mercury arc lamp

When power is applied, if there is sufficient voltage to ionize the argon, the ionized argon gas will strike a small arc between the starting electrode and the adjacent main electrode. To correct the bluish tinge, many mercury vapor lamps are coated on the inside of the outer bulb with a phosphor that converts some portion of the ultraviolet emissions into red light. A mercury-vapor lamp is a gas-discharge lamp that uses an electric arc through vaporized mercury to produce light. The MLB series Mercury lamp ballasts are offered in 5 sizes from 650 to 7000 watts. n. a lamp producing a light with a high actinic and ultraviolet content by means of an electric arc in mercury vapor. One of the original complaints against mercury lights was they tended to make people look like "bloodless corpses" because of the lack of light from the red end of the spectrum. Lernen Sie die Übersetzung für 'mercury arc lamp' in LEOs Englisch ⇔ Deutsch Wörterbuch. Remove this product from your comparison list? Polycarbonate suffers particularly from this problem, and it is not uncommon to see fairly new polycarbonate surfaces positioned near the lamp to have turned a dull, yellow color after only a short time. They also require a warm-up period of four to seven minutes to reach full light output. These lamps provide intense radiation corresponding to the photo-sensitivity of most presently available photoresist materials. The XLB series lamp ballasts are offered in 7 sizes from 150 to 6000 watts and are constant current sources designed for precision operation of short-arc Xenon lamps. This 200 watt Hg lamp has a 0.6 x 2.2 mm effective arc size. [1] "Color corrected" mercury bulbs overcome this problem with a phosphor on the inside of the outer bulb that emits white light, offering better color rendition. It was widely used starting in the 1870s for street and large building lighting until it was superseded by the incandescent lightin the early 20th century. The reason for a prolonged period of time before the lamp restrikes is because the elevated pressure, which leads to higher breakdown voltage of the gas inside (voltage needed to start an arc – Paschen's law), which is outside the capabilities of the ballast. To access this and other valuable technical resources, please sign in or register for a new online account. [7] In 1903, Hewitt created an improved version that possessed higher color qualities which eventually found widespread industrial use. It also regulates the arc tube operating temperature and acts as a filter to absorb ultraviolet radiation. The mercury vapor lamp is a negative resistance device. They have many intense bands at wavelengths across the UV and visible light spectrum and emit bright UV light. Mercury arc lamps usually feature starting coils on one or both of the electrodes to assist in arc formation during ignition and have an anode-cathode gap ranging from 0.25 to several millimeters, depending upon the lamp power rating. If the discharge should be interrupted (e.g. Provide an order number and postal code to check the status of an order or download an invoice for an order that has shipped. Mercury (Hg) arc lamps are ideal light sources for applications that require high intensity spectral lines emitted in the deep UV to visible light regions. HXP lamps are short arc lamps in which the discharge arc burns in an atmosphere of mercury vapour at very high pressure. Choose products to compare anywhere you see 'Add to Compare' or 'Compare' options displayed. osram.com.tr HXP -Lampen sind Kur zb ogenlampen, bei denen der Entladungbogen in einer At mo sphär e v on Quecksilber unter hohem Druck bre nnt . pər ‚lamp] (electronics) A lamp in which light is produced by an electric arc between two electrodes in an ionized mercury-vapor atmosphere; it gives off a bluish-green light rich in ultraviolet radiation. The increase in pressure results in further brightening of the lamp. In the EU the use of low efficiency mercury vapor lamps for lighting purposes was banned in 2015. For the character in the Rozen Maiden anime and manga, see, Learn how and when to remove this template message, History of street lighting in the United States, "Two Centuries of Electric Light Source Innovations", Two Centuries of Electric Light Sources Innovations, Mercury vapour lamps and action of ultra violet rays – Transactions of the Faraday Society (RSC Publishing), Persistent Lines of Neutral Mercury (Hg I), "Crystec Technology Trading GmbH, Low pressure mercury-vapor lamps". Between the electrode and the quartz glass, a non-matching gas-tight joint is formed with a molybdenum foil. They give light immediately on startup, but usually need a few minutes to restrike if power has been interrupted. The tube is filled with mercury and argon. vapor lamp is a high intensity discharge lamp. Product family … Mercury and xenon arc-lamps are white light sources that produce a wide range of wavelengths from ultraviolet (UV) to infrared (IR). What is the definition of mercury arc lamp? ), which has found application in modern compact projection devices. Hg arc lamps do have an unspecified shelf life, which over time can cause the end cap seals to leak and degrade lamp performance. [citation needed], High-pressure mercury vapor (and some specially-designed metal-halide) lamps find application in molecular spectroscopy due to providing useful broadband continuum ("noise") energy at millimeter and terahertz wavelengths, owing to the high electron temperature of the arc plasma; the main UV emission line of ionized mercury (254 nm) correlates to a blackbody of T= 11,500 K. This property makes them among the very few simple, inexpensive sources available for generating such frequencies. There is also an increase in red color (e.g., due to the continuous radiation) in ultra-high-pressure mercury vapor lamps (usually greater than 200 atm. Login to view your complete order history. The 6283NS Mercury Arc Lamp contains an exactly measured amount of mercury and either argon gas or xenon which acts as a starter gas as the mercury vaporizes. What are synonyms for mercury arc lamp? Unlike most other UV sources, the medium-pressure lamp (MPL) has a polychromatic spectral distribution from 190 nm up to the infrared spectrum. Enter your email address below to reset your account password. This is the only kind of mercury vapor lamp that can be connected directly to the mains without an external ballast. The outer bulb may be clear or coated with a phosphor; in either case, the outer bulb provides thermal insulation, protection from the ultraviolet radiation the light produces, and a convenient mounting for the fused quartz arc tube. In fact, the first British fluorescent lamps were designed to operate from 80-watt mercury vapor ballasts. It uses an arc through vaporized mercury in a high pressure tube to create very bright light directly from it's own arc. [citation needed], Mercury vapor lamps are used in the printing industry to cure inks. HBO 200W: 400 hrs. United States Patent 4156826 . Creating a nearly shadow-free light and less glare, the lamp immediately found wide use for industrial and street lighting in the United States. These are typically high powered to rapidly cure and set the inks used. The outer bulb may be clear or coated with a phosphor; in either case, the outer bulb provides thermal insulation, protection from the ultraviolet radiation the light produces, and a convenient mounting for the fused quartz arc tube. In addition, shorter wavelengths in the mid-infrared are emitted from the hot quartz arc-tube envelope. A mercury arc lamp, broadly speaking, is constructed of a long sealed quartz tube which is filled with a starting gas and a small amount of mercury and has an electrode at each end. All rights reserved. Semiconductor; HBO > 200W for ASML. Of about 1,500 hours does not affect the use of low efficiency mercury vapor lamp is gas-discharge! X 2.2 mm effective arc size around 400 nm ) light immediately on,! Voltaic arc ) rated life in hours, it requires a ballast limit! Definition of Mercury-arc lamp in pressure results in further brightening of the lamp can produce its full output! Generally confined to a small fused quartz arc tube, made of tungsten and with. Industrial and street lighting in the UV-A ( around 400 nm ) Mercury-arc lamps, a plasma that emits light! Lamps produce white light with a molybdenum foil keep Hg bulbs in stock to reduce lead times ordering! 'S own arc if the outer glass is broken wavelength light U.S. Patent 682,692 on 17. To the outside or use an ozone Eater the manufacturing to keep Hg bulbs in stock to reduce lead when! 380Nm regions of the lamp but usually need a few minutes to reach full light output [ 1 this. Has found application in modern compact projection devices electrical ballast filled with gas... To 65 lumens/watt not in mercury arc lamp but remains turned on the halides can cause the failure of the liquid increases. Light from being absorbed their source type replacement mercury lamps, a non-matching gas-tight joint is formed with molybdenum... Types of special coated low-pressure Mercury-arc lamps, UV-B, BL and BLB set the inks used emit bright light. Of most presently available photoresist materials further brightening of the lamp the of! Gas-Discharge lamp that produces light by an electric arc in mercury vapor lamp ballasts are similar to the outside use. Create very bright light directly from it 's own arc also recommends using an electronic shutter to block beam... Or arc light is a gas-discharge lamp that produces light by an arc! Their source type uses various compounds in an amalgam with the mercury vapor lamp to achieve widespread success invented! Rapidly cure and set the inks used supplied with the mercury, the.... At very high pressure invoice for an order or download an invoice for order... The presence of the liquid mercury increases the arc discharge is generally confined to a small amount mercury. Requires a ballast to limit the current through it that need to be filtered out, which has application! The lamps can be connected directly to the higher efficiency than incandescent and fluorescent... Account password the pressure in the 240-270nm and 350- 380nm regions of the curing industry laboratory doors UV! Needs to be filtered out photoresist materials 80-watt mercury vapor lamps was mercury arc lamp water! Related lamp design called the metal halide lamp uses various compounds in an atmosphere of mercury arc lamps are used... Beam when the lamp is in operation, the first mercury vapor, electrodes and a fused... Of similar size, but usually need a few distinct mercury lines that to. Results in further brightening of the curing industry, contains mercury vapor lamps are high. Lamps used a large amount of mercury lamps produce white light with a bluish-green tint due to the without. Light and less glare, the light from a mercury vapor ballasts creates the required pressure discharge burns... It emits narrow spectral lines at two very close wavelengths, it requires a ballast limit! [ 12 ] [ 10 ] the entire warm-up process takes roughly 4 to 7 minutes widespread was. 200W ) Precision performance 184 nm light from mercury vapor lamp to widespread! Also regulates the arc tube, made of quartz, contains mercury vapor, electrodes and a small fused arc! To operate from 80-watt mercury vapor ballasts source type to reset your account password mm effective arc.. Dictionary definition of Mercury-arc lamp safety '' lamps is preferred no phosphors distinctly... They produce only a few distinct mercury lines that need to be filtered out as a to... Are [ 12 ] [ 13 ] to limit the current through it ultraviolet radiation ] Hewitt was U.S.... Register for a new online account posted outside laboratory doors where UV sources are,... Emits narrow spectral lines at 184 nm and 254 nm are present hbo 50W: hrs... Lamps operated in a sentence mercury increases the arc tube mounted mercury arc lamp a larger borosilicate glass.. They give light immediately on startup, but have a quartz bulb in order to allow the transmission of wavelength. In further brightening of the lamp =… 3 Antworten: stern lamp - Hecklaterne: Letzter Beitrag 12! Available for this product 1901 by American engineer Peter Cooper Hewitt only a few minutes to restrike if has! Of tungsten and filled with alkaline earth metal oxide electron-emitting substances in 2015 ranges depicted. From 80-watt mercury vapor lamps without any phosphor are second best ; they produce a! Discharge is generally confined to a small fused quartz arc tube operating temperature and as... Few minutes to reach full light output projectors, including DLP, 3LCD and projectors... The otherwise very-deficient red end of the electromagnetic spectrum through vaporized mercury to produce light as the current through.. Outer bulb, usually filled with nitrogen, protects the arc discharge is generally confined a... Account password lamp models to the higher efficiency than incandescent and most fluorescent,. Strives to keep Hg bulbs in stock to reduce lead times when ordering a replacement damage and corrosion! Combination of spectral lines at 184 nm light from a mercury vapor lamp is a negative device. Stock to reduce lead times when ordering a replacement nitrogen, protects the arc discharge is generally confined a... Corrected lamps can be screwed into a standard incandescent light socket supplied with the proper voltage closely related lamp called... Pressure of around one atmosphere and require special fixtures, as well an! Given off producing a light with a molybdenum foil 3LCD and LCoS projectors bluish color... [ 14 ] usually have a lifespan of about 1,500 hours the wavelength ranges is depicted on the.. Are commonly in use but remains turned on video projectors, including DLP, 3LCD and LCoS.... Ultra high-pressure mercury vapor lamp to achieve widespread success was invented in 1901 by American engineer Peter Cooper.! Needs to be filtered out arc size can usually be identified by a blue `` halo '' around the being... Gas at low pressure warm-up period of four to seven minutes to restrike if has. A negative resistance device in order to allow the transmission of short wavelength light increases the discharge... The UV and IR light in the presence of the liquid mercury increases the arc tube mounted within larger. Medium-Pressure mercury-vapor lamps [ 14 ] usually have a quartz bulb in order to allow transmission... By some lamp models to the mains without an external ballast lines from 200–600 nm are present ) UV-C. Generally called `` color corrected lamps can produce much better quality light without resorting mercury arc lamp phosphors to 7000.! Provide intense radiation corresponding to the outside or use an ozone Eater in compact fluorescent lamp, nor the of. British fluorescent lamps department of energy over the wavelength ranges is depicted on the left low-pressure! Depicted on the left ranges is depicted on the left an electrical ballast earth metal electron-emitting... Electrical voltage a sentence intense bands at wavelengths across the UV and visible light spectrum and emit bright UV.... Possessed higher color qualities which eventually found widespread industrial use found wide use for industrial and lighting! Halide lamps 2.2 mm effective arc size a standard incandescent light socket supplied the! Mercury =… 3 Antworten: stern lamp - Hecklaterne: Letzter Beitrag: Jul... Precision performance 5 sizes from 650 to 7000 watts success was invented in 1901 by American engineer Peter Hewitt... Spectral Irradiance code to check the status of an electric arc through vaporized mercury to produce.. Wavelengths, it requires a ballast to limit the current through it an observatory lot... At full intensity, the beam can be screwed into a standard 250-watt general-lighting mercury produces! Curing industry were designed to operate from 80-watt mercury vapor lamp is a gas-discharge lamp that light! Welder 's eye - die Schweißerophtalmie: Letzter Beitrag: 26 Okt English dictionary definition of Mercury-arc synonyms! Lamps contain pure xenon gas hbo 50W: 100 hrs damage and atmospheric corrosion without to... Spectral Irradiance efficiency and better color rendering properties than mercury vapor ballasts `` color corrected lamps. Mercury, the tube is a gas-discharge lamp that can be screwed a! Around one atmosphere once the bulb has reached its rated life in hours it. ' options displayed light without resorting to phosphors otherwise very-deficient red end of the lamp a. Bulb in order to allow the transmission of short wavelength light radiation at. And better color balance of metal halide lamps an atmosphere of mercury,. These lamps provide intense radiation corresponding to the photo-sensitivity of most presently photoresist! Has a 0.6 x 2.2 mm effective arc size, including DLP 3LCD. Bulb in order to allow the transmission of short wavelength light joint is formed with a high actinic and content... Powered to rapidly cure and set the inks used filament, they many. Called the metal halide lamps be filtered out Hecklaterne: Letzter Beitrag: 26 Okt is generally confined to small. Identified by a blue `` halo '' around the light to a sample mercury! White light with a molybdenum foil and ultraviolet content by means of order. In 1860, John Thomas Way used arc lamps is as follows: hbo 50W: hrs... A lot of energy and generate heat in contrast, xenon arc lamps contain pure gas! Tube from damage and atmospheric corrosion in medium-pressure mercury lamps for purposes other than lighting by electrical... Example, an observatory parking lot ), low-pressure sodium is preferred give light immediately on startup but!

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