Abstract:
In a halogen-metal vapor lamp having a ceramic housing (2) and a current lead-through conductor (3) arranged in the ceramic housing, the glazed part of the current lead-through conductor (3) is a niobium alloy doped with phosphorus, in particular with 50 ppm to 0.5 wt. % phosphorus. The glazed part of the current lead-through conductor (3) preferably has inside the ceramic vessel (2) a shielding (4) from halides, which is connected to a tungsten electrode. The glazed part of a current lead-through conductor (3) in the form of a pin having a length of 5 to 30 mm and a diameter of 0.2 to 2 mm is a niobium alloy doped with phosphorus. For the glazing of current lead-through conductors in a ceramic burner, a current lead-through conductor made of a niobium alloy temperature-stabilized with phosphorus is glazed. For the production of halogen-metal vapor lamps having a ceramic housing (2) and a current lead-through conductor (3) arranged in the ceramic housing (2), the current lead-through conductor (3) is exposed to heat treatments at temperatures of at least 1000° C. and there does not soften so much that it bends.
Abstract:
The invention relates to a tubular lamp comprising a lamp vessel (10) which accommodates a light source (11a, 11b, 11c). A first part of the lamp vessel is provided with a coating (13) reflective of radiation emitted by said light source. A second part of the lamp vessel is provided with a light-absorbing coating (14). The light absorbing coating comprises pigments incorporated in a sol gel matrix.
Abstract:
A light source with a heatable filament (1) or an electrode, with the filament or the electrode being arranged in a bulb (2) or in a tube, is provided with an improved service life by the provision of a depot (3) with at least one chemical element that is also present in the filament or the electrode, and which is associated with the filament or the electrode such that the element is supplied to the filament or the electrode. Furthermore, a method is described for regenerating a light source with a heatable filament (1) or an electrode, with the filament or the electrode being arranged in a bulb (2) or in a tube. By the method, the depot (3) is associated in a first step to the filament or the electrode, with the depot comprising at least one chemical element that is also present in the filament or the electrode. Finally, the element is supplied to the filament or the electrode.
Abstract:
The mount is equipped with a lamp stand from which a first and second power supply line protrude such that they are parallel to one another, a first, short bracket being fixed to the first power supply line, and a second, long bracket, referred to below as a fixing bracket, being fixed to the second power supply line. The two brackets are arranged on a common plane, the two brackets being bent outwards away from the associated power supply line, and the two brackets being fixed to the associated power supply line of the stand such that they are offset with respect to one another.
Abstract:
Aspects of the invention can relate to a light source that includes a light source lamp and an arc-tube drive unit. The light source lamp can include an arc tube that emits light between a pair of electrodes, a reflector that reflects the light from the arc tube to a region to be illuminated, and an auxiliary mirror that reflects the light emitted from the arc tube to the region to be illuminated toward the reflector. The arc-tube drive unit can drive the arc tube with an alternating current so that, of the pair of electrodes of the arc tube, the brightness of a first luminescent point generated in the vicinity of a first electrode adjacent to the auxiliary mirror is lower than the brightness of a second luminescent point generated in the vicinity of a second electrode remote from the auxiliary mirror.
Abstract:
A lamp having a measurable ultra violet light emission and having thereon a first marking revealing at least the operating characteristics of said lamp and a second marking evidencing a change in characteristics in response to exposure to ultra violet emissions. In a preferred embodiment of the invention a symbol or other indicia is provided on the lamp as the second marking that fades in accordance with the number of hours the lamp is operating, thus providing an indication of the UV output of the lamp.
Abstract:
An elongated dielectric barrier discharge lamp with outer and inner electrodes has a tube that is arranged on the lamp stand end of the discharge vessel and that surrounds the lamp stand. The tube serves to receive a seal in order to install the lamp in a process chamber in a gastight manner. Power supply of the outer electrodes is separated from the power supply for the inner electrodes coming out of the lamp stand by means of the abovementioned tube. This makes it possible to prevent effectively parasitic discharges between the power supplies which are applied at different potentials during operation also in process chambers under negative pressure.
Abstract:
A short arc lamp with two transparent apertures. The lamp includes a sealed transparent arc chamber with an internal integral light reflector, and an external light reflecting element positioned external to the sealed arc transparent chamber.
Abstract:
A gas discharge lamp includes a base configured to receive electrical power from a power source and a high frequency ballast electrically connected to the base and configured to convert the electrical power to a high frequency AC waveform for driving a gas discharge tube. The gas discharge tube is configured to receive the high frequency AC waveform and emit UV light by passing the high frequency AC waveform through a mixture of gases contained within the gas discharge tube and to emit UV photons in response. A visible light emitting surface has a glass envelope of different geometry than the gas discharge tube and a phosphor coating is placed on the inside of the glass envelope. The glass envelope seals a volume around the gas discharge tube that is at least partially evacuated.
Abstract:
A flash lamp (10), comprising a gas-filled discharge tube (10) made of glass and, at each end, a power electrode (14, 15) that is sealed by means of a glass solder (13), has a glass including one or more of the following U.V. transmission values Tw: at 180 nm: Tw>5%, preferably >9 %; at 200 nm: Tw>30%, preferably >45%; at 254 nm: Tw>60%, preferably >80%. The inside diameter of the discharge tube (11) may be larger than 1.2 times the value of the plasma channel diameter. The starting electrode (16) may be part of the reflector (30-33) or be connected electrically thereto. Flash capacitor (42) may be designed for a charging voltage above 370 volts, preferably above 400 volts.