WO2005093786A1 - フラッシュランプ - Google Patents
フラッシュランプ Download PDFInfo
- Publication number
- WO2005093786A1 WO2005093786A1 PCT/JP2005/004659 JP2005004659W WO2005093786A1 WO 2005093786 A1 WO2005093786 A1 WO 2005093786A1 JP 2005004659 W JP2005004659 W JP 2005004659W WO 2005093786 A1 WO2005093786 A1 WO 2005093786A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cathode
- anode
- discharge
- trigger electrode
- flash lamp
- 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
- H01J61/02—Details
- H01J61/54—Igniting arrangements, e.g. promoting ionisation for starting
- H01J61/545—Igniting arrangements, e.g. promoting ionisation for starting using an auxiliary electrode inside the vessel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
- H01J61/80—Lamps suitable only for intermittent operation, e.g. flash lamp
Definitions
- the present invention relates to a flash lamp applicable as a light source for a spectroscopic analyzer, an emission analyzer, and the like.
- Flash lamps have been used as light sources for spectroscopic analyzers, emission analyzers, and the like.
- Flash lamps are generally comprised of a sealed container made of glass, a cathode and an anode containing an electron-emissive substance, which are arranged opposite each other in the sealed container, and a trigger electrode (trigger) arranged in the sealed container. Probe).
- a trigger voltage pulse is applied to the trigger electrode while a predetermined voltage is applied between the cathode and the anode, first, a preliminary discharge occurs between the cathode and the trigger electrode. After that, the electron emission material force of the cathode also emits electrons toward the anode, causing the main discharge of the arc.
- this flash lamp performs pulse lighting that emits arc light every time a trigger voltage pulse is applied to the trigger electrode (for example, see Patent Document 1).
- Patent Document 1 US Patent No. 4020379
- FIG. 1 is a side view showing an electrode arrangement of a conventional flash lamp.
- FIG. 2 is a diagram for explaining the structure of the cathode.
- FIG. 3 is a diagram showing a discharge space defined between the cathode and the anode.
- FIG. 4 is a diagram for explaining the discharge path of the flash lamp according to the present invention in comparison with the discharge path of the conventional flash lamp. The discharge path is shown.
- the present invention has been made to solve the above-described problems, and has an object to provide a flash lamp having a structure for realizing higher light output stability. .
- a flash lamp includes a sealed container in which an inert gas is sealed, and a cathode, an anode, and a trigger electrode respectively housed in the sealed container.
- the cathode and the anode are arranged opposite each other to enable arcing in the sealed container.
- the trigger electrode is an electrode for performing a preliminary discharge in a sealed container prior to the arc discharge. It is.
- the trigger electrode includes a discharge facing surface of a cathode from which electrons are emitted (cathode facing surface), a discharge facing surface of an anode from which electrons are absorbed (anode facing surface), and a cathode facing surface and an anode discharging facing surface.
- the term “trigger electrode” means a float portion (including a tip portion) physically separated from a sealed container unless otherwise specified.
- the discharge path is limited as compared with the conventional flash lamp, and the variation of the light output for each pulse lighting is reduced. As a result, a flash lamp with improved light output stability can be obtained.
- the trigger electrode is arranged so as to penetrate the discharge space until the tip end protrudes out of the discharge space. In this case, even if the tip portion of the trigger electrode changes due to the consumption of the tip portion due to the discharge, the tip position after the consumption is maintained at a position that stabilizes the light output relatively. Lighting ⁇ Stability is maintained until the end.
- the trigger electrode may be arranged so as to extend toward the discharge space until its tip end is located in front of the discharge space.
- the trigger electrode extends to such an extent that its tip can be located in the discharge space, and the float of the trigger electrode including the tip is connected to the cathode and anode so that the float does not cross the discharge space. It may be arranged in a direction perpendicular to the central axis, that is, shifted upward or downward of the discharge space. In any arrangement state, the light output is maintained at a relatively stable position even when the tip of the trigger electrode is worn.
- FIG. 1 is a side view showing an electrode arrangement of a conventional flash lamp.
- FIG. 2 is a diagram for explaining a structure of a cathode.
- FIG. 3 is a diagram showing a discharge space defined between a cathode and an anode.
- FIG. 4 is a diagram for explaining a discharge path of a flash lamp according to the present invention in comparison with a discharge path of a conventional flash lamp.
- FIG. 5 is a plan view showing a configuration of a flash lamp according to a first embodiment of the present invention.
- FIG. 6 is a side view showing the electrode arrangement of the flash lamp according to the first embodiment shown in FIG.
- FIG. 7 is a view for explaining an arrangement of a trigger electrode (particularly, a float portion including a tip portion) with respect to a discharge space.
- FIG. 8 is a side view showing an electrode arrangement in a second embodiment of the flash lamp according to the present invention.
- FIG. 9 is a side view showing an electrode arrangement in a third embodiment of the flash lamp according to the present invention.
- FIG. 10 is a graph showing the relationship between the trigger electrode protrusion length and the light output stability. Explanation of symbols
- FIG. 2 and FIG. 4 described above are referred to as necessary. Also in the description of the drawings Here, the same portions and the same members are denoted by the same reference numerals, and overlapping description will be omitted.
- FIG. 5 is a plan view showing the configuration of the first embodiment of the flash lamp according to the present invention.
- the flash lamp 1 is a lamp that emits white light in a pulsed manner, and includes a cylindrical glass sealed container 80, a cathode 10, an anode 20, and a trigger housed in the sealed container 80, respectively.
- An electrode 30 (trigger probe) and a spa-power electrode 60 are provided.
- the cathode 10 and the anode 20 are arranged in a sealed container 80 so as to face each other.
- the trigger electrode 30 is arranged so that the tip thereof protrudes from the space between the cathode 10 and the anode 20.
- the spar force electrode 60 is an electrode for stably causing the discharge of the flash lamp 1 every time. Xenon gas is sealed in the sealed container 80.
- the cathode 10 and the anode 20 have a dome shape in which a cone is combined with one end surface of a cylinder.
- the trigger electrode 30 will be simply referred to as the float portion (including the tip portion) physically separated from the sealed container 80 unless otherwise specified.
- the cathode 10 and the anode 20 are connected to a main power supply, respectively, and a predetermined voltage is applied. Further, a predetermined trigger voltage is applied to the trigger electrode 30 in a state where the trigger electrode 30 is connected to the trigger power supply unit, and the light emission timing is controlled.
- FIG. 6 is a side view showing the electrode arrangement of the flash lamp 1 according to the first embodiment.
- the cathode 10 and the anode 20 are arranged such that the cathode tip 12 and the anode tip 22 face each other, and the center line CL is aligned.
- the distance between the cathode 10 and the anode 20 is set to 1.5 ⁇ 0.2 mm.
- the cathode 10 has a discharge facing surface 14 (cathode discharge facing surface) at its tip, and the anode has a discharge facing surface 24 (anode discharge facing surface).
- Each diameter of the cathode discharge facing surface 14 and the anode discharge facing surface 24 is 200 m.
- a cylindrical discharge space 50 is defined by the cathode discharge facing surface 14, the anode discharge facing surface 24, and a surface composed of a linear bus connecting the outer peripheral lines of the cathode discharge facing surface 14 and the anode discharge facing surface 24.
- the "discharge facing surface” is a surface where electrons are emitted and absorbed at the respective tips of the cathode and the anode as described above.
- regions (b) and (c) in FIG. 2 enlarged views of the discharge facing surface of the cathode 10 are shown.
- the “discharge facing surface” refers to the point at which the tangents L and L ′ along the shape of the tip of the cathode correspond to the tip of the cathode in the cathode 10 having a sharp tip. Formed by connecting the contacts a, a ' (The shaded area shown in the area (b)) corresponds to the cathode discharge facing surface 14.
- the “discharge facing surface” is such that the force at the electrode center (cathode tip 12) does not exceed 150 m. Therefore, as shown in the area (c) in FIG. 2, when the contacts a and a 'are more than 150 m from the cathode tip 12, the cathode tip inside the part connecting the contacts a and a' The portion within 12 to 150 / zm is the cathode discharge facing surface 14. Note that, in FIG. 2, the structure of the cathode 10 is shown, and the force anode 20 also has a similar structure.
- the trigger electrode 30 is arranged so as to penetrate the discharge space 50 until the tip 32 of the trigger electrode projects out of the discharge space 50.
- “outside the discharge space” means outside the space defined by the surface facing the cathode discharge and the surface facing the anode discharge. The distance (Gap) within 1Z4.
- the projecting distance of the trigger electrode tip 32 from the discharge space 50 is set to 1 to 200 ⁇ m, preferably 50 to 150 ⁇ m, more preferably 80 to 120 ⁇ m. . Since each radius of the cathode discharge facing surface 14 and the anode discharge facing surface 24 is 100 / zm, when converted to the protruding distance from the center line CL, the protruding distance from the center line CL is 101 to 300 m, preferably. Is set to 150-250 m, more preferably 180-220 m. Further, the trigger electrode 30 is arranged at a distance of 0.4 ⁇ 0.1 mm from the cathode 10.
- a predetermined voltage is applied between the cathode 10 and the anode 20 by a main power supply unit (not shown). Then, a pulse voltage is applied to the spa-force electrode 60, the trigger electrode 30, and the anode 20 by the trigger power supply unit.
- FIG. 4 described above is a diagram for explaining the discharge path of the flash lamp according to the present invention in comparison with the discharge path of the conventional flash lamp.
- region (a) shows the discharge path of the flash lamp according to the present invention
- region (b) shows the discharge path of the conventional flash lamp as described above.
- the electron emission from the cathode 10 varies in the area of the cathode discharge facing surface 14 which is not limited to the cathode tip 12 alone. For this reason, the discharge path also varies with each pulse lighting, resulting in deterioration of light output stability.
- the trigger electrode 30 is positioned such that the trigger electrode tip 32 is located outside the discharge space 50 defined by connecting the cathode discharge facing surface 14 and the anode discharge facing surface 24. Is placed.
- the trigger electrode 30 By arranging the trigger electrode 30 in this manner, as shown in the area (a) in FIG. 4, the discharge path for each pulse lighting is shifted to one side (since the discharge path is limited), Dispersion of the discharge path is reduced. As a result, a flash lamp with improved light output stability can be obtained.
- the area (a) shows a plan view of the vicinity of the trigger electrode 30, and the area (b) shows a side view of the vicinity of the trigger electrode 30 in the area (a).
- the figure and the position of each part are shown so as to correspond.
- the area (c) shows an enlarged view of the discharge space 50 in the area (a)
- the area (d) shows an enlarged view of the discharge space 50 in the area (b). It is shown as corresponding to the figure.
- the arrangement PI associated with each other between the area (c) and the area (d) in FIG. 7 is a trigger electrode arrangement of a conventional lamp, and the trigger electrode tip 32 enters the discharge space 50.
- a trigger electrode 30 (particularly, a float portion) is arranged at the bottom. In this arrangement, the discharge path varies, and the light output stability decreases.
- the trigger electrode 30 (particularly, including the trigger electrode tip 32, like the arrangement P3 associated with the region (c) and the region (d) in FIG. 7) (Float part) is arranged. That is, the trigger electrode 30 is disposed in a state of completely penetrating the discharge space 50 until the trigger electrode tip 32 goes out of the discharge space 50. As a result, the discharge path Variation is effectively suppressed, and a flash lamp with improved light output stability is obtained.
- the effect of improving the light output stability is exhibited by arranging the trigger electrode 30 so that the trigger electrode tip 32 comes out of the discharge space 50.
- the trigger electrode may be arranged such that the float portion including the tip 32 of the trigger electrode does not intersect with the discharge space 50.
- the trigger electrode 30 may be arranged such that the tip 32 of the trigger electrode is located shortly before entering the discharge space 50 as in the arrangement P2 other than the arrangement P3 described above.
- the trigger electrode 30 may be arranged above the discharge space 50 so that the tip 32 of the trigger electrode does not enter the discharge space 50.
- the trigger electrode 30 may be arranged below the discharge space 50 as in arrangement P5.
- the tip of the trigger electrode Since the trigger electrode of the flash lamp is consumed with time due to the discharge of the lamp, the tip of the trigger electrode is not located at the optimum position at the end of the lamp life, and the lighting performance and stability deteriorate. . However, if the trigger electrode is arranged to penetrate the discharge space with the tip part located outside the discharge space, as shown in the arrangement P3 shown in FIGS. 6 and 7, the tip of the trigger electrode The tip of the trigger electrode is located at a position where the light output is relatively stable, even if the power is exhausted or after exhaustion. As a result, a flash lamp having high light output stability until the end of the lamp life can be obtained.
- FIG. 8 is a side view showing an electrode arrangement in a second embodiment of the flash lamp according to the present invention.
- the interval between the cathode 10 and the anode 20 is set to be wide as 3.0 ⁇ 0.3 mm, and two trigger electrodes 30 and 40 are provided accordingly. This is different from the first embodiment.
- Each of the trigger electrodes 30 and 40 is arranged to penetrate the discharge space 50 from the same direction with the trigger electrode tips 32 and 42 positioned outside the discharge space 50.
- the trigger electrode 30 on the cathode 10 side is arranged at a distance of 0.4 ⁇ 0.1 mm from the cathode 10.
- the trigger electrode 40 on the anode 20 side is arranged at a distance of 1.0 ⁇ 0.2 mm from the anode 20.
- both trigger electrodes 30, 40 are arranged to penetrate the discharge space 50 (the trigger electrode tips 32, 42 are located outside the discharge space 50), the lamp life is shortened. A flash lamp capable of maintaining high light output stability from the beginning to the end is obtained.
- at least one tip of the trigger electrode is located outside the discharge space. With such an arrangement, the effects of the present invention can be obtained.
- FIG. 9 is a side view showing an electrode arrangement in a third embodiment of the flash lamp according to the present invention.
- the trigger electrode 30 on the cathode 10 side and the trigger electrode 40 on the anode 20 side are arranged so that the opposite side force also penetrates the discharge space 50 (in this state, the trigger electrode tip 32, 42 protrudes on the opposite sides of the discharge space 50).
- the trigger electrodes protrude through the space from different directions, it is possible to obtain a flash lamp capable of maintaining high light output stability from the beginning to the end of the lamp life.
- the prepared sample has a flash lamp (first sample) with one trigger electrode as shown in Fig. 6 and two trigger electrodes as shown in Fig. 8. Flash lamp (second sample).
- first sample the trigger electrodes as shown in Fig. 6
- second sample the protrusion distances of the trigger electrodes were +0.4 mm, +0.3 mm, +0.2 mm, +0.1 mm, ⁇ Omm, 0.1 mm, 0.2 mm
- the light output stability was measured by changing to 0.3 mm and 0.4 mm.
- the protrusion distance of the trigger electrode in this experiment means the distance from the center line between the cathode and the anode to the tip of the trigger electrode.
- the discharge-facing surfaces of the cathode and anode have a diameter of 200 m.
- the distance between the cathode and anode is 1.5 mm
- the trigger electrode is also arranged at a cathodic force of 0.4 mm.
- the distance between the cathode and anode is 3. Omm (shown as 3. OmmGap in Table 1 and graph G120 in Figure 10).
- one trigger electrode was placed at a distance of 0.4 mm from the cathode, and the other trigger electrode was placed at a distance of 1.0 mm from the anode. Birds The protruding distances of the electrodes are the same.
- the operating conditions for each sample were a supply voltage of 1000 V, a main discharge capacitor of 0.1 F, and a repetition frequency of 100 Hz.
- the number of measurements was 300 flashes for each protrusion distance, and the measurements were performed using silicon PD (Photo Diode).
- the measured data was evaluated by converting the current value from the silicon PD into a voltage.
- the light output stability was evaluated as ⁇ (maximum value ⁇ minimum value) Z average ⁇ ⁇ 100 (%).
- Table 1 shows the measurement results. The measurement results are plotted in Fig. 10.
- FIG. 10 is a graph showing the relationship between the protrusion length of the trigger electrode and the stability of light output. In FIG.
- a graph G110 indicates the light output stability of the first sample, and corresponds to the numerical value shown in the column of 1.5 mmGap in Table 1.
- Graph G120 shows the light output stability of the second sample, which corresponds to the value shown in the column of 3. OmmGap in Table 1.
- the protruding length of the trigger electrode is 0.0mm, that is, the tip of the trigger electrode is between the cathode and the anode.
- the light output stability is relatively poor.
- the protrusion length of the trigger electrode exceeds ⁇ 0.1 mm, that is, when the tip of the trigger electrode is positioned outside the discharge space defined by the cathode discharge facing surface and the anode discharge facing surface, Output stability is improved.
- the light output stability is the best. Therefore, by positioning the tip of the trigger electrode outside the discharge space defined by the discharge facing surfaces of the cathode and the anode, the light output stability of the flash lamp can be improved.
- the flash lamp according to the present invention is applicable to light sources such as spectroscopic analyzers and emission analyzers that require high light output stability.
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- Discharge Lamps And Accessories Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004-096079 | 2004-03-29 | ||
JP2004096079A JP4575012B2 (ja) | 2004-03-29 | 2004-03-29 | フラッシュランプ |
Publications (1)
Publication Number | Publication Date |
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WO2005093786A1 true WO2005093786A1 (ja) | 2005-10-06 |
Family
ID=35056452
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2005/004659 WO2005093786A1 (ja) | 2004-03-29 | 2005-03-16 | フラッシュランプ |
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JP (1) | JP4575012B2 (ja) |
WO (1) | WO2005093786A1 (ja) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP5661375B2 (ja) * | 2010-08-23 | 2015-01-28 | 浜松ホトニクス株式会社 | フラッシュランプ |
US8304973B2 (en) | 2010-08-23 | 2012-11-06 | Hamamatsu Photonics K.K. | Flash lamp |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2977508A (en) * | 1956-07-17 | 1961-03-28 | Edgerton Germeshausen & Grier | Gaseous-discharge device and system |
US3356888A (en) * | 1960-12-27 | 1967-12-05 | Eg & G Inc | Two-electrode spark gap with interposed insulator |
JPS5018184U (ja) * | 1973-06-15 | 1975-02-27 | ||
JPS5528973A (en) * | 1978-08-18 | 1980-02-29 | Dentsply Int Inc | Light source device |
JPS561746B2 (ja) * | 1976-12-03 | 1981-01-14 | ||
JPH03163747A (ja) * | 1989-11-20 | 1991-07-15 | Hamamatsu Photonics Kk | フラッシュランプ |
JPH03269949A (ja) * | 1990-03-20 | 1991-12-02 | Hamamatsu Photonics Kk | 光源装置 |
JPH04106832A (ja) * | 1990-08-24 | 1992-04-08 | Hamamatsu Photonics Kk | Xeフラッシュランプ |
JPH0525168U (ja) * | 1991-09-03 | 1993-04-02 | 臼井国際産業株式会社 | 蓄熱器 |
WO2001003160A1 (fr) * | 1999-06-30 | 2001-01-11 | Hamamatsu Photonics K.K. | Lampe a eclair |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4965078A (ja) * | 1972-10-24 | 1974-06-24 | ||
JPH04126348A (ja) * | 1990-09-17 | 1992-04-27 | Sugawara Kenkyusho:Kk | ストロボ放電管 |
JPH0525168Y2 (ja) * | 1990-09-17 | 1993-06-25 |
-
2004
- 2004-03-29 JP JP2004096079A patent/JP4575012B2/ja not_active Expired - Fee Related
-
2005
- 2005-03-16 WO PCT/JP2005/004659 patent/WO2005093786A1/ja active Application Filing
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2977508A (en) * | 1956-07-17 | 1961-03-28 | Edgerton Germeshausen & Grier | Gaseous-discharge device and system |
US3356888A (en) * | 1960-12-27 | 1967-12-05 | Eg & G Inc | Two-electrode spark gap with interposed insulator |
JPS5018184U (ja) * | 1973-06-15 | 1975-02-27 | ||
JPS561746B2 (ja) * | 1976-12-03 | 1981-01-14 | ||
JPS5528973A (en) * | 1978-08-18 | 1980-02-29 | Dentsply Int Inc | Light source device |
JPH03163747A (ja) * | 1989-11-20 | 1991-07-15 | Hamamatsu Photonics Kk | フラッシュランプ |
JPH03269949A (ja) * | 1990-03-20 | 1991-12-02 | Hamamatsu Photonics Kk | 光源装置 |
JPH04106832A (ja) * | 1990-08-24 | 1992-04-08 | Hamamatsu Photonics Kk | Xeフラッシュランプ |
JPH0525168U (ja) * | 1991-09-03 | 1993-04-02 | 臼井国際産業株式会社 | 蓄熱器 |
WO2001003160A1 (fr) * | 1999-06-30 | 2001-01-11 | Hamamatsu Photonics K.K. | Lampe a eclair |
Also Published As
Publication number | Publication date |
---|---|
JP2005285468A (ja) | 2005-10-13 |
JP4575012B2 (ja) | 2010-11-04 |
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