Abstract: A display device includes a display panel including a front substrate and a back substrate, a plurality of brackets attached to a non-display area of a back surface of the back substrate using an adhesive, and a backlight unit positioned in the rear of the display panel. The backlight unit includes a frame including at least one protrusion, a light guide plate disposed between the frame and the display panel, the light guide plate including at least one groove or hole corresponding to the at least one protrusion of the frame, an optical layer disposed between the light guide plate and the display panel, and a light source disposed on the side of the light guide plate.

Abstract: A ultraviolet irradiation apparatus includes: a first electrode block and a second electrode block located apart from each other in a first direction or located in an electrically-insulated state in the first direction; a recessed groove formed on a side surface of each of both the blocks; a first discharge lamp partially fitted into the recessed grooves formed in both the blocks and located across the both blocks; a power supply part for supplying electrical power to the first discharge lamp; a first current-carrying member electrically connecting the first electrode block and the power supply part; a second current-carrying member capable of electrically connecting the second electrode block and the power supply part at an electrical potential different from that of the first current-carrying member; and a light irradiation window for extracting ultraviolet light emitted from the first discharge lamp to outside.

Abstract: An ozone generating device including an excimer lamp having an arc tube containing a luminescent gas, a first electrode, and a second electrode. The arc tube has a first end portion and a second end portion, a first diameter-reduced portion provided continuously from the first end portion, a diameter of which decreases as a distance from the first end portion increases, and a second diameter-reduced portion provided continuously from the second end portion, a diameter of which decreases as a distance from the second end portion increases, the first electrode is provided for an outer periphery surface of the first end portion, the second electrode is provided for an outer periphery surface of the second end portion, the arc tube is fixed via the cylindrical portion, and the first electrode is not provided over the first diameter-reduced portion, and/or the second electrode is not provided over the second diameter-reduced portion.

Abstract: There are provided a glass tube in which a rare gas under predetermined pressure is sealed, a cathode electrode and an anode electrode disposed in a first end portion and a second end portion of the glass tube, respectively, facing each other, and a trigger electrode including a transparent conductive film formed on an outer peripheral surface of the glass tube. The trigger electrode includes an electrode body disposed on the outer peripheral surface of the glass tube, along a tube axis direction of the glass tube, and an enlarged portion that covers at least any one of the cathode electrode and the anode electrode, and that has a circumferential width wider than a circumferential width of the electrode body. This provides a flash discharge tube capable of reducing variations in optical distribution characteristics during light emission with a small amount of light, and improving life durability during continuous emission of a large amount of light and at short intervals.

Abstract: The microwave heating apparatus of the present invention enables microwaves to be propagated onto an object to be heated through a waveguide such that the microwaves propagate to a microwave space reduced by a wavelength controller which is arranged, as a solid-state object, to occupy a predetermined space in the waveguide. Thus, the microwave heating apparatus of the present invention heats the object to be heated which has been placed in the reduced space. The microwave heating apparatus of the present invention utilizes the effects of lengthening the wavelength of the microwaves propagating to the reduced space so as to be longer than the wavelength before entering the reduced space by a predetermined multiple depending on a near-cutoff condition.

Abstract: A measuring device (1) for determining a measured variable has a sensor device (2) that generates at least one primary signal depending on the measured variable to be determined, an electronics device (3), a transition section (4) located between the sensor device (2) and the electronics device (3), an interface (5) arranged in the transition section (4) for transmitting energy and/or signals and having at least one signal line (7) between the sensor device (2) and the electronics device (3) are provided. To provide a measuring device that has an interface for transmitting signals or energy, which is easier to access than in the measuring device of the prior art, the interface (5) and the signal line (7) can be reversibly connected for transmitting signals to one another.

Abstract: Disclosed herein an excimer discharge lamp that is capable of mitigating a stress concentration occurring due to a fixing method of an outer electrode, and achieving a desired life of lamp in an ensured manner. The excimer discharge lamp comprises: an arc tube for enclosing a luminous gas inside and having a sealing portion formed contiguous to, via a reduced diameter portion, one end of a tube shaped luminous portion; and an outer electrode of a net-like shape arranged on an outer peripheral surface of the art tube. The one end of the outer electrode being fixed via an outer electrode fixing member provided on an outer surface of the sealing portion.

Abstract: There is provided a calcium fluoride optical member formed from monocrystalline calcium fluoride and having a tubular shape. A {110} crystal plane or a {111} crystal plane of the monocrystalline calcium fluoride is orthogonal to a center axis of the tube.

Abstract: A liquid ejecting apparatus includes a signal modulation section that causes an original drive signal to be pulse-modulated to generate a modulation signal, a signal amplification section that amplifies the modulation signal to generate an amplification modulation signal, a coil that smooths the amplification modulation signal to generate a drive signal, a piezoelectric element that deforms when the drive signal is applied thereto, a cavity that expands or contracts due to a deformation of the piezoelectric element, and a nozzle that communicates with the cavity and ejects a liquid in accordance with an increase/decrease of a pressure inside the cavity. A core material of the coil is made of a Mn—Zn-based ferrite.

Abstract: A high-pressure discharge lamp having a starting aid and having a discharge vessel is disclosed, wherein the discharge vessel has two ends with seals, in which electrodes and possibly power supply lines are fastened, wherein the starting aid includes a wire system consisting of a core wire and a wrapping wire applied thereto, wherein the wrapping wire is a flat-pressed or flattened wire.

Abstract: An organic light emitting diode (OLED) lighting apparatus includes a light emitting panel including an organic light emitting diode, a housing for housing the light emitting panel, a cover coupled to the housing and covering a front-side edge of the light emitting panel, a plurality of pins disposed between the housing and the light emitting panel and supporting an edge of the light emitting panel, and at least one contact bar disposed between the plurality of pins and a back-side edge of the light emitting panel.

Abstract: A compact strobe device includes the following components: a flash discharge tube having an anode and a cathode; a conductive reflector storing a part of the flash discharge tube; a trigger coil having a hollow core, and a primary winding and a secondary winding around the core; and a conductor connecting the secondary winding of the trigger coil and the reflector. The trigger coil has an end of the flash discharge tube inserted into the core, and includes at an end thereof adjacent to the reflector, a secondary terminal connected to the secondary winding. The reflector has a bottom in contact with the outer peripheral surface of the flash discharge tube, the outer peripheral surface covering at least the region extending from the anode to the cathode. The conductor has a first contact portion in contact with the secondary terminal of the trigger coil, and a second contact portion in contact with the bottom of the reflector.

Abstract: This disclosure is directed to devices and methods for generating light with electrode-less plasma lamps. More particularly, the present invention provides plasma lamps driven by a radio-frequency source without the use of electrodes inside the bulb, and a pulse-width modulation device that provides RF power regulation, and related methods. The bulb comprises gaseous material with metal halides and/or light emitters that, when powered, substantially stays in an arc shape state. The switching pulse-width modulation device is operable at specific modulation frequencies, duty cycles, and durations to stabilize or control the arc state/mode, which enables consistent and high efficiencies.

Abstract: A dielectric barrier discharge lamp includes a lamp tube, a discharge gas, a support member, a first electrode, and a second electrode. The lamp tube has a first and a second sealed end. The discharge gas is filled in the lamp tube. The support member is disposed at the first sealed end and extended toward the inside of the lamp tube. The support member has an accommodating space with its opening facing the inside of the lamp tube. The first electrode is disposed in the lamp tube. A first terminal of the first electrode passes through the opening of the accommodating space. A gap exists between an end of the first terminal of the first electrode and a closed end of the accommodating space. A second terminal of the first electrode penetrates and is closely fitted with the second sealed end. The second electrode is disposed outside the lamp tube.

Abstract: A compact strobe device includes the following components: a flash discharge tube having an anode on one side thereof and a cathode on the other side thereof; a conductive reflector composing an external trigger electrode, the reflector being in contact with and storing a part of the flash discharge tube; a trigger coil having a primary winding and a secondary winding wound around a hollow core; and an elastic conductor connecting the secondary winding of the trigger coil and the reflector. The trigger coil has an end of the flash discharge tube inserted into the core, and includes, at the end thereof adjacent to the reflector, a secondary terminal connected to the secondary winding. The conductor elastically deforms to be in contact with the secondary terminal of the trigger coil and a lateral side of the reflector.

Abstract: A flash lamp comprises an arc tube in which a pair of electrodes are provided there inside, a reflective film formed on an outer surface of the arc tube, a trigger wire arranged along the arc tube outside the reflective film, wherein ceramic material is used for the reflective film, and at an end of at least one of end portions of the arc tube, an end edge of the reflective film in a longitudinal direction is located in a front side of the electrode.

Abstract: A lamp including a first and second lamp substrate with a first and second external electrode, respectively, and a first and second internal phosphor coating, respectively, wherein the first phosphor coating is a phosphor monolayer. A method of manufacturing a lamp, including screen-printing a phosphor monolayer on a first lamp substrate; screen-printing a phosphor layer on a second lamp substrate; joining the phosphor-coated faces of the first and second lamp substrates together with a seal; and joining a first and second electrode to the uncoupled exterior faces of the first and second lamp substrates, respectively.

Abstract: A backlight assembly comprising: a plurality of fluorescent lamps each including a lamp tube having a fluorescent layer, a discharge gas contained in the lamp tube, a first electrode disposed in the lamp tube, and a conductive terminal capacitively coupled to the first electrode; and a lamp socket which secures the plurality of fluorescent lamps.

Abstract: A high-pressure discharge lamp with a starting aid, may include a discharge vessel, wherein the discharge vessel has two ends with seals, in which electrodes are fastened, wherein the starting aid is fitted on the outside of the discharge vessel, wherein the starting aid has a local field amplifier having a configuration with at least one tip or edge or structure with a small radius of curvature, and wherein the starting aid produces a corona discharge which emits UV radiation into the discharge vessel.

Abstract: A high pressure gas discharge lamp comprising a discharge vessel, an outer envelope enclosing said discharge vessel with an interspace between the outer envelope and the discharge vessel. A UV-enhancer having a wall enclosing an electrode space with a filling gas and an internal electrode extending from the electrode space through the wall to the interspace. Said UV-enhancer is arranged in said interspace between the outer envelope and the discharge vessel, said wall of the UV-enhancer being made of ceramic material and contains said filling gas. The electrode is directly sealed into the wall.

Abstract: The invention relates to a high-pressure discharge lamp having an ignition aid and comprising a discharge vessel, which is accommodated in an outer bulb. The ignition aid is a UV enhancer having a can-like container (12), which has an inner electrode (18). At least part of the end-face edge of the inner electrode at least comes close to the end face (24) of the container (12). An external electrode is attached to the outside of the container.

Abstract: A vacuum ultraviolet (VUV) photon source includes a body, a VUV window, electrodes disposed on the body outside an interior thereof, and a dielectric barrier between the electrodes. A method for generating VUV photons includes generating a dielectric barrier discharge (DBD) in an interior of a photon source by applying a periodic voltage between a first electrode and a second electrode separated by a dielectric barrier, wherein the DBD produces excimers from a gas in a gap between the electrodes, and transmitting VUV photons through a window of the photon source.

Abstract: A light emitting lamp, a backlight assembly and a display device including the same are provided. The light emitting lamp includes a lamp tube longitudinally extended along an extension line, and a plurality of set electrodes disposed on a periphery of the lamp tube and along the extension line. The periphery of the lamp tube is divided into a first region and a second region by a plane including the extension line, and each of the set electrodes includes a first electrode disposed on the first region and a second electrode disposed on the second region.

Abstract: A dielectric barrier discharge lamp includes a lamp tube, a discharge gas, a support member, a first electrode, and a second electrode. The lamp tube has a first and a second sealed end. The discharge gas is filled in the lamp tube. The support member is disposed at the first sealed end and extended toward the inside of the lamp tube. The support member has an accommodating space with its opening facing the inside of the lamp tube. The first electrode is disposed in the lamp tube. A first terminal of the first electrode passes through the opening of the accommodating space. A gap exists between an end of the first terminal of the first electrode and a closed end of the accommodating space. A second terminal of the first electrode penetrates and is closely fitted with the second sealed end. The second electrode is disposed outside the lamp tube.

Abstract: A high-pressure discharge lamp having an ignition aid, may include a discharge vessel which is fitted in an outer bulb, wherein a UV enhancer is fitted as an ignition aid in the outer bulb, wherein the UV enhancer comprises a UV-transparent can-like container having an inner wall and end side and longitudinal axis, the container enclosing with its inner wall a cavity which is filled with a gas that can emit UV radiation, an inner vent electrode, which has at least one bend or kink, being fitted in the cavity in such a way that a bend or kink lie as close as possible to the inner wall of the container, and wherein an external electrode is applied externally in the vicinity of the container.

Abstract: Embodiments of a lamp comprise an arctube and an ignition aid that couples with the arctube to allow discharge to occur at lower breakdown voltages and without the need for radioactive material (e.g., Kr85). The ignition aid has an elongated body that extends in parallel relation to the arctube. One or more extension members extend from the elongated body to contact the arctube. In one example, the extension members include a pair of contacts, which couple with the arctube to provide both electrical connectivity and mechanical support.

Abstract: A high-pressure discharge lamp with a starting aid, may includ a discharge vessel, wherein the discharge vessel has two ends with seals, in which electrodes are fastened, wherein the starting aid is fitted on the outside of the discharge vessel, wherein the starting aid has a local field amplifier having a configuration with at least one tip or edge or structure with a small radius of curvature, and wherein the starting aid produces a corona discharge which emits UV radiation into the discharge vessel.

Abstract: A dielectric barrier discharge lamp is described, including a discharge tube having an elongated shape and enclosing a discharge gas therein, and a pair of electrodes. A portion of an outer peripheral surface of the discharge tube in a longitudinal direction of the discharge tube is defined as a light extraction area for extracting light induced in the discharge tube to an outside. The pair of the electrodes are placed on the outer peripheral surface such that the light extraction area is positioned between the pair of the electrodes in a peripheral direction of the outer peripheral surface of the discharge tube.

Abstract: A high-pressure discharge lamp with an ignition aid has a discharge vessel which is mounted in an outer bulb, the discharge vessel comprising two ends having seals in which electrodes are secured, and a frame having a clip wire retaining the discharge vessel in the outer bulb. The clip wire comprises a plate-like part acting as an ignition aid and facing the seal of the opposite pole electrode.

Abstract: A discharge lamp having an improved run-up time is disclosed. In an embodiment, the discharge lamp includes a light-transmissive discharge tube extending from a first end to a second end and having an inner surface and an outer surface, a phosphor coating layered onto the inner surface of the discharge tube, and a fill gas composition capable of sustaining a discharge sealed within the discharge tube. Also included is a resistive heating wire positioned about the outer surface of the discharge tube. In some embodiments, a lamp driver circuit is included that operates when the lamp is turned ON to provide power to electrodes in the discharge tube and to provide power to the resistive heating wire, and operates to disconnect power from the resistive heating wire when the discharge lamp achieves a predetermined percentage of its stabilized lumen output.

Abstract: A dual external electrode fluorescent lamp and manufacturing method thereof comprising a 1st glass tube with both ends open and an inner wall optionally coated with a fluorescent material, wherein the diameter of the opened ends is extended; connecting the 1st glass tube with two 2nd glass tubes by joining both opened ends of the 1st glass tube to the two both-end opened 2nd glass tubes that have a diameter larger than that of the 1st glass tube; joining a 1st multi-tube for the enlargement of an electrode area in the one 2nd glass tube or a ‘flare’ structure having one closed end to one end of 2nd glass tube through insertion after spreading one end widely, and enlarging an electrode area in the other 2nd tube and joining a 2nd multi-tube having an exhaust port to the other 2nd tube through insertion; cutting and sealing a portion of the exhaust port after vacuuming the inside of the glass tubes and injecting discharge gas inside the glass tubes through the connection of an exhaust system to the exhaust port

Abstract: In a high-pressure discharge lamp including a ceramic discharge vessel, a secure connection between a hybrid antenna as starting aid and a leadthrough of the discharge vessel is provided by virtue of the fact that a means between leadthrough and extension limits the ohmic resistance between leadthrough and hybrid antenna preferably to at most 100?.

Abstract: A mercury-free vehicle discharge bulb is provided. The discharge bulb includes an arc tube a glass shroud extending in a front-rear direction to cylindrically surround the arc tube, a metal band surrounding and holding a rear end portion of the glass shroud, and an insulating plug supporting the glass shroud in a fixed manner via the metal band. A ratio S1/S2 of a first area S1 to a second area S2 is 1 to 3. The first area S1 is a surface area of an outer surface of the glass shroud in a region from a circumference of the glass shroud at a position of a center of the discharge space to a front end edge of the metal band, and the second area S2 is a surface area of a surface of the metal band that touches the glass shroud.

Abstract: A discharge lamp including: a discharge vessel 10B configured by a light-transmissive non-electrically conducting member with a light-emitting substance sealed inside; one out of a pair of antenna members 10D with a portion at one end provided inside the discharge vessel 10B and a portion at the other end projecting outside the discharge vessel 10B and covered by a non-electrically conducting member; the other of the pair of antenna members 10D with a portion at one end provided inside the discharge vessel 10B and a portion at the other end projecting outside the discharge vessel 10B, covered by a non-electrically conducting member and capable of being connected to an electromagnetic waveguide path; and a loading coil 10E wound around the portion of the first antenna member 10D that is covered by the non-conducting member. A point light source can be achieved as well as performing power supply with good efficiency.

Abstract: A lucent plasma crucible having a closed body for enclosing a fill material filled in a void formed within the closed body and enclosed by the closed body, the fill material being excitable by microwave energy to generate a light-emitting plasma. The crucible is dimensioned to have low order TE or TM microwave mode properties. The orders of the modes are 0, 1 or 2. Crucibles may be regular or irregular in shape. For circular cylindrical crucibles having diameter (d) in cm, length (l) in cm, and operating frequency (f) in MHZ, (d/l)2 is between 0 and 100, and (d×f)2 is between 0 and 2×109. Also 0<(d/l)2<20 and 0<(d×f)2<1.5×109 may be used.

Abstract: A light source to be powered by microwave energy, the source having: a body having a sealed void therein, a microwave-enclosing Faraday cage surrounding the body, a fill in the void of material excitable by microwave energy to form a light emitting plasma therein, and an antenna arranged within the body for transmitting plasma-inducing, microwave energy to the fill, the antenna having: a connection extending outside the body for coupling to a source of microwave energy; wherein the body is a solid plasma crucible of material which is lucent for exit of light therefrom, the plasma crucible is contoured with a contoured surface to reflect light internally within the lucent crucible material to exit in a particular direction, the Faraday cage is at least partially light transmitting for light exit from the plasma crucible in the particular direction.

Abstract: Dielectric barrier discharge plasma actuators are used to manipulate exhaust flow within and behind a jet engine nozzle. The dielectric barrier discharge plasma actuators may be used to direct cooling airflow near the surface of the nozzle to reduce heating of the nozzle, create thrust vectoring, and reduce noise associated with the exhaust flow exiting the nozzle.

Abstract: Two or more separate discharge spaces (8, 9) are provided in the discharge vessel (2) of a dielectric barrier discharge lamp (1), said discharge spaces (8, 9) each being filled with a discharge medium. This provides the possibility of producing radiation with two or more wavelengths which are characteristic of the respectively used discharge media using a single lamp (1).

Abstract: The compact fluorescent lamp comprises a bulb shaped outer envelope enclosing a discharge tube having a coiled configuration and a ballast unit for controlling the current in the tube. The lamp further comprises at least one joint mechanical support and starting aid means for positioning the discharge tube and the ballast unit and reducing a breakdown voltage path of the discharge tube. The at least one mechanical support and starting aid means is made of an electrically conducting material and connected electrically to at least one of the electrodes. The neck portion has a retaining member, and the mechanical support and starting aid means is supported by the retaining member and clamped on the discharge tube at least at a location in a vicinity of a middle section of the arc path. The mechanical support means further comprises at least one support section to provide support against an apex of the outer envelope, and at least one fixing section for fixing of the discharge tube.

Abstract: A lamp having: an arc tube (30) including a main tube portion and a pair of thin tube portions (46) provided at ends of the main tube portion; and an adjacent conductor (78) including a strip-shaped metal plate. In the adjacent conductor (78), a portion of the metal plate in the direction of length thereof, from the middle of the metal plate to just before an edge thereof, is a gripping portion (92) having a shape suitable for gripping the outer circumferential of one of the thin tube portions (46). One end of the gripping portion (92) is a free end. The gripping portion (92) is disposed along an outer circumferential surface of the thin tube portion (46) so as to be in contact with the outer circumferential surface, and is elastically deformable in accordance with expansion in the radial direction of the thin tube portion (46).

Abstract: A dielectric barrier discharge lamp is described, including a discharge tube having an elongated shape and enclosing a discharge gas therein, and a pair of electrodes. A portion of an outer peripheral surface of the discharge tube in a longitudinal direction of the discharge tube is defined as a light extraction area for extracting light induced in the discharge tube to an outside. The pair of the electrodes are placed on the outer peripheral surface such that the light extraction area is positioned between the pair of the electrodes in a peripheral direction of the outer peripheral surface of the discharge tube.

Abstract: A lamp electrode includes a sealed tube for generating light when powered by an external power supply and a pair of electrodes formed on the ends of the sealed tube. Solder is filled into the space between each electrode and the sealed tube, and formed on the surface of the exterior surface of the electrodes. A method for forming the lamp electrode includes forming a cylindrically shaped electrode on an end of a sealed tube; maintaining a supply of solder in the liquid state; and dipping the end of the tube on which the electrode is formed into the solder.

Abstract: A compact gas discharge lamp (301) comprising four (or more) interconnected tube segments (11, 12, 13, 14) is provided with an external electrode (310) that extends at least throughout the length of the tube segments and that is in contact with all tube segments. Several embodiments of the external electrode are disclosed. The external electrode is preferably connected to a node (C) midway between the lamp electrodes, to which end a capacitive divider (441, 442) is arranged in parallel with the lamp.

Abstract: A lamp and methods of forming are shown. In one example, a dielectric layer is formed over a gap between conductors in a plasma lamp. Electric arcing is reduced or eliminated, thus allowing tighter gaps and/or higher voltages. In one example a glass frit method is used to apply the dielectric layer. A lamp is shown with a barrier layer that prevents tarnish such as tarnish from sulfur exposure. The barrier layer reduces or prevents degradation of the lamp due to conversion of a conductor material to non-conductive tarnish material.

Abstract: An illumination device for a microscope, in particular for an operation microscope, has a light source with an improved lifetime. The light source is in the form of a gas discharge lamp having a microwave generator, a microwave waveguide and an electrodeless bulb. The bulb contains a luminescent material and is coupled to the microwave waveguide so that microwaves can stimulate the luminescent material to emit light.

Abstract: A dielectric barrier discharge (DBD-) lamp (1) comprising a discharge volume (2) which is delimited by a first and a second wall (4, 5) is disclosed, wherein both walls (4, 5) are exposed to different electrical potentials by means of a power supply (11) for exciting a gas discharge within the discharge volume (2). By providing at least one electrically conductive ignition aid or igniter which extends within the discharge volume (2) and which electrically contacts the first and the second wall (4, 5) with each other, a significant reduction of the initial ignition voltage of the lamp (1) can be obtained, especially after long pauses of operation of the lamp (1).

Abstract: A start assisting light source is configured such that it can be mounted simply and reliably at a position capable of efficiently radiating UV-light for enhancing the starting performance of a high pressure discharge lamp to discharge chamber without being heated to a high temperature during lighting of the lamp and also adopted to a simple constitution of not increasing the manufacturing cost. A start assisting light source includes an airtight vessel filled with a rare gas and a pipe member that penetrates through the vessel is mounted to an electrode lead which protrudes from the end face of an electrode seal portion secured to a bottom hole of the concave reflector by inserting the electrode lead through the pipe member.

Abstract: An electrodeless plasma lamp and method of generating light are described. The lamp may comprise a lamp body, a source of radio frequency (RF) power and a bulb. The lamp body may comprise a solid dielectric material and at least one conductive element within the solid dielectric material. The source of RF power is configured to provide RF power and an RF feed configured to radiate the RF power from the RF source into the lamp body. One or more tuning mechanisms allow tuning of the lamp body to a given resonant frequency. The bulb is positioned proximate the lamp body and contains a fill that forms a plasma when the RF power is coupled to the fill from the lamp body. The at least one conductive element is configured to concentrate an electric field proximate the bulb.

Abstract: In an excimer lamp, rare gas and fluorine are enclosed inside a translucent ceramics arc tube. External electrodes are formed on an outer surface of the arc tube. A condition of 2.5+0.5 log(CF)?G?14?4 log(CF) is satisfied in the case of 0.1?CF?10, wherein G (mm) is a discharge gap in the arc tube and CF (%) is molar concentration of the fluorine.

Abstract: To avoid a decline in the reflectivity of an ultraviolet reflection film caused by lighting for an extended period of time and providing a uniform illuminance an excimer lamp has a silica glass discharge vessel with electrodes on opposite sides of the discharge vessel, wherein excimer discharge is generated in the discharge space of the discharge vessel, wherein an ultraviolet reflection film made of silica particles and alumina particles is formed on a surface exposed to the discharge space and wherein the mean particle diameter of silica particles is at least 0.67 times as large as the mean particle diameter of the alumina particles. The alumina particles in the ultraviolet reflection film preferably constitute at least 5 wt % and more preferably at least 10 wt % of the sum of silica particles and alumina particles.