A light emitting sealed body includes a housing which stores a discharge gas in an internal space and is provided with a first window portion to which first light is incident and a second window portion from which second light is emitted. The housing includes at least one flow path which is partitioned from the internal space and extends toward at least one of the first window portion and the second window portion.

Modules, systems and methods that disinfect surfaces using ultraviolet (UV) light are disclosed. In one aspect, a UV light-emitting module comprises an enclosure comprising a rear wall and a face plate spaced from the rear wall and comprising a light-transmitting aperture. At least one sidewall extends between the rear wall and the face plate, and at least one UV light emitter is within the enclosure. A ventilation opening is located in one or more walls selected from (1) the rear wall and (2) the at least one sidewall.

An excimer lamp includes a dielectric tube, an end cap, a conductive hollow tube, and an electrode grid. The dielectric tube has a closed end and an open end, and defines a cavity. The end cap sealingly covers the open end. The conductive hollow tube passes through the end cap and into the cavity of the dielectric tube, with a volume defined between an exterior surface of the conductive hollow tube and an interior surface of the dielectric tube. The volume is configured to hold a gas. The electrode grid is disposed on an exterior surface of the dielectric tube.

In the excimer lamp according to the present invention, a flat discharge vessel having a substantially rectangular cross-sectional shape and comprising a pair of planar parts and a pair of side-surface parts has a pair of external electrodes disposed on the respective outer surfaces of the planar parts. The end parts of the external electrodes are provided with an auxiliary electrode extending to a region that is made smaller than the distance between the planar parts. A lead that supplies electricity to the external electrode is connected to the auxiliary electrode in the region that is made smaller than the distance between the planar parts.

The present invention provides a deep ultraviolet radiation apparatus that is safe and has a high bacteria eliminating effect.

The ultraviolet radiation apparatus comprises an optical filter that prevents the transmission of ultraviolet light of 240 nm or more emitted from a phosphor, wherein the optical filter is arranged facing light emitting surfaces of a gas-discharging tube array-type surface-emitting ultraviolet light source device comprising phosphor layer having a broad emission spectrum with a wavelength width of at least 210 nm to 250 nm with a peak wavelength of 228 nm. Light irradiated from the light source device is incident on a filter membrane with an incident angle thereof being altered by a transparent substrate of the optical filter. An ozone generation space may be formed between the surface-emitting ultraviolet light source device and the optical filter.

A flash lamp includes a bulb including a stein, conductive linear members extending to penetrate the stein, and a trigger probe having a discharging portion configured to control discharge, wherein the conductive linear member has a lead pin and an anode protruding toward the conductive linear member on a tip end side of the conductive linear member with respect to the lead pin, wherein the lead pin and the anode are integrally formed members, wherein the conductive linear member has a lead pin and a cathode protruding toward the conductive linear member on a tip end side of the conductive linear member with respect to the lead pin, wherein the lead pin and the cathode are integrally formed members, and wherein the discharging portion of the trigger probe is disposed between the anode and the cathode.

A flash lamp includes a bulb including a stein, conductive linear members extending to penetrate the stein, and a trigger probe having a discharging portion configured to control discharge, wherein the conductive linear member has a lead pin and an anode protruding toward the conductive linear member on a tip end side of the conductive linear member with respect to the lead pin, wherein the lead pin and the anode are integrally formed members, wherein the conductive linear member has a lead pin and a cathode protruding toward the conductive linear member on a tip end side of the conductive linear member with respect to the lead pin, wherein the lead pin and the cathode are integrally formed members, and wherein the discharging portion of the trigger probe is disposed between the anode and the cathode.

A glass-metal feedthrough consists of an external conductor, a glass material and an internal conductor. The internal conductor has a coefficient of expansion α.sub.internal, the glass material has a coefficient of expansion α.sub.glass, and the external conductor has a coefficient of expansion α.sub.external. The coefficient of expansion of the internal conductor α.sub.internal is greater than the coefficient of expansion of the glass material α.sub.glass and the coefficient of expansion of the external conductor α.sub.external is at least 2 ppm/K, such as at least 4 ppm/K, greater than the coefficient of expansion of the glass material α.sub.glass in the temperature range of 20° C. to the glass transformation temperature.

A lighting element with a gaseous tritium light source and an elongated plastic housing that at least partially encloses the gaseous tritium light source with its housing shell and forms a latching element that snaps together with the gaseous tritium light source, which can be inserted into the plastic housing, and holds it in the plastic housing. A rugged lighting element can be produced if the latching element is formed by at least one catch element, which catch element has a radially sprung flexible spring and at least one, preferably two, inwardly oriented snaps with an indentation for snapping together with the gaseous tritium light source.

An excimer lamp includes light-emitting gases containing krypton gas and chlorine gas in a sealing body composed of fused quartz glass having an absorption band at least in a wavelength band of 240 nm to 260 nm. An ultraviolet light irradiation device includes: an excimer lamp having light-emitting gases containing krypton gas and chlorine gas in a sealing body; a housing having an extraction part for extracting ultraviolet light emitted from an excimer lamp; and fused quartz glass disposed in the extraction part and having an absorption band at least in a wavelength band of 240 nm to 260 nm.