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.  "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 It was widely used starting in the 1870s for street and large building lighting until it was superseded by the incandescent lightin the early 20th century.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.  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. , 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. , 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. 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