WO2000034982A1 - Tube a decharge gazeuse - Google Patents
Tube a decharge gazeuse Download PDFInfo
- Publication number
- WO2000034982A1 WO2000034982A1 PCT/JP1999/006909 JP9906909W WO0034982A1 WO 2000034982 A1 WO2000034982 A1 WO 2000034982A1 JP 9906909 W JP9906909 W JP 9906909W WO 0034982 A1 WO0034982 A1 WO 0034982A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- aperture
- discharge tube
- opening
- gas discharge
- electrode
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/68—Lamps in which the main discharge is between parts of a current-carrying guide, e.g. halo lamp
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/04—Electrodes; Screens; Shields
- H01J61/10—Shields, screens, or guides for influencing the discharge
Definitions
- the present invention relates to a gas discharge tube, and more particularly to a gas discharge tube used as an ultraviolet light source such as a spectrophotometer and liquid chromatography.
- the converging aperture which forms a small hole, has a size of 0.4 mm in width and 2.5 mm in height, so arc discharge is likely to occur, but high brightness and uniform slit shape There is a problem that it is difficult to obtain a luminous flux.
- the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a gas discharge tube capable of obtaining high-intensity and uniform slit-like emission light.
- a gas discharge tube comprises: a hot cathode for generating thermoelectrons; an anode for receiving the thermoelectrons; and a converging device for disposing thermoelectrons between the hot cathode and the anode.
- the focusing electrode has a slit-shaped focusing aperture and the length of the focusing aperture in the longitudinal direction is A and the length of the aperture in the direction perpendicular to the longitudinal direction is B, B / A Is in the range of 0.1 to 0.5, and the opening area is in the range of 0.15 to 0.5 mm2.
- a round hole with a diameter of 0.5 mm is a general limit due to an increase in the firing voltage or the occurrence of abnormal discharge. This is because if the diameter of the focusing aperture is reduced to 0.5 mm or less, the barrier between the hot cathode and the anode increases, and a large amount of energy is required to start discharge. If this energy is increased (for example, the discharge voltage is increased), a situation occurs in which the gas discharge tube does not light due to abnormal discharge. In order to secure a stable discharge start, the inventor paid attention to the area of the slit-shaped convergent aperture.
- the aperture area was narrowed to the range of 0.15 to 0.5 mm2 in order to ensure high brightness while enabling lighting of the gas discharge tube.
- the inventor has determined that the length A of the convergent opening in the longitudinal direction and the length of the opening in the direction orthogonal to the longitudinal direction. We focused on the relationship with B.
- the shape of the convergent aperture was specified using the relational expression of B / A, and the value was narrowed down to the range of 0.1 to 0.5.
- the converging aperture by limiting the converging aperture with various parameters, we succeeded in specifying high-brightness and uniform slit light with good lighting properties in the gas discharge tube, and using the emitted light.
- B / A is preferably in the range of 0.1 to 0.25, and the aperture area is preferably in the range of 0.15 to 0.25 mm2.
- FIG. 1 is a perspective view showing one embodiment of the gas discharge tube according to the present invention.
- FIG. 2 is an exploded perspective view of a light emitting unit in the gas discharge tube of FIG.
- FIG. 3 is a perspective view showing a state before assembling the support plate and the anode in the light emitting unit of FIG.
- FIG. 4 is a perspective view showing a state before assembling the discharge shielding plate and the anode in the light emitting unit of FIG.
- FIG. 5 is a plan view showing a positional relationship among a discharge shielding plate, an anode, and a support plate in the light emitting unit of FIG.
- FIG. 6 is a sectional view taken along the line VI-VI of FIG.
- FIG. 7 is a sectional view taken along the line VII-VII in FIG.
- FIG. 8 is a perspective view showing an example of an aperture limiting plate applied to the gas discharge tube of the present invention.
- FIG. 9 is a sectional view taken along the line IX-IX of FIG.
- FIG. 10 is a schematic diagram showing a convergent aperture.
- FIG. 11 is a graph showing the relationship between the aperture area and the aspect ratio of the aperture in the convergent aperture.
- FIG. 12 is a schematic view showing another example of the convergent aperture. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 shows a side-on type deuterium lamp as an example of a gas discharge tube.
- a light-emitting portion 20 is housed inside a glass envelope 11, and a deuterium gas (not shown) is filled in at several Torr.
- the bottom of the envelope 11 formed into a cylindrical shape by sealing the top is hermetically sealed by a glass stem 12.
- the envelope 11 is made of an ultraviolet transmitting glass, a quartz glass, or the like having a good ultraviolet transmittance.
- the light emitting part 20 is assembled in a shielding box structure in which a ceramic supporting plate 22 and a metal front window electrode 23 are bonded together with a ceramic discharging shielding plate (spacer) 21 interposed therebetween. Have been.
- the support plate 22 having a prism shape with a convex cross section has a longitudinal through hole 220, a concave groove 22 1 to 22 3, a concave portion 2 24, and 4. There are formed two convex portions 2 25 and four lateral through holes 2 26.
- the vertical through hole 220 penetrates vertically through the raised portion 22 ⁇ behind the support plate 22 having a convex cross section.
- the concave groove 2 2 1, the concave 2 2 4, and the concave grooves 2 2, 2 2 3 are formed to be depressed from the surface of the front flat plate portion 2 2 B, and sequentially toward the bottom of the envelope 11. Extending.
- the four convex portions 2 25 are formed two by two in the vicinity of the opening edges of the concave grooves 2 2 1 and 2 2 2 so as to face each corner of the anode 2 4. It protrudes from the surface.
- the four horizontal through-holes 226 extend in the horizontal direction, and penetrate at two locations at the upper end and the lower end.
- a lead pin 1 3 for inserting the vertical through hole 2 2 0 is held by the stem 1 2 via the lead pins 1 4 accommodated in the recessed groove 2 2 1-2 2 3
- the anode 24 formed into a rectangular plate shape is fixed to the tip of the lead pin 14 by welding, and is supported from the back surface by four projections 22. Behind this anode 24, The heat dissipation space is ensured by the recesses 224 forming openings substantially equal to the surface area of the anodes 24.
- the discharge shielding plate 21 formed into a flat plate has a thinner and wider cross-sectional convex shape than the support plate 22, and has a through hole 210 and a concave portion.
- 2 1 1, vertical through hole 2 1 2, 4 horizontal through holes 2 1 3, 2 horizontal through holes 2 1 4, and 4 horizontal through holes 2 15 .
- the through hole 210 penetrates substantially the center of the discharge shielding plate 21 so as to face the anode 24.
- the recessed portion 211 is recessed from the surface of the flat plate portion 21A on the back side of the discharge shielding plate 21 to accommodate the anode 24, and the first recessed portion located on the back side of the through hole 210. Opening edge.
- the vertical through hole 2 1 2 penetrates the front raised portion 2 1B.
- the four lateral through holes 2 13 extend in the horizontal direction, and face the four lateral through holes 2 26 of the support plate 22.
- the two horizontal through holes 2 14 in the discharge shielding plate 21 are formed at positions for accommodating the locking claws 27 1 of the cathode slit electrode 27 described later, and the four horizontal through holes 2 1 Reference numeral 5 is formed at a position for accommodating a locking claw 2 31 of the front window electrode 23 described later.
- Electrode rods 250 and 251, respectively, are welded to both ends of the hot cathode (filament) 25.
- the tip of the electrode rod 250 is welded to the electrode rod 2 16, and the tip of the electrode rod 25 1 is welded to the tip of the lead pin 16. In this way, the hot cathode 25 is held on the stem 12.
- the rectangular anode 24 shown by the broken line is accommodated in the recessed portion 211 of the discharge shield plate 21, and each corner of the anode 24 is formed by the discharge shield plate 21.
- the recessed portion 2 1 a substantially rectangular through-hole 2 1 0 tinged c roundness being nipped first bottom and the four protrusions 2 2 5 cooperation of the support plate 2 2, the anode 2 Most of the four sides of 4 match, The other part of the first opening edge is joined to the four corners of the anode 24.
- the four convex portions 222 having a circular surface are joined to the four corner portions of the anode 24 and press the anode 24.
- FIG. 1 a substantially rectangular through-hole 2 1 0 tinged c roundness being nipped first bottom and the four protrusions 2 2 5 cooperation of the support plate 2 2, the anode 2 Most of the four sides of 4 match, The other part of the first opening edge is joined to the four corners of the anode 24.
- the rectangular depression 2 11 has a depth corresponding to the sum of the height of the four projections 2 25 and the thickness of the anode 24, and as a result, The outer peripheral edge formed on the front surface of the support plate 22 can be brought into contact with the back surface of the discharge shielding plate 21.
- a focusing electrode 26 formed by bending a metal plate into a substantially L-shape has an opening 260 and four lateral through holes 263.
- the opening 260 is arranged coaxially with the through hole 210 of the discharge shielding plate 21.
- An opening limiting plate 261 for limiting the opening diameter is welded to a region around the opening 260.
- the opening limiting plate 26 1 is provided with an arc-shaped ball receiving recess 26 2 protruding toward the anode 24 so as to pass through the opening 260, and has a slit-shaped converging opening 4 at the center. 0 is formed.
- the four horizontal through holes 263 are formed through the focusing electrode 26 in the thickness direction so as to face the four horizontal through holes 2 13 of the discharge shielding plate 21.
- the focusing electrode 26 is provided so as to be in contact with the raised portion 21 B of the discharge shielding plate 21, the tip 26 A bent backward and the lead pin 13 protruding from the support plate 22. And the tip is welded. In this way, the focusing electrode 26 is fixed to the discharge shielding plate 21 and the support plate 22.
- the distance between the opening limiting plate 26 1 and the anode 24 is smaller than the thickness of the discharge shielding plate 21.
- each of the horizontal through holes 2 26, 21 3, and 26 3 of the discharge shield plate 21, the support plate 22, and the focusing electrode 26 are aligned in a straight line.
- the metal cathode slit electrode 27 is bent in accordance with the shape of the step region of the discharge shielding plate 21, and the opening 27 Stop It has claws 2 7 1.
- An opening 270 shaped into a vertically long rectangle is formed at the front of the cathode slit electrode 27.
- the two locking claws 2 71 formed on the upper and lower ends of the cathode slit electrode 27 are bent rearward.
- the cathode slit electrode 27 is opposed to the hot cathode 25 and is set on the front surface on one side of the discharge shield plate 21, and the two locking claws 27 1 are connected to the two pieces of the discharge shield plate 21. It is fixed to the discharge shielding plate 21 by being inserted into the horizontal through hole 2 14. Note that the opening 270 is arranged between the hot cathode 25 and the opening limiting plate 261.
- the metal front window electrode 23 has a substantially U-shaped cross section bent in four steps, and also has an opening window 230 and four locking claws 2 31.
- the opening window 230 formed in a rectangular shape is arranged coaxially with the arc ball accommodating recess 262 of the focusing electrode 26.
- Four locking claws 2 31 formed on the upper and lower sides of both sides of the front window electrode 23 project rearward.
- the opening window 230 is disposed at a position where ultraviolet rays are projected from the space in front of the arc ball storage recessed portion 262.
- the front window electrode 23 is fixed to the discharge shielding plate 21 by inserting four locking claws 2 31 into the four lateral through holes 2 15 of the discharge shielding plate 21.
- the focusing electrode 26 has a discharge shielding plate 21 with respect to the cathode slit electrode 27 and the front window electrode 23. Electrically insulated via On the other hand, the cathode slit electrode 27 and the front window electrode 23 are in contact with each other and are set to the same potential.
- the trigger switch When the trigger discharge is ready in this way, the trigger switch is set to the ON state, a potential of about 150 V is generated at the focusing electrode 26, and the hot cathode 25 and the focusing electrode 26 are connected. A trigger discharge is generated in between.
- the focusing electrode 26 is electrically insulated from the cathode slit electrode 27 and the front window electrode 23, the cathode slit electrode 27 and the front window electrode set to almost 0 V potential. A positive potential higher than 23 can be generated at the focusing electrode 26. Therefore, as shown in FIG. 6, a trigger discharge region 30 is generated so as to extend from the hot cathode 25, and this trigger discharge region 30 is a space surrounded by the front window electrode 23 and the cathode slit electrode 27, That is, it expands from the inside of the force sword box and reaches the focusing electrode 26.
- a trigger discharge is generated between the hot cathode 25 and the aperture limiting plate 261, and as a result, a flat arc ball Y is generated in the arc ball receiving recess 262.
- Ultraviolet light extracted from the arc ball (that is, positive polar light emission) Y is emitted as slit light through the opening window 230 of the front window electrode 23.
- the aperture limiting plate 26 1 provided on the focusing electrode 26 has a rectangular flat substrate 42 made of molybdenum which is a high melting point metal.
- a cup-shaped arc ball receiving recess 262 formed by press-molding the substrate 42 is provided in the center of the opening limiting plate 261.
- the opening diameter D of the arc ball converging concave portion 26 2 is about 4 mm, and a flat portion 41 is formed at the bottom of the arc ball accommodating concave portion 26 2. At the center of the flat portion 41, a slit-shaped convergent opening 40 is formed.
- the substrate 42 has a size of 8 ⁇ 8 mm and a thickness of about 0.3 to 0.7 mm. However, there is also a high melting point metal such as tungsten. Further, in the generally known convergent aperture 40, a round hole having a diameter of 0.5 mm is a general limit due to an increase in a discharge starting voltage or occurrence of abnormal discharge.
- the opening area S was narrowed to a range of 0.15 to 0.5 mm2 in order to ensure high luminance while enabling lighting of the gas discharge tube 10 created by the rectangular convergent opening 40.
- the opening area S is less than 0.15 mm2, the lighting of the gas discharge tube 10 will not be stable, and if the opening area S exceeds 0.5 mm2, the light will spread too much and become spot-like. Experiments have shown that it is difficult to use it as natural light.
- the value of BZA is preferably in the range of 0.1 to 0.25, and the opening area S is preferably in the range of 0.15 to 0.25 mm2.
- the opening area S is preferably in the range of 0.15 to 0.25 mm2.
- the slit light emitted from such a gas discharge tube 10 is used as a light source in an analyzer such as a spectrophotometer, liquid chromatography, and capillary electrophoresis.
- an analyzer such as a spectrophotometer, liquid chromatography, and capillary electrophoresis.
- spot-like light has been used as a light source for analysis to prevent the effects of optical systems and stray light.However, as the cells of analyzers are becoming narrower, stronger and smaller slit-like spot lights are required. Has been reached. Therefore, the gas discharge tube 10 shown in the above-described embodiment sufficiently satisfies such a demand.
- the present invention is not limited to the above-described embodiment. For example, as shown in FIG. 12, even if an elongated elliptical convergent opening 60 is adopted in the aperture limiting plate 261, 11 enables the application of the graph shown in 1.
- a side-on type deuterium lamp has been described.
- the present invention relates to a head-on type deuterium lamp as described in, for example, FIGS. 9 and 10 of US Pat. No. 5,867,625. It can also be applied to a type of deuterium lamp.
- the gas discharge tube of this invention is excellent in lighting property, and can obtain high-intensity and uniform slit-shaped emission light. Therefore, c can suitably be applied as a light source of the analyzer, such as a spectrophotometer, liquid chromatography and Kiyabirari electrophoresis
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU17973/00A AU1797300A (en) | 1998-12-09 | 1999-12-09 | Gas discharge tube |
DE69906151T DE69906151T2 (de) | 1998-12-09 | 1999-12-09 | Gasentladungsröhre |
EP99961287A EP1154462B1 (en) | 1998-12-09 | 1999-12-09 | Gas discharge tube |
US09/875,923 US20020011771A1 (en) | 1998-12-09 | 2001-06-08 | Gas discharge tube |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10/350439 | 1998-12-09 | ||
JP10350439A JP2000173548A (ja) | 1998-12-09 | 1998-12-09 | ガス放電管 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/875,923 Continuation-In-Part US20020011771A1 (en) | 1998-12-09 | 2001-06-08 | Gas discharge tube |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000034982A1 true WO2000034982A1 (fr) | 2000-06-15 |
Family
ID=18410513
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1999/006909 WO2000034982A1 (fr) | 1998-12-09 | 1999-12-09 | Tube a decharge gazeuse |
Country Status (6)
Country | Link |
---|---|
US (1) | US20020011771A1 (ja) |
EP (1) | EP1154462B1 (ja) |
JP (1) | JP2000173548A (ja) |
AU (1) | AU1797300A (ja) |
DE (1) | DE69906151T2 (ja) |
WO (1) | WO2000034982A1 (ja) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100416749C (zh) | 2002-04-30 | 2008-09-03 | 浜松光子学株式会社 | 气体放电管 |
JP3984177B2 (ja) | 2003-02-12 | 2007-10-03 | 浜松ホトニクス株式会社 | ガス放電管 |
JP3984179B2 (ja) * | 2003-02-20 | 2007-10-03 | 浜松ホトニクス株式会社 | ガス放電管 |
JP4519697B2 (ja) * | 2005-03-30 | 2010-08-04 | 浜松ホトニクス株式会社 | 光源装置 |
DE102008062410A1 (de) | 2008-12-17 | 2010-07-01 | Heraeus Noblelight Gmbh | Kathodenabschirmung bei Deuteriumlampen |
US20150024152A1 (en) | 2013-07-19 | 2015-01-22 | Agilent Technologies, Inc. | Metal components with inert vapor phase coating on internal surfaces |
US10767259B2 (en) | 2013-07-19 | 2020-09-08 | Agilent Technologies, Inc. | Components with an atomic layer deposition coating and methods of producing the same |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04147557A (ja) * | 1990-10-11 | 1992-05-21 | Hitachi Ltd | 重水素放電管 |
EP0727812A2 (en) * | 1995-02-17 | 1996-08-21 | Hamamatsu Photonics K.K. | Gas discharge tube |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2769436B2 (ja) * | 1994-08-31 | 1998-06-25 | 浜松ホトニクス株式会社 | ガス放電管及びその点灯装置 |
-
1998
- 1998-12-09 JP JP10350439A patent/JP2000173548A/ja active Pending
-
1999
- 1999-12-09 EP EP99961287A patent/EP1154462B1/en not_active Expired - Lifetime
- 1999-12-09 DE DE69906151T patent/DE69906151T2/de not_active Expired - Fee Related
- 1999-12-09 WO PCT/JP1999/006909 patent/WO2000034982A1/ja active IP Right Grant
- 1999-12-09 AU AU17973/00A patent/AU1797300A/en not_active Abandoned
-
2001
- 2001-06-08 US US09/875,923 patent/US20020011771A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04147557A (ja) * | 1990-10-11 | 1992-05-21 | Hitachi Ltd | 重水素放電管 |
EP0727812A2 (en) * | 1995-02-17 | 1996-08-21 | Hamamatsu Photonics K.K. | Gas discharge tube |
Non-Patent Citations (1)
Title |
---|
See also references of EP1154462A4 * |
Also Published As
Publication number | Publication date |
---|---|
US20020011771A1 (en) | 2002-01-31 |
EP1154462A4 (en) | 2002-04-10 |
EP1154462A1 (en) | 2001-11-14 |
JP2000173548A (ja) | 2000-06-23 |
DE69906151D1 (de) | 2003-04-24 |
DE69906151T2 (de) | 2003-10-16 |
EP1154462B1 (en) | 2003-03-19 |
AU1797300A (en) | 2000-06-26 |
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