KR101313513B1 - Short arc type discharge lamp - Google Patents
Short arc type discharge lamp Download PDFInfo
- Publication number
- KR101313513B1 KR101313513B1 KR1020100059627A KR20100059627A KR101313513B1 KR 101313513 B1 KR101313513 B1 KR 101313513B1 KR 1020100059627 A KR1020100059627 A KR 1020100059627A KR 20100059627 A KR20100059627 A KR 20100059627A KR 101313513 B1 KR101313513 B1 KR 101313513B1
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- KR
- South Korea
- Prior art keywords
- insert
- anode
- tip
- discharge lamp
- type discharge
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/84—Lamps with discharge constricted by high pressure
- H01J61/86—Lamps with discharge constricted by high pressure with discharge additionally constricted by close spacing of electrodes, e.g. for optical projection
-
- 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
- H01J61/06—Main electrodes
- H01J61/073—Main electrodes for high-pressure discharge lamps
- H01J61/0732—Main electrodes for high-pressure discharge lamps characterised by the construction of the electrode
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- Discharge Lamp (AREA)
Abstract
The present invention relates to a short-arc discharge lamp in which a pair of cathodes and anodes are disposed opposite to each other in a light tube, in particular, full standby lighting that repeats normal lighting at rated power and standby lighting lighting at a smaller power than this. Also in the city, the electrode structure is provided so that the center portion of the anode tip does not protrude from the peripheral annular portion thereof and the blackening of the lamp due to evaporation of the electrode material does not occur.
Between the tip center part of a positive electrode tip, and a peripheral annular part, the buffer material which consists of a material with a yield stress smaller than an electrode material is interposed, and the thermal stress of the tip center part is alleviated with this buffer material, It is characterized by the above-mentioned.
Description
TECHNICAL FIELD This invention relates to a short arc type discharge lamp. Specifically, It is related with the short arc type discharge lamp applied to the light source for exposures, such as the manufacturing field of a semiconductor and a liquid crystal, and the light source for backlight of a projector.
The short arc type discharge lamp is used as a light source for an exposure apparatus or a backlight of a projector by combining with an optical system because the distal end distance of the pair of electrodes disposed in the light emitting tube is short and close to the point light source.
Japanese Patent Laid-Open No. 10-188890 discloses a conventional short arc type discharge lamp.
The conventional short arc type discharge lamp is shown in FIG. 7, The
In recent years, however, in the short arc type discharge lamp used in the manufacturing process of a semiconductor or a liquid crystal panel, as shown in Japanese Patent Laid-Open No. 2000-181075, the lamp is always lit with a constant power to save power. The lighting method is to turn on (normal lighting) at rated power only during exposure, and to turn on (standby lighting) at a minimum power smaller than the rated power when waiting for substrate movement, etc. (hereinafter referred to as full standby lighting). Is adopted.
For example, it is repeated to light 0.1-10 second at rated power at the time of exposure, and to light 0.1-100 second at standby power smaller than rated power at the time of standby.
By the way, when the lamp is turned on or off, or when the input power is changed at the time of full standby lighting, the heat flux flowing from the arc to the anode changes, so that the anode temperature changes, and the anode has an internal stress. Occurs.
At this time, as shown to FIG.8 (A), (B), the
Therefore, the
Such projection remains even after the temperature at the tip of the anode is stabilized at the rated lighting time, without returning to the original shape completely. In addition, in the case of the full standby lighting in particular, such deformation occurs repeatedly, and the protrusions accumulate and enlarge.
Then, the discharge concentrates on the enlarged protrusion, the protrusion abnormally overheats, the electrode material evaporates, adheres to the inner wall of the light emitting tube, and the inner wall of the light emitting tube is blackened, causing a rapid decrease in illuminance.
The problem to be solved by the present invention is to solve the problems of the prior art, in particular, in a short arc discharge lamp employing a full standby lighting method, to reduce the thermal stress generated at the tip of the anode, the center portion of the tip of the anode It is an object of the present invention to provide a short arc type discharge lamp having an anode structure capable of preventing this deformation and preventing blackening.
In order to solve the said subject, the short arc type discharge lamp which concerns on this invention interposed the buffer material which consists of metal whose yield stress is smaller than the anode material between the center part of the tip of the anode, and the peripheral annular part of the anode. .
The tip end portion is formed of an insert separate from the anode, and the insert is inserted through the buffer member in an opening formed in the anode tip surface.
In addition, the cushioning material is made of a metal foil, and is wound around the insert.
The insert is composed of a ring-shaped first insert and a second insert inserted through the cushioning material through the first insert.
The inner peripheral surface of the ring-shaped first insert is characterized in that there is a crack extending radially on the tip surface of the anode.
The ring-shaped first insert is divided into a plurality of pieces.
The opening is a through hole penetrating to the rear end of the anode, the insert is made of an electrode shaft, the electrode shaft is inserted into the through hole, and the front end thereof faces the front end surface of the electrode.
An annular opening is formed in the distal end surface of the anode to form the distal end portion and the peripheral annular portion, and a buffer material made of sintered metal is interposed in the annular opening.
Moreover, the relief groove | channel of the said metal foil is formed in at least one of the inner surface of the said opening, or the outer surface of the said insert. It is characterized by the above-mentioned.
Moreover, the said relief groove is formed in the circumferential direction, It is characterized by the above-mentioned.
Moreover, the said relief groove is formed in the axial direction, It is characterized by the above-mentioned.
According to the short arc type discharge lamp of the present invention, a buffer material made of a metal having a lower yield stress than that of the anode material is interposed between the tip center portion of the anode and the peripheral annular portion thereof, and therefore, particularly at the time of full standby lighting. Even if the temperature is changed, the thermal deformation of the tip center portion is absorbed by the buffer material, so that the phenomenon of deformation and protrusion does not occur. As a result, the tip center portion is not abnormally overheated and blackening of the light emitting tube does not occur.
Further, even when the cushioning material is plastically deformed by thermal expansion, since a relief groove is formed in at least one of the insert and the opening, the expanded portion of the cushioning material penetrates into the relief groove and protrudes from the tip end surface of the anode. Since this part is not abnormally overheated, blackening of the light emitting tube does not occur.
BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing of the principal part of the front-end | tip of the anode of 1st Example of the short arc type discharge lamp which concerns on this invention.
2 is a sectional view of principal parts of a second embodiment;
3 is a sectional view of principal parts of a third embodiment;
4 is a sectional view of principal parts of a fourth embodiment;
5 is a sectional view of principal parts of a fifth embodiment;
6 is a sectional view of principal parts of a sixth embodiment;
7 is a general view of the prior art.
FIG. 8 is an explanatory diagram of the main parts of FIG. 7; FIG.
9 is a sectional view of principal parts of the positive electrode of the seventh embodiment;
10 is an enlarged cross-sectional view of the distal end of FIG. 9;
11 is a sectional view of principal parts of the eighth embodiment;
12 is a sectional view of principal parts of a ninth embodiment;
13 is a graph showing the effect of the present invention
1: is sectional drawing of 1st Example, (A) is insertion sectional drawing, (B) is explanatory drawing of an insertion process.
In the figure, an opening 34 opening in the tip end surface is formed in the center portion of the
Specifically, an
The
By doing so, when the
As a result, the
Therefore, even when the lamp is turned on or off or the full standby lighting for a long time, local projection of the center portion of the anode tip can be prevented, and evaporation of the anode material and the resulting decrease in roughness can be suppressed.
2 is a cross-sectional view of the second embodiment, (A) is an insertion cross-sectional view, (B) is an explanatory diagram of an insertion step.
In this embodiment, the
The
The
According to this embodiment, since the two
3 is a sectional view of the third embodiment, (A) is an insertion sectional view, and (B) is a bottom view of the main portion thereof.
In the figure, a plurality of
Such a
In the argon atmosphere (1 atm), the anode was thermally shocked by discharging for 10 seconds for 1 second at 200 A for 1 second (0.5 Hz) for 10 seconds and causing a crack (crack).
By the above discharge, the inner
The
According to this embodiment, when the tip central portion of the
In addition, since the
4 is a sectional view of the fourth embodiment, (A) is an insertion sectional view, and (B) is a bottom view of the main portion thereof.
In this embodiment, the
According to this embodiment, the troublesome work of creating the
5 is a cross-sectional view of the fifth embodiment, wherein the opening formed in the leading end center portion of the
According to this embodiment, since the
In addition, in the Example of FIGS. 1-5, although the
FIG. 6: is a 6th Example, (A) is insertion sectional drawing, (B) is the bottom view.
In this embodiment, an
According to this embodiment, the insert of the separate body inserted into the distal end portion of the
In order to compare this invention and the conventional anode, the lighting test with respect to the illumination intensity retention based on Example 1 was done.
The lamp used for the experiment has the amount of 30 mg / cc of encapsulated mercury and the size of the positive electrode having an outer diameter of 25 mm, a total length of 40 mm, and a front end surface of 10 mm.
The diameter D of the
Lighting conditions and evaluation
The lighting cycle of 5 sec at 50 kV and 50 sec at 3 kW was repeated, and the height of tip part: tip protrusion amount (mm) in the anode tip surface after lighting for 500 hours was evaluated.
Moreover, illuminance retention ratio computed the illumination intensity retention after lighting for 500 hours on the basis of the ultraviolet illuminance of wavelength 365nm (i line) at the time of lighting start in the same lighting conditions.
In the lamp of the present invention, the diameters of the openings formed at the tips of the anodes of the lamps were evaluated to be 3 mm, 6 mm, and 8 mm.
Table 1 shows the results of these experiments.
As can be seen from Table 1, the amount of protrusion of the tip of the anode after lighting for 500 hours was 0.94 mm in the conventional electrode, and decreased to 0.41 to 0.72 mm in the electrode of the present invention. Significant improvements were made from 89% to 86%.
As described above, the short arc discharge lamp according to the present invention interposed a buffer material made of a metal having a lower yield stress than the anode material between the center portion of the positive electrode and the peripheral annular portion thereof. Even when the lighting method is adopted, the center portion of the tip of the anode is heated and does not protrude locally, but it is possible to suppress the decrease in illuminance caused by evaporation of the anode material as the center portion protrudes and the blackening of the light emitting tube resulting therefrom. Effect.
Next, a seventh embodiment of the present invention will be described. This example is an application example in the case where the shock absorbing material is a metal foil.
9 is a cross-sectional view of the seventh embodiment, (A) is an insertion cross-sectional view, (B) is an explanatory diagram of an insertion step.
In the figure, the
Specifically, an
The
And the
By doing so, when the
As a result, the
In addition, as shown in FIG. 10, even when the
Therefore, even if the lamp is turned on or off, or the full standby lighting for a long time, local projection of the center portion of the anode tip is prevented, and the evaporation of the anode material is suppressed, and the projection from the anode tip surface of the buffer material is also prevented, and the evaporation of the buffer material is prevented. Since it can suppress, the fall of the roughness accompanying evaporation of these materials can be suppressed largely.
In the above embodiment, although the
Also in this embodiment, the
In the embodiment shown in FIGS. 1 to 3 above, the
Also in this example, the thermal expansion component of the
Of course, also in this case, the
The
In the molding of the relief groove, in the case of the relief groove of the outer surface of the
The cross-sectional shape of the relief groove may be any one of a triangle, a trapezoid, a circle, or a combination thereof.
In order to compare the positive electrode of the present invention with the conventional positive electrode and the positive electrode of the comparative example, the lighting test for the amount of tip protrusion and roughness retention of the positive electrode based on Example 1 as the positive electrode of the present invention, and the positive electrode according to the prior art and the comparative example Done.
The lamp used for the experiment was a sealed mercury amount of 30 mg / cc, and the positive electrode had a diameter of 25 mm, a total length of 40 mm, and a diameter of a front end surface of 8 mm.
And the
·anode
Positive electrode A of the present invention: An electrode in which a
Anode B of Comparative Example: An electrode without a relief groove in the
Anode C of the prior art: An electrode having an integrated shape without an insert. (See Fig. 8).
Lighting conditions and evaluation
The lighting cycle of 6 sec at 26 kW and 26 sec at 2 kW of input power was repeated, and the height of tip part: tip protrusion amount (mm) in the anode tip surface after lighting for 500 hours was evaluated.
Moreover, illuminance retention ratio computed the illumination intensity retention after lighting for 500 hours on the basis of the ultraviolet illuminance of wavelength 365nm (i line) at the time of lighting start in the same lighting conditions.
Table 2 below and the roughness retention rate of the above experimental results are shown in FIG. 13.
As can be seen from Table 2, although the protrusion amount of the tip of the anode after lighting for 500 hours was 0.94 mm in the anode C of the conventional example, it was improved to 0.41 mm in the anode B of the comparative example, but this was further improved in the anode A of the present invention. It can be seen that the width is greatly reduced to 0.2 mm.
As a result, as shown in Table 2 and FIG. 13, the roughness retention of the i line was improved from 86% of the positive electrode C of the conventional example to 92% of the positive electrode B of the comparative example, but this was 96% in the positive electrode A of the present invention. More significant improvements are taking place.
As described above, the short arc discharge lamp according to the present invention is inserted into an opening formed in the center portion of the tip of the anode via a buffer material made of a metal having a lower yield stress than the anode material. The relief groove of the cushioning material is formed in at least one of the inner surface of the opening of the anode or the outer surface of the insert, so that the center portion of the tip of the anode is heated even when the full standby lighting method is adopted. Even if the buffer material inserted between the insert and the anode opening is thermally expanded, evaporation of the anode material as the center portion protrudes and a decrease in illuminance caused by blackening of the light emitting tube caused by the projection of the center portion are suppressed. Since the expanded matter penetrates into the relief groove and is absorbed and does not protrude from the tip surface of the anode, It shows an effect that the buffer material can be prevented from abnormally overheating and evaporating.
21: cathode 31: anode
32: electrode shaft 33: anode front end surface
34
36: shock absorber 37: first insert
38:
43: crack 44: gap
45 through
47: cushioning material
60: relief groove in the circumferential direction of the insert
61: relief groove in the circumferential direction of the opening
62: relief groove in the axial direction of the insert
Claims (11)
An opening is formed in the center portion of the tip, which is an end portion of the anode that is opposite to the cathode, and an insert separate from the anode is inserted in the opening, and the insert includes tantalum, molybdenum, niobium, rhenium, or the like. A short arc type discharge lamp comprising a buffer material made of a metal having a lower yield stress than the anode material.
A short arc type discharge lamp, characterized in that the buffer member is made of metal foil and wound around the insert.
And the insert comprises a ring-shaped first insert and a second insert inserted into the first insert via a cushioning material.
A short arc-type discharge lamp, characterized in that the inner peripheral surface of the ring-shaped first insert has a crack extending radially on the tip surface of the anode.
A short arc-type discharge lamp, characterized in that the ring-shaped first insert is divided into a plurality of pieces.
The opening is a through hole penetrating to the rear end of the anode, and the insert is made of an electrode shaft, the electrode shaft is inserted into the through hole, and the tip end thereof faces the tip surface of the electrode body. Type discharge lamp.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JPJP-P-2009-165272 | 2009-07-14 | ||
JP2009165272A JP5170573B2 (en) | 2009-07-14 | 2009-07-14 | Short arc type discharge lamp |
JPJP-P-2010-029968 | 2010-02-15 | ||
JP2010029968A JP4900491B2 (en) | 2010-02-15 | 2010-02-15 | Short arc type discharge lamp |
Publications (2)
Publication Number | Publication Date |
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KR20110006605A KR20110006605A (en) | 2011-01-20 |
KR101313513B1 true KR101313513B1 (en) | 2013-10-01 |
Family
ID=43382961
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020100059627A KR101313513B1 (en) | 2009-07-14 | 2010-06-23 | Short arc type discharge lamp |
Country Status (4)
Country | Link |
---|---|
KR (1) | KR101313513B1 (en) |
CN (1) | CN101958221B (en) |
DE (1) | DE102010026991B4 (en) |
TW (1) | TWI412057B (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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US10370539B2 (en) | 2014-01-30 | 2019-08-06 | Monolith Materials, Inc. | System for high temperature chemical processing |
US11939477B2 (en) | 2014-01-30 | 2024-03-26 | Monolith Materials, Inc. | High temperature heat integration method of making carbon black |
CA2937909C (en) * | 2014-01-31 | 2023-09-19 | Monolith Materials, Inc. | Plasma torch design |
BR112017016692A2 (en) | 2015-02-03 | 2018-04-10 | Monolith Materials, Inc. | method and apparatus for regenerative cooling |
MX2018013161A (en) | 2016-04-29 | 2019-06-24 | Monolith Mat Inc | Torch stinger method and apparatus. |
CA3055830A1 (en) | 2017-03-08 | 2018-09-13 | Monolith Materials, Inc. | Systems and methods of making carbon particles with thermal transfer gas |
CN109427519A (en) * | 2017-08-28 | 2019-03-05 | 深圳凯世光研股份有限公司 | A kind of the recycling and reusing method and its anode electrode of short arc discharge lamp anode electrode |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH11219683A (en) * | 1997-11-11 | 1999-08-10 | Patent Treuhand Ges Elektr Gluehlamp Mbh | Electrode component for discharge lamp and lamp with electrode component |
JP2000215845A (en) | 1999-01-26 | 2000-08-04 | Hamamatsu Photonics Kk | Electrode for discharge tube and discharge tube using the same |
JP2001319615A (en) | 2000-05-11 | 2001-11-16 | Ushio Inc | Cathode for discharge lamp and its manufacturing method |
JP2004111235A (en) * | 2002-09-19 | 2004-04-08 | Ushio Inc | Discharge lamp |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2915368B2 (en) | 1996-12-25 | 1999-07-05 | ウシオ電機株式会社 | Short arc mercury lamp |
JP2000181075A (en) | 1998-12-11 | 2000-06-30 | Ushio Inc | Lamp illumination control method of exposure device |
JP3363816B2 (en) * | 1999-01-26 | 2003-01-08 | 浜松ホトニクス株式会社 | Discharge tube electrode and discharge tube using the same |
JP3953675B2 (en) * | 1999-03-08 | 2007-08-08 | 新日本無線株式会社 | Discharge tube |
JP3614042B2 (en) * | 1999-07-05 | 2005-01-26 | ウシオ電機株式会社 | Discharge lamp |
ES2267589T3 (en) * | 1999-11-11 | 2007-03-16 | Koninklijke Philips Electronics N.V. | HIGH PRESSURE DISCHARGE LAMP. |
JP2007242469A (en) * | 2006-03-09 | 2007-09-20 | Ushio Inc | Discharge lamp |
JP4797790B2 (en) * | 2006-05-22 | 2011-10-19 | ウシオ電機株式会社 | Discharge lamp |
DE102006023970A1 (en) * | 2006-05-22 | 2007-11-29 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | Electrode for a discharge lamp and a method for producing such an electrode |
JP4914970B2 (en) * | 2007-01-31 | 2012-04-11 | 株式会社ユメックス | Discharge lamp electrode and manufacturing method thereof |
JP5165413B2 (en) * | 2007-05-08 | 2013-03-21 | 株式会社オーク製作所 | Electrode structure for discharge lamp |
JP5009062B2 (en) * | 2007-06-22 | 2012-08-22 | 株式会社オーク製作所 | Electrode structure for discharge lamp |
-
2010
- 2010-06-07 TW TW99118385A patent/TWI412057B/en not_active IP Right Cessation
- 2010-06-23 KR KR1020100059627A patent/KR101313513B1/en active IP Right Grant
- 2010-07-07 CN CN201010224850.1A patent/CN101958221B/en not_active Expired - Fee Related
- 2010-07-13 DE DE102010026991.3A patent/DE102010026991B4/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH11219683A (en) * | 1997-11-11 | 1999-08-10 | Patent Treuhand Ges Elektr Gluehlamp Mbh | Electrode component for discharge lamp and lamp with electrode component |
JP2000215845A (en) | 1999-01-26 | 2000-08-04 | Hamamatsu Photonics Kk | Electrode for discharge tube and discharge tube using the same |
JP2001319615A (en) | 2000-05-11 | 2001-11-16 | Ushio Inc | Cathode for discharge lamp and its manufacturing method |
JP2004111235A (en) * | 2002-09-19 | 2004-04-08 | Ushio Inc | Discharge lamp |
Also Published As
Publication number | Publication date |
---|---|
CN101958221A (en) | 2011-01-26 |
CN101958221B (en) | 2014-10-15 |
KR20110006605A (en) | 2011-01-20 |
DE102010026991A1 (en) | 2011-01-20 |
TW201112303A (en) | 2011-04-01 |
DE102010026991B4 (en) | 2016-05-12 |
TWI412057B (en) | 2013-10-11 |
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