Electrodeless lighting electrical contractor magazine. Suitable cells may be constructed from plexiglass tubing, 1 in. Pinaacle instruments require the purchase of an edl driver assembly, part number 03030997, for each of the lamp positions to be used electrodeless discharge lamps for greater brightness edls are typically much brighter and, in some cases, provide better sensitivity than comparable hcls. If specific atomic lines are desired, a small amount of the desired element is introduced in the discharge. The spectral characteristics of the electrodeless lamp resemble more those of highpressure mercury lamps. The 185 nm vacuum uv vuv intensity of the mwuvl amounted to 12% of the total uv output, about 1. These electrodeless discharge lamps are preferred for certain volatile elements. A novel electrodeless discharge lamp coated with titania oxide anatase and placed in a microwave field directly in a bulk of suspension was used to generate uvvis radiation. May 21, 1996 it should be appreciated that, according to the foregoing electrodeless discharge lamp, the annular or continuous stringshaped preliminary discharge can be generated with the application of the high frequency voltage to the single type auxiliary electrode, and its shift to the electrodeless discharge d a is rendered easier. Lumina hollow cathode and electrodeless discharge lamps. While experimenting with highfrequency current, inventor nikola tesla developed an electrodeless lamp, but the concept remained largely unexplored for the next century except as a novelty lamp in the 1980s. When the power goes through the high frequency power supply generator, it creates a 2. Temperature of an electrodeless discharge lamp and determination of the oscillator strength for the i2p32 183. Radiation sources atomic absorption spectroscopy learning.
Apr 09, 2020 his lamp looked like a large lightbulb and had strange greenish phosphors. Every genuine perkinelmer lumina lamp is designed for use with and tested on our spectrometers to assure compatibility and the highest performance. New patent cd for electrodeless ultraviolet discharge fluid remediation. In operation the gas is ionized and free electrons, accelerated by the electrical field. Abstract electrodeless discharge lamps have several advantages compared to lamps containing electrodes, including longer life, improved lumen maintenance, lamp efficacy, flexibility of lamp design, the use of chemical doses that would interact. In principle, electrodeless lamps can be excited by three discharge mechanisms, i. Safe driving from start to finish with bright flickerfree light and extremely. Atomic spectra from rf electrodeless discharge sources for. The internal electrodeless lamp or induction lamp is a gas discharge lamp in which an electric. Us20020047615a1 electrodeless discharge lamp system. Dec 11, 1990 electrodeless lowpressure discharge lamp having a glass lamp vessel 1 which is sealed in a gaastight manner and which is filled with at least a metal vapor and a rare gas, said lamp having a first winding 6 which is connected to a highfrequency electric power supply unit and which generates an electric discharge in the lamp vessel 1. Standard spectrophotometer cells 10 cm long with quartz end windows may be used. Perkinelmer offers a full range of singleelement and multielement hollow cathode lamps and high intensity electrodeless discharge lamps for those elements for which they are more effective. Electrodeless lamp article about electrodeless lamp by the.
The bulb contains a small quantity of the element of interest. System 2 electrodeless discharge lamp for the detection of elemental cadmium cd. His lamp looked like a large lightbulb and had strange greenish phosphors. Photodegradation of rhodamine b dye using a microwave. The lamp gives over three times as much uv radiation as the conventional electrode lamp. Fluorescent lamps are low pressure discharges, operating at an electron temperature of 12ev. Microwave discharge electrodeless lamps mdel part vii. Hfedls have been used in various scientific devices such as emission and absorption spectrometers, spectrometers for refractive index measurements, frequency. The photodegradation of organic dye rhodamine b rhb in an aqueous solution was studied using a microwave electrodeless uv lamp mwuvl. However, only inductive discharges have been successfully exploited as a commercial lamp for general lighting purposes. High frequency hf discharge electrodeless lamp hfdel, a typical uv light source, has been invented over 100 years and started to apply into the photolysis of organic compounds in solution and the irradiation of gases since 1970s 6. Perkinelmer n3050657 lead system 2 electrodeless discharge lamp, 2 o. An arrangement for adjusting the intensity of an electrodeless discharge lamp is described. The luminous efficacy of the endura is comparable to that of fluorescent lamps.
Highfrequency electrodeless discharge lamps hfedls are widely used as high intensity sources of narrow spectral lines, covering the spectrum from the vacuum ultraviolet to the infrared. Electrodeless lamp lighting systems utilizing the sulfur based bulb type developed by fusion lighting, inc. Electrodeless discharge definition is a discharge produced in the neighborhood of a highfrequency alternating current under certain conditions through a gas contained in a closed tube without electrodes. It may come back into the public eye as it is improved.
Electrodeless lowpressure discharge lamp having a glass lamp vessel 1 which is sealed in a gaastight manner and which is filled with at least a metal vapor and a rare gas, said lamp having a first winding 6 which is connected to a highfrequency electric power supply unit and which generates an electric discharge in the lamp vessel 1, one of the supply wires of the first winding being. These are sealed quartz tubes filled with inert gas at low pressure, much like hcl. Electrodeless discharge definition of electrodeless. Perkinelmer n3050657 lead system 2 electrodeless discharge. An electrodeless discharge lamp includes a discharge gas sealed in a lamp tube. The electrode less discharge lamp uses an induction coil or energycoupling antenna without electrodes, which use the application of lowpressure gas discharge.
The pfc acts as a controlled power source and provides mid and longterm stability to the system, while the stability of the current through the lamp is. Inductive lighting electrodeless lamp the talk page discussion reveals that electrodeless lampis the correct common title for this page the preceding unsigned comment was added by gerben49 talk contribs 30 june 2005, 21. The induction lamp, a new source of visible and ultraviolet radiation. An electrodeless discharge borosilicate glass lamp. A new flat dark discharge lamp for backlight applications based on electron. Dt is a discharge tube containing a rarefied gas, c is the capacitor of an oscillatory circuit, l is the inductance coil, and g is an electromagnetic oscillation generator. Electrodeless discharge lamp including impedance matching and. This is in contrast to a typical gas discharge lamp that uses internal electrodes connected to the power supply by conductors that pass through the lamp envelope.
A novel environmental risk free microwave discharge electrodeless lamp mdel in advanced oxidation processes. Highfrequency electrodeless discharge lamps hfedls are widely used as sources of intensive atomic spectral lines in atomic emission and absorption spectroscopy 1. This is in contrast to a typical gas discharge lamp that uses internal electrodes connected to the power supply by conductors that pass. This paper presents the design, control strategy and experimental results of a twostep, power factor correction stage pfc and resonant inverter ri, electronic ballast proposal to supply 150 w electrodeless fluorescent lamps efl. Lamps are presented in the order of chronological development. How does it work the high frequency electrodeless discharge lamp is made of three parts.
Introduction the electric discharge lamp is one of the most important plasma devices today. New patent cd for electrodeless ultraviolet discharge. A lossfree resistorbased versatile ballast for discharge. They offer better precision and lower detection limits for analyses that are noisy due to weak hollow cathode emission. But the high price of the technology remained a barrier to production. Atomic absorption lamps perkinelmer has over 40 years of expertise designing and manufacturing lamps. Pdf a novel environmental riskfree microwave discharge. Electrodeless lamp lighting systems utilizing the sulfur based bulb type developed by. The spectral output of the electrodeless discharge mercury lamp is known. Note multielement lamps are not designed to be used with furnace systems. This function is provided by a dimmer control unit which may be in an analog or digital form and may respond to a control signal provided by a potentiometer, a. A novel mercury free dewarlike doublewalled structure microwave discharge thermallyinsulated electrodeless lamp mdtiel was fabricated and its performance evaluated using the photoisomerization of transurocanic acid transua in aqueous media as a test process driven by the emitted uv light when ign. The discharge gas includes a halide of rare earth metal.
It is a further object of the invention to provide a mercury free electrodeless high intensity discharge lamp having a boron sulfidebased fill including a small. Highfrequency electrodeless discharge lamps for atomic. Induction high bay fixture,electrodeless lamp,lvd flood. Singleuse syringes 10 ml, luer approach, individually sterile packed, 100 pcpak. The internal electrodeless lamp or induction lamp is a gas discharge lamp in which an electric or magnetic field transfers the power required to generate light from outside the lamp envelope to the gas inside. Electrodeless lamp article about electrodeless lamp by. Other advantages of the electronic ballasts are that the light is flickerfree and there is the opportunity of. A device that generates light by means of an internal electrical discharge between electrodes in a gas. From an electrical point of view, the lamp can be thought of as a transformer, where the coil acts as the primary and the plasma acts as the secondary. N3050675 tin sn electrodeless discharge lamp analytics.
Electrodeless discharge one of the kinds of ac electrical discharges in which energy is supplied without a contact and the circuit of the discharge current is completed. Low pressure mercuryargon electrodeless fluorescent lamp. This paper presents a versatile ballast for discharge lamps, whose operation is based on the notion of a loss free resistor lfr. Electrodeless lowpressure discharge lamp free patents online. If the efficiency of discharge lamps could be increased by 1%, it would result in a saving of 10 9 kwh per year worldwide.
This paper presents a versatile ballast for discharge lamps, whose operation is based on the notion of a lossfree resistor lfr. In the 1980s the subject of a lowwattage incandescent retrofit lamp was being extensively researched in the labs of philips and thorn lighting, both of whom created advanced prototypes that came very close to a market launch. An auxiliary electrode is disposed on or adjacent to an outer periphery wall of the lamp tube such that the auxiliary electrode is capacitively coupled to an interior space of the lamp tube. Induction high bay fixture,electrodeless lamp,lvd flood light. Request pdf mercuryfree electrodeless discharge lamp. Perkinelmer system 2 edls consist of the element or a salt of the element sealed in a quartz bulb containing an inert gas atmosphere. It is a further object of the invention to provide a mercuryfree electrodeless high intensity discharge lamp having a boron sulfidebased fill including a small. Electrodeless discharge article about electrodeless. Any multirange variablespeed recorder that is compatibl e with the uv detection system is suitable. Discharge lamp definition of discharge lamp by merriam. Discharge lamp definition of discharge lamp by the free. Northrop grumman electronic sensors and systems division essd and fusion lighting, inc. Electrodeless discharge lamps edls electrodeless discharge lamp edls are line sources that provide radiant energy that has a greater intensity than hcl.
A lossfree resistorbased versatile ballast for discharge lamps. A qc team with more than 20 professional and technical personnel. An electrodeless discharge lamp system includes an excitation coil placed in proximity of the electrodeless discharge lamp, a resonance circuit for supplying appropriate power to the excitation coil, and a high frequency power source driver and wherein, the combined output is achieved by operating the parallel connected power sources in synchronization or approximately in synchronization with. A novel mercuryfree dewarlike doublewalled structure microwave discharge thermallyinsulated electrodeless lamp mdtiel was fabricated and its performance evaluated using the photoisomerization of transurocanic acid transua in aqueous media as a test process driven by the emitted uv light when ignited with microwave radiation. When an rf field of sufficient power is applied, the. Effect of xenon pressure and plasma parameters on luminance since there is much concern about. A novel environmental riskfree microwave discharge electrodeless lamp mdel in advanced oxidation processes. Abstract electrodeless discharge lamps have several advantages compared to lamps containing electrodes, including longer life, improved lumen maintenance, lamp efficacy, flexibility of lamp design, the use of chemical doses that would interact with electrodes, and improved electrical control. An acidic condition was preferred for the degradation of rhb. The uv emission can stimulate phosphors coated on the surface of the bulb. External core lamps are basically fluorescent lamps with magnetic cores wrapped around a part of the discharge tube. In one embodiment the highfrequency signal delivered to the induction coil is interrupted during a predetermined portion of a full duty cycle. The first practical electrodeless lamp appeared a short time later, and the technology continues to gain in popularity today due to its energy and maintenance advantages.
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