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US3136890A - Broad spectrum prospector - Google Patents

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US3136890A
US3136890A US123978A US12397861A US3136890A US 3136890 A US3136890 A US 3136890A US 123978 A US123978 A US 123978A US 12397861 A US12397861 A US 12397861A US 3136890 A US3136890 A US 3136890A
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radiations
tube
opening
shortwave
ultra
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Harry C Wain
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/64—Fluorescence; Phosphorescence
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
    • F21L14/00—Electric lighting devices without a self-contained power source, e.g. for mains connection
    • F21L14/02—Electric lighting devices without a self-contained power source, e.g. for mains connection capable of hand-held use, e.g. inspection lamps
    • F21L14/026—Electric lighting devices without a self-contained power source, e.g. for mains connection capable of hand-held use, e.g. inspection lamps having a linear light source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2201/00—Features of devices classified in G01N21/00
    • G01N2201/02—Mechanical
    • G01N2201/022—Casings
    • G01N2201/0221—Portable; cableless; compact; hand-held

Definitions

  • the short wave lengths are at 2537 A.
  • the long waves from 3300-3900 A.
  • two separate lamps one for the short and the other for the long wave length.
  • a particular purpose for the use of ultra-violet light having both short and long wave lengths is in the technology known as prospecting, and the location, discovery and identification of various types of minerals and biological compounds which have fluorescent character- It is well known that some minerals and compounds fluoresce more brilliantly under short wave lengths, and others more so under long wavelengths. Others will not fluoresce at all under the short wave lengths but will fluoresce exclusively under the long Wave lengths and Vice versa, making a need for a lamp or source of ultra-violet having both short and long wave lengths.
  • FIGURE 1 is a side elevation schematic view of the arrangement within .the housing, along line 11 of FIGURE 2.
  • FIGURE 2 is a top plan view of the view shown in FIGURE 1.
  • FIGURE 3 is a perspective view of entire device showing it in use.
  • FIGURE 4 is the electrical schematic circuit of the components of the device.
  • the tube 2 of this embodiment is of the elongated unilateral type but could be of a different shape. It is mounted by fluorescent sockets 5 at each end of the container 6.
  • the sockets 5 are of the conventional type and the pin 7 of the tube 2 are of the conventional type and make electrical contact within the socket 5.
  • the phosphor 4 Painted or coated on the rear of the tube 2 is the phosphor 4.
  • the phosphor 4 is coated on the circumference of the tube and to the rear of the tube covering slightly more than half of the rear circumference as shown in the view of FIGURE 1.
  • the design of the coating of phosphor 4 is best or optimum when the phosphor coating 4 is at a point on the surface of the tube 2 from which reflected radiation would re-enter the mercury arc tube 2 rather than pass directly through the filter 1. The reason for this is that any short wave energy which is redirected into the tube is absorbed by the ionized mercury in the tube 2.
  • the radiations in this area By taking the radiations in this area and converting them to long wave ultra-violet radiations, they can be transmitted back through the tube 2 through the filter 1, and are in addition to the other useful radiations being emitted from the lamp, making for a more eflicient transmission of ultra-violet light, rather than having the light from the rear of the tube'2 absorbed and dissipated.
  • the filter 1 which is mounted in the front housing 6a on rubber cushioned metal mounts 16 in the usual manner that glass is mounted, is a Corning filter glass which is known as #9863. It is a fiat sheet of glass that has been designed by Corning to transmit ultra-violet light. It is transparent both to the short wave lengths of ultra-violet light and also to the long waves of ultra-violet light. It also acts as a filter in absorbing almost all visible radiation.
  • the reflector 3 is preferably made of a polished aluminum, which is effective in reflective ultra-violet radiations.
  • the embodiment shown discloses a three sided reflector having an upper plate 3a, a lower plate 30, and a rear plate 3b.
  • the reflector 3 is mounted on its rear plate 3b by rivets 8 in a conventional manner, but could be bolted or fastened in some other equivalent way without departing from the spirit and scope of this invention.
  • FIGURE 4 is a schematic diagram of the conventional electrical circuit.
  • a switch 9 which is shown in FIGURE 3 and in FIGURE 4 must be closed in order to allow the electricity from the battery 10 or the electrical source (which can be an external source) to pass in the circuit.
  • Switch 9 has two positions, one for the battery 15, and one for the external source.
  • the circuit consists of a ballast 11 which is connected in series with each side of the filaments 12 and 13 respectively in the tube 2.
  • the starter switch 14 can be operated either manually or thermally.
  • a resistor 15 is connected in series with the direct current source 12 to provide a resistance to the current flow in order to protect the battery after ionization in the tube 2.
  • the short ultra-violet waves passing through the phosphor 3 to the rear of the tube 2 become long wave ultraviolet light.
  • the long Waves then'will reflect on the aluminum reflector 3 and will be passed back into the tube 2 and also out from the front of the tube through the filter .1.
  • This ultra-violet light because of passing through the phosphor, will be of thelonger wave length than the light that does not pass through the phosphor. This light, being emitted from the rear, is generally lost because the short waves are absorbed by'the mercury vapor after being redirected at the tube.
  • the reflector 3 is not essential to the operation of the device.
  • the phosphor 4 acts as a long wave source of ultra-violet light and radiates in all directions so that some of the long waves of ultra-violet will be transmitted from the front of the tube 2. However, this is not as etficient as the embodiment herein disclosed as is employed with the reflector 3.
  • the cord 17 extends from the bottom of the casing 6 and is connected to a battery or external source in accordance withthe circuit of FIGURE 4.
  • the battery 10 may be carried in a separate pack 19.
  • An ultraviolet radiation generator for detecting and analyzing the fluorescent condition of minerals and like substances and efliciently producing both shortwave ultraviolet radiation and longwave ultraviolet radiations comprising: a housing provided with an opening, a gaseous discharge tube for producing shortwave ultraviolet radiations disposed within the housing and having a portion confronting saidopening, a filter disposed in said opening to remove any visible Wave lengths from the radiations produced by said tube, a phosphor supported with respect to said tube and said opening to receive a large portion of the shortwave radiations from the tube that are not emanated directly through said opening, said phosphor being responsive to saidlreceived shortwave radiations to produce longwave radiations, the gases in said gaseous discharge tube being characterized as absorptive of said shortwave radiations and substantially nonabsorptive of longwave radiations whereby some of the long wave radiations produced by said phosphor are directed through said tube to said'opening, and means for collecting other of said produced longwave radiations and directing said radiations to said opening, whereby a
  • the shortwave ultraviolet radiation being at 2537 A. wavelength and said longwave ultraviolet radiation being from 3300 to 3900 A. wavelength.
  • said gaseous discharge tube comprising a low pressure mercury discharge tube having walls pervious to both said longwave and shortwave radiations, and said filter comprising a glass plate pervious to both Wavelengths of ultraviolet radiation and substantially impervious to visible light.
  • said discharge tube confronting said opening, said phosphor being coated only on the rear portion of said tube whereby shortwave radiations from thefro'nt of the tube may pass directly from the front of the tube to said filter, and an ultraviolet radiation reflector supported within said housing and disposed near said coating to reflect said ultraviolet radiation to said filter.

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  • Health & Medical Sciences (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Description

H. C. WAlN BROAD SPECTRUM PROSPECTOR June 9, 1964 Filed July 12, 1961 INVENTOR. Hoar-mg llWnfiI-u JAM/O W I istics under ultra-violet radiation.
United States Patent 1 3,136,890 BRDAD SPECTRUM PROSPECTOR Harry C. Wain, Hampden Road, Somers, Conn. Filed July 12, 1961, Ser. No. 123,978 a 4 Claims. (Cl. 250-77) This invention is concerned with lamps and particularly that type of lamp that transmits ultra-violet rays which have been filtered so as to remove visible light.
There is available for use two types of ultra-violet rays which may hereinafter be referred to as the short wave lengths and the long wave lengths, both being in the ultra violet spectrum. The short waves are at 2537 A., and the long waves from 3300-3900 A. In order to have the use of both of these wave lengths heretofore it has been necessary to have two separate lamps, one for the short and the other for the long wave length.
It is a primary object of the within invention to provide a single lamp which will simultaneously produce radiations having both short and long wave lengths of invisible light in the ultra-violet spectrum.
A particular purpose for the use of ultra-violet light having both short and long wave lengths is in the technology known as prospecting, and the location, discovery and identification of various types of minerals and biological compounds which have fluorescent character- It is well known that some minerals and compounds fluoresce more brilliantly under short wave lengths, and others more so under long wavelengths. Others will not fluoresce at all under the short wave lengths but will fluoresce exclusively under the long Wave lengths and Vice versa, making a need for a lamp or source of ultra-violet having both short and long wave lengths.
It is an object of the within invention to provide a source of ultra-violet light that is housed in a container that is of light weight and. simple in construction.
It is afurther object of the within invention to provide a lamp in a lightweight container that will, upon energization, transmit. simultaneously ultra-violet light both in the short and long wave spectrum.
It is another. object of the within invention to provide a lamp within a light weight container for producing ultra-violet light but yet without producing visible light.
It is a further object of the within invention to provide a portable self-contained ultra-violet lamp within a housing for producing simultaneously both long and short waves of ultra-violet light.
It is still a further object of the within invention to provide an ultra-violet lamp that will transmit both short and long waves of ultra-violet light simultaneously and that has means for obtaining energy for activating the said ultra-violet light, either from within or without the container.
The above objects are obtained by the use of a simple housing which has mounted therein a low pressure mercury vapor arc tube. Circumscribing a portion of the rear circumference of the tube is a coating of a phosphor of the type used to convert short waves of ultra-violet to long waves. Behind the phosphor is a reflector which will reflect ultra-violet rays. In front of the tube, forward of the area which is coated with the phosphor and of course forward of the reflector is a glass filter. When the lamp is energized, the ultra-violet rays of the short wave spectrum pass from the front of the tube through the filter. Because of the phosphor coating on the rear of the tube, waves being emitted from the rear of the tube are converted into long waves of ultra-violet light. These long waves strike the reflector, which in turn redirects the long waves of ultra-violet light back through the tube and out through the filter so that there are both 3,136,890 Patented June 9, 1964 ICE long and short wave lengths of ultra-violet light passing through the filter towards the object under surveillance.
For a more detailed description of the invention, reference is made to the accompanying drawing, in which:
FIGURE 1 is a side elevation schematic view of the arrangement within .the housing, along line 11 of FIGURE 2.
FIGURE 2 is a top plan view of the view shown in FIGURE 1.
FIGURE 3 is a perspective view of entire device showing it in use.
FIGURE 4 is the electrical schematic circuit of the components of the device.
The tube 2 of this embodiment is of the elongated unilateral type but could be of a different shape. It is mounted by fluorescent sockets 5 at each end of the container 6. The sockets 5 are of the conventional type and the pin 7 of the tube 2 are of the conventional type and make electrical contact within the socket 5.
Painted or coated on the rear of the tube 2 is the phosphor 4. The phosphor 4 is coated on the circumference of the tube and to the rear of the tube covering slightly more than half of the rear circumference as shown in the view of FIGURE 1. The design of the coating of phosphor 4 is best or optimum when the phosphor coating 4 is at a point on the surface of the tube 2 from which reflected radiation would re-enter the mercury arc tube 2 rather than pass directly through the filter 1. The reason for this is that any short wave energy which is redirected into the tube is absorbed by the ionized mercury in the tube 2. By taking the radiations in this area and converting them to long wave ultra-violet radiations, they can be transmitted back through the tube 2 through the filter 1, and are in addition to the other useful radiations being emitted from the lamp, making for a more eflicient transmission of ultra-violet light, rather than having the light from the rear of the tube'2 absorbed and dissipated.
The filter 1 which is mounted in the front housing 6a on rubber cushioned metal mounts 16 in the usual manner that glass is mounted, is a Corning filter glass which is known as #9863. It is a fiat sheet of glass that has been designed by Corning to transmit ultra-violet light. It is transparent both to the short wave lengths of ultra-violet light and also to the long waves of ultra-violet light. It also acts as a filter in absorbing almost all visible radiation.
The reflector 3 is preferably made of a polished aluminum, which is effective in reflective ultra-violet radiations. The embodiment shown discloses a three sided reflector having an upper plate 3a, a lower plate 30, and a rear plate 3b. The reflector 3 is mounted on its rear plate 3b by rivets 8 in a conventional manner, but could be bolted or fastened in some other equivalent way without departing from the spirit and scope of this invention.
FIGURE 4 is a schematic diagram of the conventional electrical circuit. In order to operate the device a switch 9 which is shown in FIGURE 3 and in FIGURE 4 must be closed in order to allow the electricity from the battery 10 or the electrical source (which can be an external source) to pass in the circuit. Switch 9 has two positions, one for the battery 15, and one for the external source. The circuit consists of a ballast 11 which is connected in series with each side of the filaments 12 and 13 respectively in the tube 2. Connected between the fila ments 12 and 13 is a starter switch 14. The starter switch 14 can be operated either manually or thermally. A resistor 15 is connected in series with the direct current source 12 to provide a resistance to the current flow in order to protect the battery after ionization in the tube 2.
The following explanation is the theory of the passing of the various wave lengths of the ultra-violet light and the generating of same. When the switch 9 is closed to permit the electrical source to pass energy through the ballast l1 and also through the starter 14, the filaments 12 and 13 are preheated and energized to a sulficient voltage so that there is an ionization of the gasses, particularly the mercury gases within the tube 2. I
Immediately short wave lengths of ultra-violet light will be transmitted from the tube 2 through the filter 1 which absorbs all other light radiations, and out from the front of the housing 64:.
The short ultra-violet waves passing through the phosphor 3 to the rear of the tube 2 become long wave ultraviolet light. The long Waves then'will reflect on the aluminum reflector 3 and will be passed back into the tube 2 and also out from the front of the tube through the filter .1. This ultra-violet light, because of passing through the phosphor, will be of thelonger wave length than the light that does not pass through the phosphor. This light, being emitted from the rear, is generally lost because the short waves are absorbed by'the mercury vapor after being redirected at the tube. By the novel arrangement of the phosphor coating and the reflectors, the long Waves of ultra-violet now converted from short waves of ultra-violet are put to work and there is no longer a loss of the full use of the light waves. It should be understood that both short and long waves of ultraviolet light are now emitted simultaneously and not separately.
The reflector 3 is not essential to the operation of the device. The phosphor 4 acts as a long wave source of ultra-violet light and radiates in all directions so that some of the long waves of ultra-violet will be transmitted from the front of the tube 2. However, this is not as etficient as the embodiment herein disclosed as is employed with the reflector 3.
The cord 17 extends from the bottom of the casing 6 and is connected to a battery or external source in accordance withthe circuit of FIGURE 4. The battery 10 may be carried in a separate pack 19.
I claim:
1. An ultraviolet radiation generator for detecting and analyzing the fluorescent condition of minerals and like substances and efliciently producing both shortwave ultraviolet radiation and longwave ultraviolet radiations comprising: a housing provided with an opening, a gaseous discharge tube for producing shortwave ultraviolet radiations disposed within the housing and having a portion confronting saidopening, a filter disposed in said opening to remove any visible Wave lengths from the radiations produced by said tube, a phosphor supported with respect to said tube and said opening to receive a large portion of the shortwave radiations from the tube that are not emanated directly through said opening, said phosphor being responsive to saidlreceived shortwave radiations to produce longwave radiations, the gases in said gaseous discharge tube being characterized as absorptive of said shortwave radiations and substantially nonabsorptive of longwave radiations whereby some of the long wave radiations produced by said phosphor are directed through said tube to said'opening, and means for collecting other of said produced longwave radiations and directing said radiations to said opening, whereby a portion of said longwave radiations directed through said opening are obtained from shortwave radiations that would otherwise not be directed to said opening.
2. In the generator of claim 1, the shortwave ultraviolet radiation being at 2537 A. wavelength and said longwave ultraviolet radiation being from 3300 to 3900 A. wavelength.
3. In the generator of claim 1, said gaseous discharge tube comprising a low pressure mercury discharge tube having walls pervious to both said longwave and shortwave radiations, and said filter comprising a glass plate pervious to both Wavelengths of ultraviolet radiation and substantially impervious to visible light.
4. In'the generator of claim 1, said discharge tube confronting said opening, said phosphor being coated only on the rear portion of said tube whereby shortwave radiations from thefro'nt of the tube may pass directly from the front of the tube to said filter, and an ultraviolet radiation reflector supported within said housing and disposed near said coating to reflect said ultraviolet radiation to said filter.
References Cited in the file of this patent UNITED STATES PATENTS

Claims (1)

1. AN ULTRAVIOLET RADIATION GENERATOR FOR DETECTING AND ANALYZING THE FLUORESCENT CONDITION OF MINERALS AND LIKE SUBSTANCES AND EFFICIENTLY PRODUCING BOTH SHORTWAVE ULTRAVIOLET RADIATION AND LONGWAVE ULTRAVIOLET RADIATIONS COMPRISING: A HOUSING PROVIDED WITH AN OPENING, A GASEOUS DISCHARGE TUBE FOR PRODUCING SHORTWAVE ULTRAVIOLET RADIATIONS DISPOSED WITHIN THE HOUSING AND HAVING A PORTION CONFRONTING SAID OPENING, A FILTER DISPOSED IN SAID OPENING TO REMOVE ANY VISIBLE WAVE LENGTHS FROM THE RADIATIONS PRODUCED BY SAID TUBE, A PHOSPHOR SUPPORTED WITH RESPECT TO SAID TUBE AND SAID OPENING TO RECEIVE A LARGE PORTION OF THE SHORTWAVE RADIATIONS FROM THE TUBE THAT ARE NOT EMANATED DIRECTLY THROUGH SAID OPENING, SAID PHOSPHOR BEING RESPONSIVE TO SAID RECEIVED SHORTWAVE RADIATIONS TO PRODUCE LONGWAVE RADIATIONS, THE GASES IN SAID GASEOUS DISCHARGE TUBE BEING CHARACTERIZED AS ABSORPTIVE OF SAID SHORTWAVE RADIATIONS AND SUBSTANTIALLY NONABSORPTIVE OF LONGWAVE RADIATIONS WHEREBY SOME OF THE LONG WAVE RADIATIONS PRODUCED BY SAID PHOSPHOR ARE DIRECTED THROUGH SAID TUBE TO SAID OPENING, AND MEANS FOR COLLECTING OTHER OF SAID PRODUCED LONGWAVE RADIATIONS AND DIRECTING SAID RADIATIONS TO SAID OPENING, WHEREBY A PORTION OF SAID LONGWAVE RADIATIONS DIRECTED THROUGH SAID OPENING ARE OBTAINED FROM SHORTWAVE RADIATIONS THAT WOULD OTHERWISE NOT BE DIRECTED TO SAID OPENING.
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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4471226A (en) * 1982-02-16 1984-09-11 Armstrong World Industries, Inc. Safety applicator for radiation
US4990789A (en) * 1988-05-10 1991-02-05 Osamu Uesaki Ultra violet rays generator by means of microwave excitation
WO1993023730A1 (en) * 1992-05-08 1993-11-25 Labino Patent Ab Lamp for transmitting ultraviolet light
US5561290A (en) * 1995-06-09 1996-10-01 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Optical detector calibrator system
WO1996031769A1 (en) * 1995-04-05 1996-10-10 Brasscorp Ltd. Fault locating device, system and method
US5627362A (en) * 1995-05-01 1997-05-06 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Portable light source unit for simulating fires having an adjustable aperture
US5920075A (en) * 1997-10-22 1999-07-06 Whitehead; Michael D. Ultraviolet sterilization device
US6177678B1 (en) 1995-04-05 2001-01-23 Brasscorp Ltd. Method and apparatus for leak detection and non-destructive testing
US6361194B1 (en) 1999-10-29 2002-03-26 Spx Corporation Handheld ultraviolet inspection lamp
US6585392B2 (en) * 2001-10-04 2003-07-01 Jong-Jiing Shiau Portable lamp having both a germicidal and black-glass lamp tubes
WO2003073173A2 (en) * 2002-02-22 2003-09-04 University Of Liege Portable holographic marking unit
AU2003262498B2 (en) * 1997-04-03 2005-08-18 Bright Solutions, Inc. Light Source for Use In Leak Detection in Heating, Ventilating, and Air Conditioning Systems
US10910210B2 (en) * 2017-01-10 2021-02-02 Ushio Denki Kabushiki Kaisha Ultraviolet sterilizer

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1981954A (en) * 1931-03-26 1934-11-27 Milprint Products Corp Process of treating fabrics or clothes during laundering operations and apparatus therefor
US2093735A (en) * 1931-03-23 1937-09-21 Metlox Corp Ltd Ultraviolet light source
US2347672A (en) * 1941-01-31 1944-05-02 Arnold D Dircksen Ultraviolet instrument light
US2355258A (en) * 1941-05-13 1944-08-08 Sylvania Electric Prod Ultraviolet fluorescent lamp
US2365342A (en) * 1942-01-30 1944-12-19 Sylvania Electric Prod Electric gaseous discharge device
US2445692A (en) * 1945-10-11 1948-07-20 Gen Electric Ultraviolet ray generator
US2919365A (en) * 1956-03-02 1959-12-29 Sylvania Electric Prod High pressure mercury vapor lamp

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2093735A (en) * 1931-03-23 1937-09-21 Metlox Corp Ltd Ultraviolet light source
US1981954A (en) * 1931-03-26 1934-11-27 Milprint Products Corp Process of treating fabrics or clothes during laundering operations and apparatus therefor
US2347672A (en) * 1941-01-31 1944-05-02 Arnold D Dircksen Ultraviolet instrument light
US2355258A (en) * 1941-05-13 1944-08-08 Sylvania Electric Prod Ultraviolet fluorescent lamp
US2365342A (en) * 1942-01-30 1944-12-19 Sylvania Electric Prod Electric gaseous discharge device
US2445692A (en) * 1945-10-11 1948-07-20 Gen Electric Ultraviolet ray generator
US2919365A (en) * 1956-03-02 1959-12-29 Sylvania Electric Prod High pressure mercury vapor lamp

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4471226A (en) * 1982-02-16 1984-09-11 Armstrong World Industries, Inc. Safety applicator for radiation
US4990789A (en) * 1988-05-10 1991-02-05 Osamu Uesaki Ultra violet rays generator by means of microwave excitation
WO1993023730A1 (en) * 1992-05-08 1993-11-25 Labino Patent Ab Lamp for transmitting ultraviolet light
US6177678B1 (en) 1995-04-05 2001-01-23 Brasscorp Ltd. Method and apparatus for leak detection and non-destructive testing
WO1996031769A1 (en) * 1995-04-05 1996-10-10 Brasscorp Ltd. Fault locating device, system and method
US5804822A (en) * 1995-04-05 1998-09-08 Brasscorp. Ltd. Fault locating device, system and method
US5627362A (en) * 1995-05-01 1997-05-06 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Portable light source unit for simulating fires having an adjustable aperture
US5561290A (en) * 1995-06-09 1996-10-01 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Optical detector calibrator system
AU2003262498B2 (en) * 1997-04-03 2005-08-18 Bright Solutions, Inc. Light Source for Use In Leak Detection in Heating, Ventilating, and Air Conditioning Systems
AU2003262498B9 (en) * 1997-04-03 2005-09-08 Bright Solutions, Inc. Light Source for Use In Leak Detection in Heating, Ventilating, and Air Conditioning Systems
US5920075A (en) * 1997-10-22 1999-07-06 Whitehead; Michael D. Ultraviolet sterilization device
US6361194B1 (en) 1999-10-29 2002-03-26 Spx Corporation Handheld ultraviolet inspection lamp
US6585392B2 (en) * 2001-10-04 2003-07-01 Jong-Jiing Shiau Portable lamp having both a germicidal and black-glass lamp tubes
WO2003073173A2 (en) * 2002-02-22 2003-09-04 University Of Liege Portable holographic marking unit
WO2003073173A3 (en) * 2002-02-22 2003-11-20 Univ Liege Portable holographic marking unit
US10910210B2 (en) * 2017-01-10 2021-02-02 Ushio Denki Kabushiki Kaisha Ultraviolet sterilizer

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