Abstract: An electrode for a high-pressure discharge lamp may include a shaft and a head mounted thereon, wherein at least a section of the head includes ceramic material, wherein the ceramic material is a boride or carbide.

Abstract: An X-ray tube includes a vacuum-filled housing and an anode contained in the vacuum-filled housing. The anode is operable to produce an X-ray beam based on electrons emitted from a cathode and attracted by a high voltage applied to the anode. The X-ray tube also includes a high-voltage power line introduced from an external side of the housing for supplying the anode with a high-voltage potential. The X-ray tube includes an electrical feed for electrically insulating the high-voltage power line from the housing. The electrical feed in the X-ray tube includes at least two insulating layers radially between the high-voltage power line and the housing. The at least two insulating layers are separated from one another by a metallic coating.

Abstract: A rotary anode for an X-ray tube includes a ceramic base body that carries a focal path for emitting X-rays during electron irradiation. The ceramic base body is made of a mixture of silicon carbide and at least one high temperature-resistant diboride.

Abstract: An electrode for a high-pressure discharge lamp may include a shaft and a head mounted thereon, wherein at least a section of the head includes ceramic material, wherein the ceramic material is a boride or carbide.

Abstract: In a lamp driving circuit for operating a high intensity discharge lamp, an a commutation circuit comprises at least two switching devices. The switching devices are alternately switched active at a commutation frequency. The active switching device switches at a switching frequency. During an ignition mode, the switching frequency and the commutation frequency are substantially equal. A resulting commutation voltage is supplied to an inverter resonant circuit for generating a supply current. At a node of the inverter resonant circuit, a clamping circuit limits the generated voltage to a predetermined maximum voltage. The voltage at said node of the inverter resonant circuit is applied to an output resonant circuit. The output resonant circuit operates in the ignition mode as a resonator for generating a high ignition voltage; in a steady state operation mode, the output resonant circuit operates as a low-pass filter for reducing a high frequency current component in a lamp current.

Abstract: A high-pressure discharge lamp may include a ceramic discharge vessel and a longitudinal axis, with electrodes respectively being led out from the discharge vessel by means of a feed-through via capillaries, wherein a tubular cermet part, which consists of individual layers of different composition layered axially in succession, is fitted on the capillary, each layer containing Mo and Al2O3, the proportion of Mo in the first layer facing toward the capillary being from 3 to 15 vol. % and in the last layer being from 85 to 97 vol. %, and a molybdenum cover cap, the cover cap being welded to the feed-through and the cover cap being connected to the cermet part by means of solder containing metal, and the connection between the capillary and the cermet part being established by means of high-melting glass solder or sinter-active Al2O3 powder.

Abstract: A halogen incandescent lamp may include a bulb, in which a light-emitting element and a fill with a halogen-containing additive is accommodated, the halogen containing F, wherein a fluorine-resistant layer which is passive at suitable temperatures is accommodated in the interior of the bulb and completely covers the inner wall.

Abstract: An arc tube of ceramic material has an aluminum nitride (AlN) end structure (36) wherein a feedthrough (30) is sealed by direct bonding. Said feedthrough is comprised of a refractory metal, W or Mo, that is aluminized on its outer surface. Preferably, the feedthrough is a Mo pipe that had been provided with a Mo3191Al layer (36) prior to direct bonding, the aluminized layer provides a bonding interface between the AlN ceramic and the refractory metal feedthrough.

Abstract: The invention relates to a metal halide lamp comprising a ceramic discharge vessel (10), characterized in that an MoV leadthrough is connected to a PCA element (Al2O3) by means of a specific adhesive layer containing Al and Mo.

Abstract: A radiation detector is disclosed for X- or gamma rays. In at least one embodiment, the radiation detector includes an array of scintillation detectors and a reflector layer separating these from one another. The reflector layer includes a binder matrix and particles of a light-reflecting material embedded therein, the surfaces of the particles being coated at least partially with a dispersant.

Abstract: A high-pressure discharge lamp may include a ceramic discharge vessel and a longitudinal axis, with electrodes respectively being led out from the discharge vessel by means of a feed-through via capillaries, wherein a tubular cermet part, which consists of individual layers of different composition layered axially in succession, is fitted on the capillary, each layer containing Mo and Al2O3, the proportion of Mo in the first layer facing toward the capillary being from 3 to 15 vol. % and in the last layer being from 85 to 97 vol. %, and a molybdenum cover cap, the cover cap being welded to the feed-through and the cover cap being connected to the cermet part by means of solder containing metal, and the connection between the capillary and the cermet part being established by means of high-melting glass solder or sinter-active Al2O3 powder.

Abstract: The invention relates to a metal halide lamp comprising a ceramic discharge vessel (21), characterized in that a molybdenum leadthrough (11) is connected to a cermet stopper (15) via an intermetal interface gradient (20).

Abstract: In an application of a gas discharge lamp (La) arranged at a relatively large distance from its driving lamp driver circuit, parasitic capacitances (CGR,1, CGR,2) between the wiring (W1, W2) and ground may result in a current flowing to other parts of the lamp driver circuit, which may result in incorrect operation of the lamp driver circuit. In particular, if the gas discharge lamp is ignited using a resonant circuit for generating a relatively high ignition voltage such incorrect operation may result. In accordance with the present invention, a first alternating voltage is generated at a first lamp terminal (O1) and a second alternating voltage is generated at a second lamp terminal (O2), such that the voltage across the lamp terminals is equal to the sum of the first and the second alternating voltages. Thereto, a resonant inductance of the resonant circuit is embodied as a first and a second inductor (L1a, L1b), each coupled to a respective lamp terminal of the gas discharge lamp.

Abstract: The invention relates to a metal halide lamp comprising a ceramic discharge vessel (10), characterized in that an MoV leadthrough is connected to a PCA element (Al2O3) by means of a specific adhesive layer containing Al and Mo.

Abstract: In a lamp driving circuit for operating a high intensity discharge lamp, an a commutation circuit comprises at least two switching devices. The switching devices are alternately switched active at a commutation frequency. The active switching device switches at a switching frequency. During an ignition mode, the switching frequency and the commutation frequency are substantially equal. A resulting commutation voltage is supplied to an inverter resonant circuit for generating a supply current. At a node of the inverter resonant circuit, a clamping circuit limits the generated voltage to a predetermined maximum voltage. The voltage at said node of the inverter resonant circuit is applied to an output resonant circuit. The output resonant circuit operates in the ignition mode as a resonator for generating a high ignition voltage; in a steady state operation mode, the output resonant circuit operates as a low-pass filter for reducing a high frequency current component in a lamp current.

Abstract: The invention relates to a metal halide lamp comprising a ceramic discharge vessel (21), characterized in that a molybdenum leadthrough (11) is connected to a cermet stopper (15) via an intermetal interface gradient (20).

Abstract: A radiation detector is disclosed for x- or gamma rays. In at least one embodiment, the radiation detector includes an array of scintillation detectors and a reflector layer separating these from one another. The reflector layer includes a binder matrix and particles of a light-reflecting material embedded therein, the surfaces of the particles being coated at least partially with a dispersant.

Abstract: A scintillator layer is disclosed for a spatially resolving X-ray detector. Apertures provided in a plate and in the form of a grid, are filled with a filling compound formed from a polymer and a phosphor powder.

Abstract: A method of manufacturing a ceramic discharge vessel for a lamp application is described. The method uses a low viscosity suspension of ceramic powder in a liquid resin. The discharge vessel is formed layer by layer using a stereolithography system. Preferably, the layers are formed by locally exposing the ceramic-resin mixture to a UV light source that solidifies and cures the resin only in the areas which correspond to the particular cross-sectional profile of the discharge vessel for a respective layer.

Abstract: A method and a device for igniting two series-connected HID lamps (1A, 1B) are described, the two HID lamps being connected in series to a single ignitor (10). The ignitor generates a high voltage ignition pulse, which is sequentially applied to the two lamps sequentially, due to a capacitive unbalance between the two lamps. In order to ensure such capacitive unbalance, a capacitor (13) may be arranged in parallel with one of the lamps (1B).