Abstract: A sheet-like element made of brittle material includes two opposing side faces and a peripheral edge face which determines an outer contour of the sheet-like element. The edge face has at least one first region and at least one second region. The at least one first region differs from the at least one second region in terms of its surface structure. The at least one first region has an etched surface and the at least one second region constitutes a fractured surface. A surface area of the at least one first region is larger than a surface area of the at least one second region. The at least one first region and the at least one second region are arranged next to one another in a direction along the edge face.

Abstract: A component of glass or glass ceramic having predamages arranged along at least one predetermined dividing line is provided. The dividing line has a row of predamages lying one behind the other. The predamages pass continuously through the glass or the glass ceramic with at least 90% of the predamages being cylindrically symmetrical. The glass or the glass ceramic has a material compaction of at least 1% relative to an actual material density in a radius of 3 ?m about a longitudinal axis of respective pre-damaged points. The relative weight loss per pre-damaged point is less than 10% and the component has a thickness of at least 3.5 mm.

Abstract: A method includes producing filamentary damages in a volume of a glass or glass ceramic element that are adjacently aligned along a separation line and that extend obliquely relative to a surface of the glass or glass ceramic element, and separating a portion from the glass or glass ceramic element along the separation line. The step of producing the filamentary damages includes directing laser pulses of an ultrashort pulse laser obliquely on the surface so that the laser pulses have a light propagation direction that extends obliquely relative to the surface and so that the filamentary damages resulting from the laser pulses have the longitudinal extension that extends obliquely relative to the surface, generating a plasma within the volume with the laser pulses, and displacing the laser pulses at points of incidence over the surface along the separation line.

Abstract: A method for processing glass is provided. The method includes the steps of providing a glass element and removing glass material from the glass element by etching with an alkaline etching medium in an organic solvent.

Abstract: A method and apparatus for producing glass products from tubular glass precursors is provided. In particular, a method and apparatus for separating tube glass into sized glass tube portions, produced glass tube portions, glass precursor portions, or glass product portions, and their use as pharmaceutical packaging are provided. The tube glass or the glass precursor or the glass product is provided with filaments along predetermined breaking planes. The filaments extend obliquely to the local wall radius and allow for clean separation of the tube glass or the glass precursor or the glass product.

Abstract: A method for controlling an energy distribution introduced by at least one line focus of at least one laser beam in a substrate is performed by forming the line focus at least regionally in the substrate and influencing the laser beam with at least one phase mask to control the energy distribution in the substrate.

Abstract: A method for processing glass is provide. The method includes the steps of providing a glass element and removing glass material from the glass element by etching with an alkaline etching medium in an organic solvent.

Abstract: A method is provided that includes producing filamentary damages in a volume of a glass or glass ceramic element adjacently aligned along a separation line and extend obliquely relative to a surface of the glass or glass ceramic element; and separating a portion from the glass or glass ceramic element along the separation line. The step of producing the filamentary damages includes directing laser pulses of an ultrashort pulse laser obliquely on the surface so that the laser pulses have a light propagation direction that extends obliquely relative to the surface and so that the filamentary damages resulting from the laser pulses have the longitudinal extension that extends obliquely relative to the surface; generating a plasma within the volume with the laser pulses; and displacing the laser pulses at points of incidence over the surface along the separation line.

Abstract: A method for producing structured glass articles is provided by removing glass material from a glass element. The method includes the step of etching the glass element to remove the glass material from using an etching medium. The etching medium has a basic aqueous etching solution with a pH of more than 12 and a complexing agent. The complexing agent complexes a leached constituent of the glass element.

Abstract: A platelike glass element is provided that includes a first surface, a second surface opposite the first, and a hole that perforates the first surface. The first surface has, at least partially around the hole, has a feature selected from a group consisting of: a height deviation with respect to the first surface that is greater than 0.005 ?m, is greater than 0.05 ?m, less than 0.1 ?m, less than 0.3 ?m, a less than 0.5 ?m, and combinations thereof. The first surface has an average roughness value that is less than 15 nm. The edge between the first surface and the hole that is free of elevations.

Abstract: A platelike glass element is provided that includes a first surface, a second surface opposite the first, and a hole that perforates the first surface. The hole extends in a longitudinal direction and a transverse direction, where the longitudinal direction is transverse to the first surface. The first surface has, at least partially around the hole, an elevation. The elevation has a feature selected from a group consisting of: a height of less than 5 ?m that at least partially around the hole, a height greater than 0.05 ?m, a height greater than 0.5 ?m, a height greater than 1 ?m, a height greater than 10 ?m, a height less than 20 ?m, a height less than 15 ?m, a height less than 12 ?m, and combinations thereof. The first surface has an average roughness value that is greater than 15 nm and less than 100 nm.

Abstract: A panel-shaped glass element is provided that includes vitreous material having a thermal expansion coefficient of less than 10×10-6 K-1 as well as two opposing surfaces. The glass element furthermore has at least one recess which runs through the glass of the glass element and has a recess wall which runs around the recess and adjoins the two opposing surfaces. The recess wall has a structure with a multiplicity of mutually adjacent rounded dome-shaped depressions. A roughness of the recess wall is formed by these depressions as well as the ridges enclosing the depressions. The recess wall has a mean roughness value (Ra) which is less than 5 µm.

Abstract: The present disclosure provides a device and a method for laser-based separation of a transparent, brittle workpiece, comprising a laser that emits a laser beam having an intensity (IL) along an optical axis (P), and an optical device. The optical device has at least one one-piece double axicon. The double axicon has an entrance surface and the optical device has an exit surface. The entrance surface is such that in the double axicon, a ring beam is formed. The intensity (IL) in the double axicon is lower than the threshold intensity (IS) of the material of the double axicon. The exit surface is such that a line focus having a maximum intensity (Imax) and a length (LT) is generated in the direction of the laser beam behind the exit.

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 component of glass or glass ceramic having predamages arranged along at least one predetermined dividing line is provided. The dividing line has a row of predamages lying one behind the other. The predamages pass continuously through the glass or the glass ceramic with at least 90% of the predamages being cylindrically symmetrical. The glass or the glass ceramic has a material compaction of at least 1% relative to an actual material density in a radius of 3 ?m about a longitudinal axis of respective pre-damaged points. The relative weight loss per pre-damaged point is less than 10% and the component has a thickness of at least 3.5 mm.

Abstract: A method for separating a portion from a sheet glass element having a thickness of at least 2 millimeters along an intended separation line that divides the sheet glass element into the portion and a remaining main part is provided. The method includes producing filamentary damages comprising sub-micrometer hollow channels in a volume of the glass sheet element adjacently aligned along the separation line; and heating and/or cooling the glass sheet element to cause expansion and/or contraction so that the portion detaches from the main part along the separation line. The portion and the remaining main part each remain intact as a whole. The step of producing the filamentary damages includes generating a plasma within the volume with laser pulses of an ultrashort pulse laser; and displacing points of incidence of the laser pulses over a surface of the glass sheet element along the separation line.

Abstract: A spacer wafer for producing spacers of electro-optical converter housings is provided. The spacer wafer is a transparent glass plate having a multiplicity of openings separated from one another and distributed in a grid so that singulated spacers are obtainable by severing sections of the glass plate along separating lines between the openings. The openings have side walls with microstructuring that has a roughness with an average roughness value Ra of less than 0.5 ?m with a measurement distance of 500 ?m.

Abstract: A method for separating a substrate of a brittle-hard material is provided. The method includes the steps of introducing defects into the substrate at a spacing from one another along a separation line using at least one pulsed laser beam; selecting an average spacing between neighboring defects and a number of laser pulses for generating a respective defect such that a breaking stress (?B) for separating the substrate along the separation line is smaller than a first reference stress (?R1) of the substrate and such that an edge strength ?K of the separation edge obtained after separation is greater than a second reference stress (?R2) of the substrate; and separating the substrate after introducing the defects by applying a stress along the separation line.

Abstract: A component of glass or glass ceramic having predamages arranged along at least one predetermined dividing line is provided. The dividing line has a row of predamages lying one behind the other. The predamages pass continuously through the glass or the glass ceramic with at least 90% of the predamages being cylindrically symmetrical. The glass or the glass ceramic has a material compaction of at least 1% relative to an actual material density in a radius of 3 ?m about a longitudinal axis of respective pre-damaged points. The relative weight loss per pre-damaged point is less than 10% and the component has a thickness of at least 3.5 mm.

Abstract: A method for separating a portion from a sheet glass element having a thickness of at least 2 millimeters along an intended separation line that divides the sheet glass element into the portion and a remaining main part is provided. The method includes producing filamentary damages comprising sub-micrometer hollow channels in a volume of the glass sheet element adjacently aligned along the separation line; and heating and/or cooling the glass sheet element to cause expansion and/or contraction so that the portion detaches from the main part along the separation line. The portion and the remaining main part each remain intact as a whole. The step of producing the filamentary damages includes generating a plasma within the volume with laser pulses of an ultrashort pulse laser; and displacing points of incidence of the laser pulses over a surface of the glass sheet element along the separation line.