An excimer lamp includes a housing portion having a sealed internal space, an internal electrode, and a discharge gas with which the internal space is filled. One end side of the internal electrode is electrically connected to a power supply member provided with a metal foil electrically connected to the internal electrode and is sealed together with the power supply member to one end side of the housing portion via a sealing portion. The other end side of the internal electrode protrudes into the internal space. A protrusion length, being a length of the internal electrode in the internal space and a length from one end of the internal space to the other end of the internal electrode, is equal to or less than a length from the other end of the internal electrode to the other end of the internal space in a direction along the axis.

A light emitting sealed body includes: a housing containing light-emitting gas in an internal space and formed with an opening on which first light is incident and/or from which second light is emitted, wherein the first light is laser light for maintaining a plasma generated in the light-emitting gas and the second light is light from the plasma; and a window member that transmits the first light and/or the second light at the opening. The window member is joined to the housing by a joining material consisting of a material containing gold.

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.

A light emitting sealed body includes: a housing containing light-emitting gas in an internal space and formed with an opening on which first light is incident and/or from which second light is emitted, wherein the first light is laser light for maintaining a plasma generated in the light-emitting gas and the second light is light from the plasma; and a window member that transmits the first light and/or the second light at the opening. The window member is joined to the housing by a joining material consisting of a material containing gold.

A method and apparatus for a sealed high intensity illumination device are disclosed. The device is configured to receive a laser beam from a laser light source. The device has a sealed chamber configured to contain an ionizable medium. The chamber has a substantially flat ingress window disposed within a wall of the integral reflective chamber interior surface configured to admit the laser beam into the chamber, a plasma sustaining region, a plasma ignition region, and a high intensity light egress window configured to emit high intensity light from the chamber. The chamber has an integral reflective chamber interior surface configured to reflect high intensity light from the plasma sustaining region to the egress window. There is a direct path of the laser beam from the laser light source through the lens and ingress window to the lens focal region.

An excimer lamp includes a housing portion having a sealed internal space, an internal electrode, and a discharge gas with which the internal space is filled. One end side of the internal electrode is electrically connected to a power supply member provided with a metal foil electrically connected to the internal electrode and is sealed together with the power supply member to one end side of the housing portion via a sealing portion. The other end side of the internal electrode protrudes into the internal space. A protrusion length, being a length of the internal electrode in the internal space and a length from one end of the internal space to the other end of the internal electrode, is equal to or less than a length from the other end of the internal electrode to the other end of the internal space in a direction along the axis.

An excimer lamp includes a first electrode, a dielectric plate, and a second electrode. The dielectric plate has a first side and a second side opposite the first side. The dielectric plate is spaced a distance from the first electrode to define a volume configured to hold a gas. The first side of the dielectric plate is oriented toward the first electrode. The second electrode is oriented toward the dielectric plate, wherein the dielectric plate is interposed between the first electrode and the second electrode.

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.

An excimer lamp includes a plurality of sheets and a plurality of spacers arranged to form a stack of a plurality of cells in comprising a plurality of chambers. The plurality of sheets includes a first outer sheet, a second outer sheet and a plurality of interior sheets. Each sheet in the plurality of sheets has an outer edge and comprises a material that is transmissive to a target wavelength. Each spacer is placed between two sheets and near the outer edge of each sheet. Each chamber is defined by a volume at least partially enclosed by the two sheets and at least one spacer. An emission material is within each chamber. A first electrode is coupled to the first outer sheet, exterior to the stack, and a second electrode is coupled to the second outer sheet, exterior to the stack. A method of manufacturing the excimer lamp is also disclosed.

In some embodiments, an electrodeless lamp may be provided. The lamp may include an outer tube and an inner tube. The inner tube may be sealed to the outer tube to define a sealed space in which a gas may be contained. The gas may be configured to emit electromagnetic radiation when an electromagnetic field is applied thereto.