CA2068574A1 - Irradiation device having a high-power radiator - Google Patents
Irradiation device having a high-power radiatorInfo
- Publication number
- CA2068574A1 CA2068574A1 CA 2068574 CA2068574A CA2068574A1 CA 2068574 A1 CA2068574 A1 CA 2068574A1 CA 2068574 CA2068574 CA 2068574 CA 2068574 A CA2068574 A CA 2068574A CA 2068574 A1 CA2068574 A1 CA 2068574A1
- Authority
- CA
- Canada
- Prior art keywords
- radiator
- radiation
- coolant
- walls
- bath
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/52—Cooling arrangements; Heating arrangements; Means for circulating gas or vapour within the discharge space
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
- H01J65/04—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels
- H01J65/042—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field
- H01J65/046—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field the field being produced by using capacitive means around the vessel
Abstract
ABSTRACT OF THE DISCLOSURE
In order to improve the cooling of an irradia-tion device having a UV high-power radiator, the latter is entirely immersed in a coolant bath (10), the bath and at least one wall (13) of the bath being trans-parent to the generated UV radiation.
In order to improve the cooling of an irradia-tion device having a UV high-power radiator, the latter is entirely immersed in a coolant bath (10), the bath and at least one wall (13) of the bath being trans-parent to the generated UV radiation.
Description
206857~
28.5.91/He TITLE OF THE INVENTION
Irradiation device having a high-power radiator BACKGROUND OF THE INVENTION
S Field of the invention The invention relates to an irradiation device having a high-power radiator, especially for ultra-violet light, having a discharge space, which is filled with filling gas emitting radiation under dischar~e conditions and the walls of which are formed by a first and a second dielectric, which is provided, on its sur-faces facing away from the discharge space, with first metallic lattice-type or grid-type and second elec-trodes, having an alternating current source, connected to the first and second electrodes, to feed the discharge.
In this case, the invention makes reference to prior art as is disclosed, for example, in EP-A 0,254,111.
Discussion of Backaround The indu~trial application of photochemical proce88e8 i8 to a great extent dependent upon the availability of suitable W sources. The conventional W radiators give low to medium W intensities at certain discrete wavelengths, such as, for example, low-pressure mercury lamps at 185 nm and especially at 254 nm. Really high W power levels are obtained only from high-pressure lamps (Xe, Hg), which, however, then distribute their radiation over a greater wavelength range. The new excimer lasers have made some new wavelengths available for photochemical fundamental experiments, but at the present time, for reasons of cost, are suitable for an industrial process really only in exceptional cases.
A novel excimer radiator is described in the initially mentioned EP Patent Application, or also in the conference publication "Novel UV and VUV Excimer . - . ~, .: . . . .
2068~
Radiators~ by U. Kogelschatz and B. Eliasson, dis-tributed at the 10th lecture conference of the ~ssociation of German Chemists, Photochemistry Technical Group, in WUrzburg (FRG) on 18-20 November 1387. This novel type of radiator is based on the principle that it is also possible to generate excimer radiation in silent electrical discharges, a type of discharge which is employed in the production of ozone on an industrial scale. In the filaments of current, which exist only for a short time (~ 1 microsecond), of this discharge, rare-gas atoms are excited by electron collision, which atoms further react to form excited complexes o~ molecules (excimers). These excimers have a life of only a few 100 nanoseconds, and, upon disintegration, give up their binding energy in the form of W radiation.
Even as far as the power supply, the construc-tion of such an excimer radiator corresponds to a large extent to that of a conventional ozone generator, with the essential difference that at least one of the elec-trodes and/or dielectric layers bounding the discharge space transmits the generated radiation. At least one of these electrodes might shade off the qenerated radiation only to a slight extent. A further require-ment imposed upon the radiator i~ that, even at highpower densities, it too should radiate as little heat as possible. This i6 particularly important in applications in the graphics industry, where printing inks frequently have to be hardened on a heat-sensitive background.
SUMMARY OF THE INVENTION
Proceeding from the prior art, the object of the invention is to provide an irradiation device 3~ having a radiator, especially for W or V W radiation, the electrodes of which shade off the radiation as little as possible and which radiator can optimally be cooled.
.. . . .
.. . .. . . .
206857~
In order to achieve this object, it is provided according to the invention that the radiator is immersed in a coolant bath, in such a manner that the coolant flows around the first dielectric and at least the first electrodes, and that at least one wall of the coolant bath and the coolant itself transmit the generated radiation.
An irradiation device constructed in this manner satisfies all requirements encountered in practice:
- The invention permits the construction of an entirely cold radiator; this is especially impor-tant in connection with the hardening of printing inks on a heat-sensitive background.
1~ - The outer electrodes can be of simple construction - it is sufficient to provide a few metal strips or metal wires which extend in the longitudinal direction of the radiator and which do not neces~arily need to rest on the outer dielectric.
In this manner, the dielectric~ can readily be exchanged.
- The coolant, pre~erably water, prevent~ external dischar~es between the outer electrodes and outer wall of the radiator. This prevents the formation of ozone.
- As no further external discharges can develop, metal deposition by sputtering is also prevented, i.e. the W transmittance is not impaired, even after a relatively long period of operation.
30 - In the event that the respective application per-mits operation only with a coolant bath sealed off on all sides and the W radiation can leave said bath only through a window, the latter can readily be cleaned or exchanged. This is significant for the use of the radiator in the graphics industry, where it is frequently the case that ink residues have to be removed.
- The invention permits not only a strictly modular ;; .: ~. ~ ... . . . .
2068~74 construction, but also the integration of a plurality of radiators within the same bath.
A ~irst advantageous development of the subject of the invention comprises providing the walls of the coolant bath with a layer which reflects the W
radiation well, or, in the case of walls composed of aluminum or an aluminum alloy, polishing said wall~. A
further variant comprise3 providing a part of the outer ~urface of the outer dielectric tube with a W-reflecting layer. Yet a further variant provideQ theincorporation, in the coolant bath, of a separate reflector which is designed so that a considerable part of the W radiation generated by the radiator leaves the bath without said radiation having to pass the actual radiator once again.
In all these variants, the coolant bath can also be utilized for the cooling of the electrical and electronic components of the current source for feedin~
the radiator, e.g. in that the parts to b~ cooled are mounted directly on the outer walls.
Particular refinements of the invention and the further advantage~ attainable thereby are explained in gre~ter detail hereinbelow with reference to the drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
A more complete appreciation of the invention and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawing, which shows embodiments of a high-power irradiation device in a highly simplified form, and wherein:
Fig. 1 shows an irradiation device having a W
cylinder radiator which is immersed in a coolant bath, and in which radiator the W
radiation can penetrate to the exterior through a wlndow;
. ~ . . .. . . . . . ......... . .
.;.. ; .......... . . . . . .
2068~ 7~
Fiq. 2 shows a longitudinal section through the device according to Fig. 1, along the line AA therein;
~ig. 3 shows a modification of the device according to Fig. 1, having a separate reflector in the 5coolant bath.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring now to the drawings, wherein like reference numerals designate identical or corresponding parts throughout the several views, in Figures 1 and 2 there is presented a diagrammatic representation of an irradiation device which comprises a W high-power radiator having an outer dielectric tube 1, e.g. of quartz glass, an inner dielectric tube 2, which i8 dis-posed concentrically thereto and the inner wall ofwhich is provided with an inner electrode 3. The annular space between the two tubes 1 and 2 forms the discharge space 4 of the radiator. The inner tube 2 is inserted in a ga~-tight manner into the outer tube 1, which was filled, in advance, with a ga~ or gas mixture which, under the influence of silent electrical dis-charges, emits W or V W radiation. The outer electrode 5 employed is a wide-mesh metal ~rid, or the latter consists of individual metal wires or metal strip~
which extend in the longitudinal direction of the tube, which grid e~tends over approximately the upper half-circumference of the outer tube 1. In the case of a strip-type electrode arrangement, the individual strips are connected to one another at a plurality of axially distributed points. ~oth the outer electrode 5 and also the outer dielectric tube 1 transmit the generated W
radiation. The lower circumference of the tube 1 is provided with a reflector 6. This can, for example, be formed by a vapor-deposited aluminum layer. This reflector is at the same electrical potential as the outer electrode 5.
The radiator which has just been described is immersed in a coolant bath 10, which is bounded by 2~6~37~
metal walls 7, 8, 9, 17 and 18 and through which, via coolant inlet 11 and coolant outlet 12 respectively, coolant, preferably distilled water, flows. A
UV-transmitting window 13, e.g. of ~uartz glass, is provided in the upper part.
Another possibility for directing the created radiation in a preferred manner through the window 13 into the outer space comprises mirror-coating the internal surface of the walls 7, 8 and 9; in the case of aluminum walls, this can take place by polishing the surfaces. For the mirror-coating of the vessel walls, a preferred embodiment optionally provides for the insertion of a separate reflector 14 into the floor portion of the bath, which separate reflector exhibits a multiplicity of perforations 15 and is at the same electrical potential as the vessel walls. The perfora-tions permit an adequate coolant flow from the inlet 11 to the outlet 12. The reflector 14 i8 formed 80 that it reflects a major part of the W light emitted downwards by the radiator, without the radiation having to pass the dielectric tube or indeed the two dielectric tubes 1 and 2 once again. The cross-section of the reflector 14 can be considered a~ being composed of two parabolic sections.
The electrodes 3 and 5 are passed to the two terminals of an alternating current source 16. The alternating current source 16 corresponds, fundamentally, to those which are used for supplying ozone generators. Typically, it delivers an adjustable alternating voltage in the order of magnitude of several 100 volts to 20,000 volts at frequencies within the range of industrial alternating current, reaching up to a few thousand kHz - depending upon the electrode geometry, the pressure in the discharge space 4 and the composition of the filling gas.
The filling gas is, for example, mercury, a rare gas, rare gas/metal vapor mixture, rare gas/halogen mixture, possibly with the use of an 2068~7~
additional further rare gas, preferably Ar, He or Ne, as buffer gas.
Depending upon the desired spectral composition of the radiation, it is in this case possible to use a substance/mixture of substances according to the following table:
Fillina aas Radiation Helium 60 - 100 nm Neon 80 - 90 nm Argon 107 - 165 nm Argon + Fluorine 180 - 200 nm Argon + Chlorine 165 - 190 nm Argon + Krypton + Chlorine 165 - 190, 200 - 240 nm Xenon 160 - 190 nm Nitrogen 337 - 415 nm Krypton 124, 140 - 160 nm Krypton + Fluorine 240 - 2S5 nm Krypton + Chlorine 200 - 240 nm Mercury 185,254,320-370,390-420 nm Selenium . 196, 204, 206 nm Deuterium 150 - 250 nm Xenon + Fluorine 340 - 360 nm, 400 - 550 nm Xenon + Chlorine 300 - 320 nm In addition to the above, a whole series of further filling gases may be considered:
- A rare gas (Ar, He, Kr, Ne, Xe) or Hg with a gas or vapor consisting of F2, I2, Br2, C12 or a com-pound which in the discharge splits off one or more F, I, Br or Cl atoms;
- a rare gas (Ar, He, Kr, Ne, Xe) or Hg with 2 or a compound which in the discharge splits off one or more O atoms;
- a rare gas (Ar, He, Kr, Ne, Xe) with Hg.
In the silent electrical discharge which is formed, the electron energy distribution can be optimally set by the thickness of the dielectrics 1 and 2 and their pressure and/or temperature properties in .. ~ " ., , .. . , .. . .. , .. . .. . .. ~
~ - 8 - 2a68~74 the discharge space 4.
Upon app].ication of an alternating voltage between the electrodes 3 and 5, a multiplicity of dis-charge channels (partial discharges) is formed in the discharge space 4. These enter into interaction with the atoms/molecules of the filling gas, which leads, in the final analysis, to the W or V W radiation.
Obviously, numerous modifications and varia-tions of the present invention are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims, the in-vention may be practiced otherwise than as specifically described herein.
28.5.91/He TITLE OF THE INVENTION
Irradiation device having a high-power radiator BACKGROUND OF THE INVENTION
S Field of the invention The invention relates to an irradiation device having a high-power radiator, especially for ultra-violet light, having a discharge space, which is filled with filling gas emitting radiation under dischar~e conditions and the walls of which are formed by a first and a second dielectric, which is provided, on its sur-faces facing away from the discharge space, with first metallic lattice-type or grid-type and second elec-trodes, having an alternating current source, connected to the first and second electrodes, to feed the discharge.
In this case, the invention makes reference to prior art as is disclosed, for example, in EP-A 0,254,111.
Discussion of Backaround The indu~trial application of photochemical proce88e8 i8 to a great extent dependent upon the availability of suitable W sources. The conventional W radiators give low to medium W intensities at certain discrete wavelengths, such as, for example, low-pressure mercury lamps at 185 nm and especially at 254 nm. Really high W power levels are obtained only from high-pressure lamps (Xe, Hg), which, however, then distribute their radiation over a greater wavelength range. The new excimer lasers have made some new wavelengths available for photochemical fundamental experiments, but at the present time, for reasons of cost, are suitable for an industrial process really only in exceptional cases.
A novel excimer radiator is described in the initially mentioned EP Patent Application, or also in the conference publication "Novel UV and VUV Excimer . - . ~, .: . . . .
2068~
Radiators~ by U. Kogelschatz and B. Eliasson, dis-tributed at the 10th lecture conference of the ~ssociation of German Chemists, Photochemistry Technical Group, in WUrzburg (FRG) on 18-20 November 1387. This novel type of radiator is based on the principle that it is also possible to generate excimer radiation in silent electrical discharges, a type of discharge which is employed in the production of ozone on an industrial scale. In the filaments of current, which exist only for a short time (~ 1 microsecond), of this discharge, rare-gas atoms are excited by electron collision, which atoms further react to form excited complexes o~ molecules (excimers). These excimers have a life of only a few 100 nanoseconds, and, upon disintegration, give up their binding energy in the form of W radiation.
Even as far as the power supply, the construc-tion of such an excimer radiator corresponds to a large extent to that of a conventional ozone generator, with the essential difference that at least one of the elec-trodes and/or dielectric layers bounding the discharge space transmits the generated radiation. At least one of these electrodes might shade off the qenerated radiation only to a slight extent. A further require-ment imposed upon the radiator i~ that, even at highpower densities, it too should radiate as little heat as possible. This i6 particularly important in applications in the graphics industry, where printing inks frequently have to be hardened on a heat-sensitive background.
SUMMARY OF THE INVENTION
Proceeding from the prior art, the object of the invention is to provide an irradiation device 3~ having a radiator, especially for W or V W radiation, the electrodes of which shade off the radiation as little as possible and which radiator can optimally be cooled.
.. . . .
.. . .. . . .
206857~
In order to achieve this object, it is provided according to the invention that the radiator is immersed in a coolant bath, in such a manner that the coolant flows around the first dielectric and at least the first electrodes, and that at least one wall of the coolant bath and the coolant itself transmit the generated radiation.
An irradiation device constructed in this manner satisfies all requirements encountered in practice:
- The invention permits the construction of an entirely cold radiator; this is especially impor-tant in connection with the hardening of printing inks on a heat-sensitive background.
1~ - The outer electrodes can be of simple construction - it is sufficient to provide a few metal strips or metal wires which extend in the longitudinal direction of the radiator and which do not neces~arily need to rest on the outer dielectric.
In this manner, the dielectric~ can readily be exchanged.
- The coolant, pre~erably water, prevent~ external dischar~es between the outer electrodes and outer wall of the radiator. This prevents the formation of ozone.
- As no further external discharges can develop, metal deposition by sputtering is also prevented, i.e. the W transmittance is not impaired, even after a relatively long period of operation.
30 - In the event that the respective application per-mits operation only with a coolant bath sealed off on all sides and the W radiation can leave said bath only through a window, the latter can readily be cleaned or exchanged. This is significant for the use of the radiator in the graphics industry, where it is frequently the case that ink residues have to be removed.
- The invention permits not only a strictly modular ;; .: ~. ~ ... . . . .
2068~74 construction, but also the integration of a plurality of radiators within the same bath.
A ~irst advantageous development of the subject of the invention comprises providing the walls of the coolant bath with a layer which reflects the W
radiation well, or, in the case of walls composed of aluminum or an aluminum alloy, polishing said wall~. A
further variant comprise3 providing a part of the outer ~urface of the outer dielectric tube with a W-reflecting layer. Yet a further variant provideQ theincorporation, in the coolant bath, of a separate reflector which is designed so that a considerable part of the W radiation generated by the radiator leaves the bath without said radiation having to pass the actual radiator once again.
In all these variants, the coolant bath can also be utilized for the cooling of the electrical and electronic components of the current source for feedin~
the radiator, e.g. in that the parts to b~ cooled are mounted directly on the outer walls.
Particular refinements of the invention and the further advantage~ attainable thereby are explained in gre~ter detail hereinbelow with reference to the drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
A more complete appreciation of the invention and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawing, which shows embodiments of a high-power irradiation device in a highly simplified form, and wherein:
Fig. 1 shows an irradiation device having a W
cylinder radiator which is immersed in a coolant bath, and in which radiator the W
radiation can penetrate to the exterior through a wlndow;
. ~ . . .. . . . . . ......... . .
.;.. ; .......... . . . . . .
2068~ 7~
Fiq. 2 shows a longitudinal section through the device according to Fig. 1, along the line AA therein;
~ig. 3 shows a modification of the device according to Fig. 1, having a separate reflector in the 5coolant bath.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring now to the drawings, wherein like reference numerals designate identical or corresponding parts throughout the several views, in Figures 1 and 2 there is presented a diagrammatic representation of an irradiation device which comprises a W high-power radiator having an outer dielectric tube 1, e.g. of quartz glass, an inner dielectric tube 2, which i8 dis-posed concentrically thereto and the inner wall ofwhich is provided with an inner electrode 3. The annular space between the two tubes 1 and 2 forms the discharge space 4 of the radiator. The inner tube 2 is inserted in a ga~-tight manner into the outer tube 1, which was filled, in advance, with a ga~ or gas mixture which, under the influence of silent electrical dis-charges, emits W or V W radiation. The outer electrode 5 employed is a wide-mesh metal ~rid, or the latter consists of individual metal wires or metal strip~
which extend in the longitudinal direction of the tube, which grid e~tends over approximately the upper half-circumference of the outer tube 1. In the case of a strip-type electrode arrangement, the individual strips are connected to one another at a plurality of axially distributed points. ~oth the outer electrode 5 and also the outer dielectric tube 1 transmit the generated W
radiation. The lower circumference of the tube 1 is provided with a reflector 6. This can, for example, be formed by a vapor-deposited aluminum layer. This reflector is at the same electrical potential as the outer electrode 5.
The radiator which has just been described is immersed in a coolant bath 10, which is bounded by 2~6~37~
metal walls 7, 8, 9, 17 and 18 and through which, via coolant inlet 11 and coolant outlet 12 respectively, coolant, preferably distilled water, flows. A
UV-transmitting window 13, e.g. of ~uartz glass, is provided in the upper part.
Another possibility for directing the created radiation in a preferred manner through the window 13 into the outer space comprises mirror-coating the internal surface of the walls 7, 8 and 9; in the case of aluminum walls, this can take place by polishing the surfaces. For the mirror-coating of the vessel walls, a preferred embodiment optionally provides for the insertion of a separate reflector 14 into the floor portion of the bath, which separate reflector exhibits a multiplicity of perforations 15 and is at the same electrical potential as the vessel walls. The perfora-tions permit an adequate coolant flow from the inlet 11 to the outlet 12. The reflector 14 i8 formed 80 that it reflects a major part of the W light emitted downwards by the radiator, without the radiation having to pass the dielectric tube or indeed the two dielectric tubes 1 and 2 once again. The cross-section of the reflector 14 can be considered a~ being composed of two parabolic sections.
The electrodes 3 and 5 are passed to the two terminals of an alternating current source 16. The alternating current source 16 corresponds, fundamentally, to those which are used for supplying ozone generators. Typically, it delivers an adjustable alternating voltage in the order of magnitude of several 100 volts to 20,000 volts at frequencies within the range of industrial alternating current, reaching up to a few thousand kHz - depending upon the electrode geometry, the pressure in the discharge space 4 and the composition of the filling gas.
The filling gas is, for example, mercury, a rare gas, rare gas/metal vapor mixture, rare gas/halogen mixture, possibly with the use of an 2068~7~
additional further rare gas, preferably Ar, He or Ne, as buffer gas.
Depending upon the desired spectral composition of the radiation, it is in this case possible to use a substance/mixture of substances according to the following table:
Fillina aas Radiation Helium 60 - 100 nm Neon 80 - 90 nm Argon 107 - 165 nm Argon + Fluorine 180 - 200 nm Argon + Chlorine 165 - 190 nm Argon + Krypton + Chlorine 165 - 190, 200 - 240 nm Xenon 160 - 190 nm Nitrogen 337 - 415 nm Krypton 124, 140 - 160 nm Krypton + Fluorine 240 - 2S5 nm Krypton + Chlorine 200 - 240 nm Mercury 185,254,320-370,390-420 nm Selenium . 196, 204, 206 nm Deuterium 150 - 250 nm Xenon + Fluorine 340 - 360 nm, 400 - 550 nm Xenon + Chlorine 300 - 320 nm In addition to the above, a whole series of further filling gases may be considered:
- A rare gas (Ar, He, Kr, Ne, Xe) or Hg with a gas or vapor consisting of F2, I2, Br2, C12 or a com-pound which in the discharge splits off one or more F, I, Br or Cl atoms;
- a rare gas (Ar, He, Kr, Ne, Xe) or Hg with 2 or a compound which in the discharge splits off one or more O atoms;
- a rare gas (Ar, He, Kr, Ne, Xe) with Hg.
In the silent electrical discharge which is formed, the electron energy distribution can be optimally set by the thickness of the dielectrics 1 and 2 and their pressure and/or temperature properties in .. ~ " ., , .. . , .. . .. , .. . .. . .. ~
~ - 8 - 2a68~74 the discharge space 4.
Upon app].ication of an alternating voltage between the electrodes 3 and 5, a multiplicity of dis-charge channels (partial discharges) is formed in the discharge space 4. These enter into interaction with the atoms/molecules of the filling gas, which leads, in the final analysis, to the W or V W radiation.
Obviously, numerous modifications and varia-tions of the present invention are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims, the in-vention may be practiced otherwise than as specifically described herein.
Claims (5)
1. An irradiation device having a high-power radiator, especially for ultraviolet light, having a discharge space, which is filled with filling gas emitting radiation under discharge conditions and the walls of which are formed by a first and a second dielectric, which is provided, on its surfaces facing away from the discharge space, with first metallic lattice-type or grid-type and second electrodes, having an alternating current source, connected to the first and second electrodes, to feed the discharge, wherein the radiator is immersed in a coolant bath (10), in such a manner that the coolant flows around the first dielectric (1) and at least the first electrodes (5), and wherein at least one wall (13) of the coolant bath (10) and the coolant itself transmit the generated radiation.
2. The high-power radiator as claimed in claim 1, wherein the walls (7, 8, 9) of the coolant bath (10) are provided with a layer which reflects UV radiation well, or, in the case of walls (7, 8, 9) composed of aluminum or an aluminum alloy, said walls are polished.
3. The high-power radiator as claimed in claim 1, wherein a part of the outer surface of the outer dielectric tube (1) is provided with a UV-reflecting layer (6).
4. The high-power radiator as claimed in claim 1 or 2, wherein a separate reflector (14) is incorporated in the coolant bath (10), which separate reflector is designed so that a considerable part of the UV radia-tion generated by the radiator leaves the coolant bath (10) without said radiation having to pass the actual radiator once again.
5. The high-power radiator as claimed in one of claims 1 to 4, wherein the coolant bath (10) can also be utilized for the cooling of the electrical and electronic components of the current source to feed the radiator.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP91108988.6 | 1991-06-01 | ||
| EP19910108988 EP0517929B1 (en) | 1991-06-01 | 1991-06-01 | Irradiation device with a high power radiator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2068574A1 true CA2068574A1 (en) | 1992-12-02 |
Family
ID=8206793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2068574 Abandoned CA2068574A1 (en) | 1991-06-01 | 1992-05-13 | Irradiation device having a high-power radiator |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0517929B1 (en) |
| JP (1) | JP2540415B2 (en) |
| CA (1) | CA2068574A1 (en) |
| DE (1) | DE59104972D1 (en) |
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| DE10112900C1 (en) * | 2001-03-15 | 2002-07-11 | Heraeus Noblelight Gmbh | Excimer UV light source has elongate electrode carrier fixed between tapered end of discharge envelope and socket incorporating current feed |
| JP2004087270A (en) * | 2002-08-26 | 2004-03-18 | Orc Mfg Co Ltd | Excimer lamp and excimer lamp device |
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| WO2005098903A1 (en) * | 2004-04-08 | 2005-10-20 | Sen Engineering Co., Ltd. | Dielectric barrier discharge excimer light source |
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| US20080030115A1 (en) * | 2004-06-03 | 2008-02-07 | Milhail Erofeev | Barrier Discharge Lamp |
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| FR2874782B1 (en) | 2004-08-26 | 2006-12-08 | Brevetix Sarl | DEVICE FOR HEATING FIELDS, IN PARTICULAR SPORTS |
| DE102004047374A1 (en) * | 2004-09-29 | 2006-04-06 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Dielectric barrier discharge lamp with electrical shielding |
| WO2006079982A1 (en) * | 2005-01-28 | 2006-08-03 | Philips Intellectual Property & Standards Gmbh | Treatment system comprising a dielectric barrier discharge lamp |
| JP2006331903A (en) * | 2005-05-27 | 2006-12-07 | Sen Engineering Kk | Vacuum ultraviolet light source |
| GB2474032B (en) * | 2009-10-01 | 2016-07-27 | Heraeus Noblelight Gmbh | Flash lamp or gas discharge lamp with integrated reflector |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL48671C (en) * | ||||
| US3911318A (en) * | 1972-03-29 | 1975-10-07 | Fusion Systems Corp | Method and apparatus for generating electromagnetic radiation |
| US4503360A (en) * | 1982-07-26 | 1985-03-05 | North American Philips Lighting Corporation | Compact fluorescent lamp unit having segregated air-cooling means |
| CH670171A5 (en) * | 1986-07-22 | 1989-05-12 | Bbc Brown Boveri & Cie | |
| DE3842993A1 (en) * | 1988-12-21 | 1990-07-05 | Beerwald Hans | Ignition device for water-cooled ring (toroidal, electrodeless) discharge tubes |
| CH677292A5 (en) * | 1989-02-27 | 1991-04-30 | Asea Brown Boveri |
-
1991
- 1991-06-01 EP EP19910108988 patent/EP0517929B1/en not_active Expired - Lifetime
- 1991-06-01 DE DE59104972T patent/DE59104972D1/en not_active Expired - Fee Related
-
1992
- 1992-05-13 CA CA 2068574 patent/CA2068574A1/en not_active Abandoned
- 1992-06-01 JP JP4140219A patent/JP2540415B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7573201B2 (en) | 2004-09-29 | 2009-08-11 | Osram Gesellschaft Mit Beschraenkter Haftung | Dielectric barrier discharge lamp having pluggable electrodes |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2540415B2 (en) | 1996-10-02 |
| DE59104972D1 (en) | 1995-04-20 |
| EP0517929A1 (en) | 1992-12-16 |
| JPH05174793A (en) | 1993-07-13 |
| EP0517929B1 (en) | 1995-03-15 |
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| Date | Code | Title | Description |
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