxygen; withdrawing the glass melt from the melting tank; obtaining a glass product, the glass product having an Fe2+ to Fe3+ ratio of less than 0.2 or less than 0.05 and having at least one of less than 80 bubbles in a size range of from 0.1 mm to 0.2 mm per 10 kg of glass and less than 2 bubbles of a size larger than 0.2 mm per 10 kg of a glass.