Abstract: A glass ceramic is provided that has an upper surface, a lower surface, and a surface zone of at least 10 nm thickness that is substantially amorphous so that a content of crystalline phases in the surface zone is at most 20 vol %. The glass ceramic has at least one lateral pattern with periodic and/or quasi-periodic features with a mean feature spacing of not more than 200 ?m. The features are defined by depressions in the material of the surface zone so that the pattern as a whole does not protrude beyond the surface level. The features have a depth that is smaller than a thickness of the surface zone and do not extend into the region of the glass ceramic that has a higher content of crystalline phases.

Abstract: The method for making a lens with a first convex lens surface (32) and a second lens surface (33) includes feeding a glass melt drop into a concave mold (2, 10), precise pressing both sides of the glass melt drop in the concave mold (2, 10) together with a press die (20) and immersing the press die (20) in the glass melt drop so that a supporting rim (34) with predetermined dimensions, which protrudes beyond a highest point of the second lens surface (33), is formed on the lens by glass material displaced by the precise pressing. The apparatus for precise pressing includes an upper mold part (10) a lower mold part (2) and the press die (20).

Abstract: A method for making glass ceramic composite structures, wherein a first and at least a second glass component, with an intermediate layer of a joining solder consisting of glass placed between them, are assembled to form a raw composite structure, wherein the joining solder has a radiation absorption capacity higher than the components to be joined, and wherein the raw composite structure is irradiated with energy, for example IR energy, at least in the area of the joining solder until the joining solder has softened sufficiently to bond together the components and the joining solder to produce a composite glassy structure. Thereafter a ceramization treatment is performed.

Abstract: A method for making glass ceramic composite structures, wherein a first and at least a second glass component, with an intermediate layer of a joining solder consisting of glass placed between them, are assembled to form a raw composite structure, wherein the joining solder has a radiation absorption capacity higher than the components to be joined, and wherein the raw composite structure is irradiated with energy, for example IR energy, at least in the area of the joining solder until the joining solder has softened sufficiently to bond together the components and the joining solder to produce a composite glassy structure. Thereafter a ceramization treatment is performed.

Abstract: A lens is disclosed for lighting purposes suited in particular as a lens for a poly-ellipsoid reflector headlamp for imaging the light emitted by a light source and reflected by a poly-ellipsoid reflector for the purpose of producing a predetermined lighting pattern. At least one of the two lens surfaces comprises areas having different optical scattering effects which areas are configured as zones that are transferred from a mold to the surface by a hot-pressing process.

Abstract: The invention relates to a method and an apparatus for positioning a feeder needle, and to a production line for optical components, in which a feeder needle of an apparatus for portioning fluid material, preferably softened glass, in particular of a needle feeder, has its position relative to a seat for the feeder needle recorded by means of a force-measuring device, and to further apparatuses which realize this method and to objects produced by the process.

Abstract: The device for blank pressing glass bodies includes a first rotary indexing table with preforms for forming parisons from glass gobs; a second rotary indexing table having pressing molds and pressing tools for pressing the parisons into final form after formation in the preforms; and a device for shifting the first rotary indexing table relative to the second rotary indexing table so that each preform is positionable in a transfer position between a pressing tool and a pressing mold. Each preform is mounted on the first rotary indexing table by a indexable mount for holding it in a first horizontal position or in a second position pivoted away from the first position, so that, when a preform is in the transfer position, the indexable mount can be pivoted, so that a parison in it drops into the pressing mold for pressing by the pressing tool.

Abstract: The plano-convex lens of a projection headlight has a holding edge (4) integrally formed on an outer lens edge and a supporting edge (5) projecting from its plane surface (3) and formed integrally with the holding edge (4). The supporting edge (5) and the holding edge (4) form a continuous cylindrical outer circumferential surface (45) extending over their outer sides. The convex surface (2) and the plane surface (3) of the lens are bright pressed surfaces so that the grinding and polishing steps usually used in making the lens can be eliminated. The method of manufacturing the lens including bright pressing the convex and plane surfaces is also part of the invention.

Abstract: In order to provide glass ceramic articles with an improved surface with regard to roughness, the invention relates to a method for producing glass ceramic panels (40) in which a green glass panel (10) is produced by hot forming and the green glass panel (10) is subsequently ceramized to form a glass ceramic, wherein the green glass panel (10) is fire-polished on at least one surface (11, 12) before or during the ceramizing.

Abstract: The optical lens, especially for a motor vehicle, is provided with a soft-focus effect, e.g. to soften a light-dark boundary on an illuminated surface. For this purpose the optical lens has an optically active surface (5?) provided with an embossed fine structure (2) extending radially outward in a direction from an optical axis (O) toward an outer periphery (P) in an undulating form and an embossed microstructure (3) superimposed on the embossed fine structure (2). The fine structure (2) has a roughness that is greater than that of the microstructure (3). The fine structure (2) preferably has a roughness of from 1 ?m to 10 ?m and the microstructure (3) has a roughness (h) in a range of from 0.1 ?m to 2.5 ?m.

Abstract: The method for making a lens with a first convex lens surface (32) and a second lens surface (33) includes feeding a glass melt drop into a concave mold (2, 10), precise pressing both sides of the glass melt drop in the concave mold (2, 10) together with a press die (20) and immersing the press die (20) in the glass melt drop so that a supporting rim (34) with predetermined dimensions, which protrudes beyond a highest point of the second lens surface (33), is formed on the lens by glass material displaced by the precise pressing. The apparatus for precise pressing includes an upper mold part (10) a lower mold part (2) and the press die (20).

Abstract: The invention relates to a method and an apparatus for positioning a feeder needle, and to a production line for optical components, in which a feeder needle of an apparatus for portioning fluid material, preferably softened glass, in particular of a needle feeder, has its position relative to a seat for the feeder needle recorded by means of a force-measuring device, and to further apparatuses which realize this method and to objects produced by the process.

Abstract: A lens is disclosed for lighting purposes suited in particular as a lens for a poly-ellipsoid reflector headlamp for imaging the light emitted by a light source and reflected by a poly-ellipsoid reflector for the purpose of producing a predetermined lighting pattern. At least one of the two lens surfaces comprises areas having different optical scattering effects which areas are configured as zones that are transferred from a mold to the surface by a hot-pressing process.

Abstract: The device for blank pressing glass bodies includes a first rotary indexing table with preforms for forming parisons from glass gobs; a second rotary indexing table having pressing molds and pressing tools for pressing the parisons into final form after formation in the preforms; and a device for shifting the first rotary indexing table relative to the second rotary indexing table so that each preform is positionable in a transfer position between a pressing tool and a pressing mold. Each preform is mounted on the first rotary indexing table by a indexable mount for holding it in a first horizontal position or in a second position pivoted away from the first position, so that, when a preform is in the transfer position, the indexable mount can be pivoted, so that a parison in it drops into the pressing mold for pressing by the pressing tool.

Abstract: The optical lens, especially for a motor vehicle, is provided with a soft-focus effect, e.g. to soften a light-dark boundary on an illuminated surface. For this purpose the optical lens has an optically active surface (5?) provided with an embossed fine structure (2) extending radially outward in a direction from an optical axis (O) toward an outer periphery (P) in an undulating form and an embossed microstructure (3) is provided on the embossed fine structure (2). The fine structure (2) preferably has a roughness of from 1 ?m to 10 ?m and the microstructure (3) has a roughness (h) in a range of from 0.1 ?m to 2.5 ?m.

Abstract: A lens (1) is described, which has a curved surface, a plane surface (3) and a holding edge (4) molded onto the lens edge. The curved surface and plane surface on both sides of the lens are pressed bright. A supporting edge (5) which projects from the plane surface (3) is molded onto the holding edge. Such lenses are preferably used for projection headlights for motor vehicles. A method of manufacture for such lenses is also specified.

Abstract: A method for producing thin glass articles from low-viscosity glass, in particular of glass with viscositiesn<10 dPas is presented, in which a thin-bodied glass composition is fed into a lower tool (1), and the glass composition is compressed by driving an upper tool (4), positioned opposite the lower tool (1), and the lower tool (1) together. The invention also relates to the use of the method. A method for producing thin glass articles is to be furnished, in which the problem of rapid cooling that occurs in the prior art is eliminated, so as to enhance the quality of the finished glass and to create the possibility of producing thin glass articles by means of pressing.