Abstract: A reflector element and a method for manufacturing a reflector element are disclosed. In an embodiment the reflector element includes a plastic substrate and a silver layer arranged on the plastic substrate. The reflector element further includes a first barrier layer arranged on the silver layer, wherein the barrier layer has an at least 15 nm-thick oxide layer and a second barrier layer arranged on the first barrier layer, wherein the barrier layer includes siloxane, and wherein a thickness of the second barrier layer is at least 250 nm and at most 450 nm.

Abstract: A reflector element and a method for manufacturing a reflector element are disclosed. In an embodiment the reflector element includes a plastic substrate and a silver layer arranged on the plastic substrate. The reflector element further includes a first barrier layer arranged on the silver layer, wherein the barrier layer has an at least 15 nm-thick oxide layer and a second barrier layer arranged on the first barrier layer, wherein the barrier layer includes siloxane, and wherein a thickness of the second barrier layer is at least 250 nm and at most 450 nm.

Abstract: The invention relates to a phosphor wheel comprising a carrier (16) and a plurality of pre-manufactured, individual, jointed segments (20) that are mounted on the carrier (16). At least a few of the segments (20) comprise a luminescent substance.

Abstract: An optoelectronic semiconductor component includes a light source, a housing and electrical connections, wherein the light source has a chip which emits primary radiation in the UV or blue region with a peak wavelength in particular in the region of 300 to 490 nm, wherein the primary radiation is partially or completely converted into radiation of a different wavelength by a previously applied conversion element, characterized in that the conversion element has a translucent or transparent substrate, which is manufactured from ceramic or glass ceramic, wherein a glass matrix is applied to the substrate, with a phosphor being embedded in said glass matrix.

Abstract: A high pressure discharge lamp may include a ceramic discharge vessel and a longitudinal axis, wherein at least one electrode is led out of the discharge vessel by means of a metal-containing feed-through, wherein the feed-through is connected to one end of the discharge vessel by way of a ceramic-containing adjustment part, wherein the adjustment part is tubular and consists of individual layers with different compositions, at least two materials A and B forming a plurality of layers of the adjustment part, these materials being chosen such that their coefficient of thermal expansion is between that of the feed-through and that of the end of the discharge vessel or at most is just outside, the layer thickness of each layer being so low that no shearing forces can occur, and the layer thickness of each layer of the same material being different.

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 high pressure discharge lamp may include a ceramic discharge vessel and a longitudinal axis, wherein at least one electrode is led out of the discharge vessel by means of a metal-containing feed-through, wherein the feed-through is connected to one end of the discharge vessel by way of a ceramic-containing adjustment part, wherein the adjustment part is tubular and consists of individual layers with different compositions, at least two materials A and B forming a plurality of layers of the adjustment part, these materials being chosen such that their coefficient of thermal expansion is between that of the feed-through and that of the end of the discharge vessel or at most is just outside, the layer thickness of each layer being so low that no shearing forces can occur, and the layer thickness of each layer of the same material being different.

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: An apparatus for making a ceramic arc tube for high intensity discharge (HID) lighting applications is provided wherein the arc tube contains a high buffer gas pressure and RF induction heating is used to melt a frit material to form a hermetic seal.

Abstract: A ceramic arc tube for high intensity discharge (HID) lighting applications is provided wherein the arc tube contains a high buffer gas pressure. A method and apparatus for making the arc tube are also provided wherein RF induction heating is used to melt a frit material to form a hermetic seal.

Abstract: A method of bonding two ceramic parts to each other includes the steps of preparing a water-based slurry from Al2O3 powder and Y(NO3)3 solution in amounts that yield a eutectic compound of Al2O3 and Y2O3 when heated, placing the slurry in liquid, solid or gaseous form in direct contact with two ceramic parts that are to be bonded to each other, and heating the slurry to a temperature that bonds the two ceramic parts to each other. The method is particularly useful to join two ceramic parts where one is comprised of polycrystalline alumina and the other is comprised of one of single crystal alumina and polycrystalline alumina, such as an arc discharge vessel for a high intensity discharge lamp.

Abstract: A ceramic arc tube for high intensity discharge (HID) lighting applications is provided wherein the arc tube contains a high buffer gas pressure. A method and apparatus for making the arc tube are also provided wherein RF induction heating is used to melt a frit material to form a hermetic seal.

Abstract: A ceramic arc tube for high intensity discharge (HID) lighting applications is provided wherein the arc tube contains a high buffer gas pressure. A method and apparatus for making the arc tube are also provided wherein RF induction heating is used to melt a frit material to form a hermetic seal.

Abstract: A ceramic arc tube for high intensity discharge (HID) lighting applications is provided wherein the arc tube contains a high buffer gas pressure. A method and apparatus for making the arc tube are also provided wherein RF induction heating is used to melt a frit material to form a hermetic seal.

Abstract: A method for producing a metal-halide discharge lamp with a ceramic dische vessel is distinguished in that first both ends (6a, 6b) are equipped with electrode systems and sealed off, but a filling bore (15) remains in the vicinity of the pump end (6a) and is not closed until after the filling.

Abstract: To make a small high-pressure discharge lamp, for example of 50 W rating or less, and suitable, for example, for automotive applications, a quartz glass tube is heated, formed with constrictions, and a gas passed therebetween to expand the portion of the tube between the constrictions into olive shape to form the discharge vessel (6). A preformed first electrode system is introduced through one of the constrictions. The electrode system preferably has a zig-zag lead (9) slightly larger than the internal diameter of the tube to provide for self-centering. The tube is then isolated from atmosphere, for example by being placed in a glove box or coupled to a pumping head (15), for introduction therein of a fill substance, for example in pellet form, of a metal halide and, if desired, mercury; and a fill gas, such as argon or, preferably, xenon, preferably after cleaning and flushing the tube.