Abstract: A method for producing a vehicle wheel from a light metal material is disclosed herein. The light metal material is introduced in liquid form into a mold cavity of a casting mold and pressurized casting is then used to produce the vehicle wheel. The casting mold is temperature-controlled, where different regions of the casting mold are maintained at different temperatures. An apparatus that includes the disclosed casting mold is also described herein.

Abstract: A door for a domestic refrigeration appliance has a door inner panel and a door outer panel. The inner and outer panels are arranged on a single-piece, multiple-sided door frame. The door frame is open in the peripheral direction of the frame shape, and a separate recessed handle element is arranged in an open peripheral section of the door frame. There is also described a domestic refrigeration appliance with a door.

Abstract: The invention relates to a method for producing a vehicle wheel from a light-metal material, in which the light-metal material is introduced in liquid form into a mold cavity of a casting mold. The vehicle wheel is produced by means of pressurized casting, wherein the casting mold is temperature-controlled in different regions to different temperatures.

Abstract: A door for a domestic refrigeration appliance has a door inner panel and a door outer panel. The inner and outer panels are arranged on a single-piece, multiple-sided door frame. The door frame is open in the peripheral direction of the frame shape, and a separate recessed handle element is arranged in an open peripheral section of the door frame. There is also described a domestic refrigeration appliance with a door.

Abstract: The invention relates to an optical waveguide (optical fiber) based on quartz glass having reduced internal mechanical stresses. In prior art optical waveguides, the internal mechanical stresses are primarily due to the production process, namely due to the difference of the linear thermal coefficients of expansion of the core and sheathing material during the cooling of the fiber and due to the drawing itself. In an inventive optical waveguide, the difference of the linear thermal coefficients of expansion of the core and/or sheathing material is selected by means of an appropriate doping of the core and sheathing material. This selection is made so that the internal mechanical stresses, which are caused by the cooling during the production process, are significantly reduced or eliminated and/or they counteract the stresses caused by the drawing.

Abstract: The invention relates to an optical waveguide (optical fiber) based on quartz glass having reduced internal mechanical stresses. In prior art optical waveguides, the internal mechanical stresses are primarily due to the production process, namely due to the difference of the linear thermal coefficients of expansion of the core and sheathing material during the cooling of the fiber and due to the drawing itself. In an inventive optical waveguide, the difference of the linear thermal coefficients of expansion of the core and/or sheathing material is selected by means of an appropriate doping of the core and sheathing material. This selection is made so that the internal mechanical stresses, which are caused by the cooling during the production process, are significantly reduced or eliminated and/or they counteract the stresses caused by the drawing.

Abstract: Optical waveguides made of quartz glass with reduced infrared absorption and reduced attenuation coefficients are made of glass material composed of atoms having mass numbers higher than that of the natural isotope distribution. The quartz glass or doped quartz glass is made of silicon atoms, of which most or all have the mass numbers 29 and/or 30, as well as of oxygen atoms, of which most or all are composed of isotopes with the mass numbers 17 and/or 18. Atoms of the 76Ge isotope are preferably used for doping with germanium atoms having higher mass numbers than in the natural isotope mixture. Glass with atoms of preferably 30Si and/or 18O are preferably used for optical waveguides based on quartz glass having attenuation coefficients below 0.15 dB/km. As indicated, such optical waveguides are also suitable for transmitting high-energy, pulsed or continuous laser light in a wavelength range from 2.0 to 3.0 &mgr;m. These optical waveguides are also suitable for transmitting holmium laser light at 2.

Abstract: The invention relates to a thin-layer chromatography apparatus (1) having a plurality of optical light guides to inject light from a light source (2) onto a thin-layer plate (4) and to feed light from the thin-layer plate to an optical examining device (6). To obtain a robust, compact thin-layer chromatography apparatus having a high spectral and spatial resolution, with which there are only minimal disturbances, if any, caused by ambient light and which is nonetheless economical to produce, the invention provides for the emitted-light guides (3) and or received-light guides (5) to be positioned in a regular geometrical pattern in relation to each other either towards or away from the plate, as represented by the rows (11 and 14). The light spots emitted by the emitted-light guides and the field of vision of the received-light guide overlap in an adjustable manner (linear movements 12b, pivoting movements 12a), as regards spatial resolution and light yield.

Abstract: A method for the flexible rolling of a metallic band wherein, during the rolling procedure, the metallic strip is lead through a roll gap which is formed between two working rolls and which is set so that, over the length of the metallic strip, strip sections are obtained with different strip thickness. In order to prevent temperature-related deviations in the thickness and length profiles of the metallic strip, a compensation of the temperature influence effecting the metallic strip is carried out during rolling in order to prevent deviations from the theoretical thickness and/or the theoretical length of the individual strip sections at a default temperature of the metallic strip.

Abstract: A method of producing an optical component for the transmission of UV light is provided. An optical fiber is prepared from synthetic quartz glass or from doped synthetic quartz glass with a transmission region for the transmission of UV light, and the transmission region is charged with hydrogen and/or with deuterium. The charging includes coating the fiber with a blocking layer inhibiting hydrogen diffusion, and charging the fiber in an atmosphere containing hydrogen and/or deuterium. This atmosphere is under a pressure in the range from 0.1 MPa to 200 MPa and at a temperature between 100° C. and 800° C. so as to produce a concentration of said hydrogen and/or deuterium of at least 5×1019 molecules/cm3 in the transmission region. The coating and charging steps may be performed repeatedly, and the blocking layer is built up to comprise a plurality of thinner layers including a top layer, after application of which charging is discontinued.

Abstract: A multimode optical fiber for UV light transmission, able to be sterilized with gamma radiation, has a core including undoped synthetic silica, a cladding including fluorine doped synthetic silica, a hydrogen content higher than 5.times.10.sup.19 molecules/cm.sup.3 and a metal coating that retards diffusion of hydrogen outwardly from the fiber, the metal being selected from aluminum, copper, zinc, tin, silver and gold. The metal coating has a high diffusion coefficient below 150.degree. and a low diffusion coefficient at a hydrogen loading temperature above 250.degree. C. The optical fiber may have a high-OH content of 50 to 1500 ppm and a low-OH content below 50 ppm after treatment. The optical fiber may also or alternatively have a low-OH content below 50 ppm, and preferably below 5 ppm, before treatment. A gamma radiation sterilized multimode fiber bundle may include a plurality of such optical fibers. A gamma radiation sterilized catheter may include at least one optical fiber or a fiber bundle.

Abstract: A method for monitoring mechanical power transmission systems is disclosed, wherein the power transmission system includes at least one power transmitting element, and which is characterized for a reliable and simple measurement of elongations on the power transmitting element by the following steps: First two substantially parallel planes are established on the unstressed power transmitting element, each plane being defined by at least three space coordinates or respectively measuring points on the power transmitting element. Then, the relative change in position of the two planes to one another is determined on the stressed power transmitting element. Finally, the determined relative change in position of the planes is correlated with the local elongation or compression on the power transmitting element. An apparatus for carrying out the method is likewise described.

Abstract: Disclosed is a method for the axial building up, in a vertical arrangement, of a hollow cylindrical soot body having no internal support and consisting substantially of silicon dioxide by means of at least one flame hydrolysis build-up burner serving for the soot production. In this method the soot is deposited at the beginning of the build-up onto an auxiliary body, and during the build-up the build-up burner and the growing soot body are rotated relative to one another, and the burner is at the same time held at an unvarying distance from the growing end of the hollow cylinder and centrally above the predetermined cross section of the upwardly growing end of the cylinder wall. The penetration of soot into the interior of the cylinder is prevented by means of a directed gas stream.

Abstract: Method for obtaining cross cylinder-like actions for using the adjusting or aligning measurement known as the cross cylinder method in phoropters for subjective refraction, wherein the spherical and cylindrical lens discs of the phoropter are adjusted in preprogrammed manner to cross cylinder-like lens systems.The set problem is also solved by a phoropter with spherical test lenses and cylindrical lenses arranged on lens discs and which can be introduced into the observation optical path, wherein the motor drives of the lens discs are combined in a program control unit, connected to an operating unit and an indicating unit.

Abstract: The invention relates to a surgery microscope with a front lens having at least one displaceable element through which the light beams can be passed in addition to the observation beams. The displaceable front lens element is constructed in cut-through form between the path of the illumination rays and the reflections on the lens surfaces on the one hand and the path of the observation rays on the other and has the cut point or notch of a light barrier. As a result, reflections which would otherwise occur on the individual lens component surfaces are kept away from the paths of the observation rays.

Abstract: A floor or ceiling support mounted microscope for microsurgery wherein the microscope includes an objective of variable intercept length. The objective consists of at least two lens assemblies movable relative to each other. One of the two lens assemblies may be exchangeable against similar assemblies of different focal lengths.

Abstract: A floor or ceiling mounted microscope for microsurgery with various accessories wherein the microscope is rotatably journalled in a suspension mounting in a manner so that the pivot axis of the microscope coincides with the axis of the beam splitter. The accessories may either be rigidly secured to the suspension mounting, or be rotatable together with the microscope.

Abstract: A microsurgical operating unit for the movable installation of an operating microscope in an operating theater. The unit includes a ceiling member for attachment to the ceiling, several pivotably interconnected members for holding and locking the microscope in any desired orientation, and a motor drive for elevation adjustments of the microscope.