JPH0530281Y2 - - Google Patents
Info
- Publication number
- JPH0530281Y2 JPH0530281Y2 JP4959389U JP4959389U JPH0530281Y2 JP H0530281 Y2 JPH0530281 Y2 JP H0530281Y2 JP 4959389 U JP4959389 U JP 4959389U JP 4959389 U JP4959389 U JP 4959389U JP H0530281 Y2 JPH0530281 Y2 JP H0530281Y2
- Authority
- JP
- Japan
- Prior art keywords
- lead rod
- internal lead
- light emitting
- space surrounding
- emitting space
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 42
- 239000011521 glass Substances 0.000 claims description 10
- 239000011888 foil Substances 0.000 claims description 9
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 8
- 229910052753 mercury Inorganic materials 0.000 description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Description
〔産業上の利用分野〕
本考案は、例えば、光化学産業分野、半導体デ
バイスの製造分野、照明分野等に用いられるシヨ
ートアーク型放電灯に関し、特に点灯時の内部圧
力が８気圧以上になる超高圧水銀灯やキセノン放
電灯に関するものである。
〔従来の技術〕
例えば、半導体の製造に使用される超高圧水銀
灯は、定常点灯状態において30気圧以上になり、
この内部圧力の高さはしばしば放電灯の製造時に
ガラスに歪みが残つていたり、発光管に極端に弱
い部分が存在するとガラスにクラツクがはいり、
このクラツク部分から放電灯が破裂することがあ
り、非常に危険である。
放電灯はその給電部材により、箔シール構造の
ものとロツドシール構造のものがあるが、超高圧
水銀灯の場合は、水銀の蒸発が妨げられないよう
に箔シール構造がとられることが多い。箔シール
構造を採用して構成した超高圧水銀灯の一例を第
３図に基づいて説明すると、中央に発光空間囲繞
部１１が形成されたガラス製発光管１の両端に伸
びる封じ管部１２内には、内端側に内部リード棒
保持筒体７が溶着され、外端側には開口部を外側
にして有底筒体２が埋設されている。そしてこの
有底筒体２の外周面には、金属箔３が配設されて
おり、有底筒体２内に挿入された外部リード棒５
および内部リード棒保持筒体７内に挿入された内
部リード棒４と電気的に接続され、内部リード棒
４の先端には電極６が取り付けられて発光空間囲
繞部１１内で対向配置されている。そして、内部
リード棒保持筒体７の先端は発光空間囲繞部１１
内に若干突出するか面一に構成されている。
〔考案が解決しようとする課題〕
前記した構成をとる従来の高圧水銀蒸気放電灯
は、発光空間囲繞部１１内の圧力が30気圧以上に
なるが、定格消費電力が2KWの超高圧水銀灯の
場合は、発光空間囲繞部１１の内径も70mm程度と
大きくなり、この高圧が発光空間囲繞部１１の全
内面に作用して、内部リード棒保持筒体７と発光
空間囲繞部１１との境目に形成される溶着部分８
に内部応力がかかり、内部リード棒保持筒体７が
溶着された封じ管部１２にクラツクが発生すると
いう問題点があつた。
本考案は、以上のような従来技術の有する問題
点に鑑みて成されたものであり、その目的とする
ところは、内部リード棒保持筒体と発光管の溶着
部分にかかる内部応力が軽減できて、封じ管部に
クラツクのはいることのない放電灯を提供するこ
とにある。
〔課題を解決するための手段〕
本考案の放電灯は、中央の略球形状をした発光
空間囲繞部およびこれより両端に伸びる封じ管部
よりなるガラス製発光管と、このガラス製発光管
の封じ管部の内部においてその開口端部が当該封
じ管部の外端側に向かうよう配置されたガラス製
の有底筒体と、この有底筒体の筒孔内に挿入され
た外部リード棒と、前記有底筒体の底壁端面から
前記発光空間囲繞部内に伸びるよう配置された内
部リード棒と、この内部リード棒の先端に設けら
れた電極と、前記封じ管部の内部において前記有
底筒体の底壁外方に位置され、前記内部リード棒
をその内部に挿通した状態で保持するガラス製の
内部リード棒保持筒体と、前記有底筒体の外周に
おいてその筒軸方向に伸び、その一端側が前記内
部リード棒に電気的に接続され、その他端側が前
記外部リード棒に電気的に接続された帯状の金属
箔とを有し、前記発光空間囲繞部の内径が前記内
部リード棒保持筒体の外径の２倍以上である放電
灯において、前記内部リード棒保持用筒体と発光
空間囲繞部との間に封じ管部に続く直管部を設
け、この直管部の長さをＬ、内径をＤ、管の肉厚
をｔとするとき、該直管部が以下の関係式を満足
させることを特徴とする。
Ｌ≧√・／２
〔作用〕
封じ管部に溶着される内部リード棒保持筒体と
発光空間囲繞部との間に封じ管部に続く直管部を
設け、この直管部の長さＬと直径Ｄと肉厚ｔとの
関係を特定の条件としたので、後述する実験結果
からも明らかなようにクラツクの発生を防止する
ことができる。この原因は、内部リード棒保持筒
体が発光空間囲繞部内に突出するか面一の場合
は、溶着部にかかる内部応力は球体にかかる応力
と見倣すことができるのにたいして、本考案の場
合は直管部の長さをある程度以上長くすることに
より無限の円筒にかかる内部応力とみなすことが
できる。そして発光空間囲繞部の内径が直管部の
内径の２倍以上である放電灯は、溶着部にかかる
内部応力を数分の一に減少させることができ、そ
の結果溶着部分にクラツクが発生するのを防止す
ることができる。
〔実施例〕
以下本考案の実施例を図面に基づいて詳細に説
明する。
第１図は本考案に係わる一実施例の説明図であ
り、１は石英ガラス製の発光管、２は同じく石英
ガラス製の有底筒体、３はモリブデン製の金属
箔、４はタングステン製の内部リード棒、５はタ
ングステン製の外部リード棒、６は電極、７は石
英ガラス製の内部リード棒保持筒体である。
発光管１は、中央に略球形状をした発光空間囲
繞部１１およびその両端に伸びる小径の封じ管部
１２とよりなり、封じ管部１２内には、外端側に
有底筒体２と、内端側に内部リード棒保持筒体７
が配置され、有底筒体２は、その開口端部が封じ
管部１２の外端側に向くように配置されている。
内部リード棒保持筒体７は第２図に拡大して示す
ように、発光空間囲繞部１１側の内端部がこの発
光空間囲繞部１１内に突出しておらず、発光空間
囲繞部１１との間に直管部１３が形成されてお
り、この直管部１３は長さをＬ、直径をＤ、直管
部の肉厚をｔとしたとき次の関係式を満足するも
のである。
Ｌ≧√・／２
直管部Ｌを上式の関係にすることにより、この
直管部は無限円筒とみなすことができ、無限円筒
の場合半径r1、肉厚ｔ、内部圧力をＰとすると、
応力σ1は
σ1＝r1・Ｐ／ｔ
であり、球の場合は直径をr2とすると、応力σ2は
σ2＝r2・Ｐ／2t
である。即ち、肉厚ｔが同一の場合は
r2＞2r1
であれば、円筒にかかる応力は球にかかる応力よ
り小さくなる。
外部リード棒５はそれぞれその一端側が有底筒
体２の筒孔内に挿入され、内部リード棒４は有底
筒体２の底壁端面に配置された金属円板４１から
発光空間囲繞部１１内に伸びるように配置され、
先端に電極６が取り付けられ、内部リード棒保持
筒体７で保持されている。有底筒体２の外周には
金属箔３が軸線に沿つて伸びるよう配置され、一
端側が屈曲されて金属円板４１に接続され、他端
側が屈曲して外部リード棒５に接続されている。
以上の実施例によると、内部リード棒保持筒体
７と発光空間囲繞部１１の間に直管部１３を設け
て、この直管部１３の長さＬと、内径Ｄと、肉厚
ｔとの関係をＬ≧√・／２としたので、発光
空間囲繞部の内径と直管部の内径の比が２倍以上
で、発光空間囲繞部１１が30気圧以上の高圧にな
つても、内部リード棒保持筒体７と封じ管部１２
との溶着部分にかかる内部応力を減少させること
ができるので、溶着部分からクラツクが発生して
放電灯が破裂するのを防止することができる。
〔実施例〕
内部リード棒保持筒体と発光空間囲繞部との間
の直管部の長さを種々変えた定格出力2KWの超
高圧放電灯をそれぞれ10本製作して点灯実験を行
い、クラツクの発生の有無をしらべた。結果を表
−１に示す。
[Industrial Application Fields] The present invention relates to short arc discharge lamps used in the photochemical industry, semiconductor device manufacturing, lighting, etc., and particularly to ultra-high pressure mercury lamps with an internal pressure of 8 atmospheres or more when lit. and xenon discharge lamps. [Prior art] For example, an ultra-high pressure mercury lamp used in the manufacture of semiconductors has a pressure of 30 atmospheres or more in a steady state of operation.
This high internal pressure often causes cracks in the glass if there is distortion left in the glass during the manufacturing of the discharge lamp, or if there is an extremely weak part in the arc tube.
The discharge lamp may explode from this cracked part, which is extremely dangerous. There are two types of discharge lamps, one with a foil seal structure and the other with a rod seal structure, depending on the power supply member, but in the case of ultra-high-pressure mercury lamps, a foil seal structure is often used so that the evaporation of mercury is not hindered. An example of an ultra-high pressure mercury lamp constructed using a foil seal structure will be explained based on FIG. An internal lead rod holding cylinder 7 is welded to the inner end, and a bottomed cylinder 2 is buried in the outer end with the opening facing outward. A metal foil 3 is disposed on the outer peripheral surface of the bottomed cylinder 2, and an external lead rod 5 is inserted into the bottomed cylinder 2.
The inner lead rod 4 is electrically connected to the inner lead rod 4 inserted into the inner lead rod holding cylinder 7, and an electrode 6 is attached to the tip of the inner lead rod 4, and the electrodes 6 are arranged to face each other in the light emitting space surrounding section 11. . The tip of the internal lead rod holding cylinder 7 is connected to the light emitting space surrounding part 11.
It either protrudes slightly inward or is flush with the surface. [Problem to be solved by the invention] In the conventional high-pressure mercury vapor discharge lamp with the above-mentioned configuration, the pressure inside the light-emitting space surrounding portion 11 is 30 atmospheres or more, but in the case of an ultra-high-pressure mercury lamp with a rated power consumption of 2KW. In this case, the inner diameter of the light emitting space surrounding part 11 is also increased to about 70 mm, and this high pressure acts on the entire inner surface of the light emitting space surrounding part 11, forming a boundary between the internal lead rod holding cylinder 7 and the light emitting space surrounding part 11. welded part 8
There was a problem in that internal stress was applied to the tube and cracks occurred in the sealed tube portion 12 to which the internal lead rod holding cylinder 7 was welded. The present invention was developed in view of the problems of the prior art as described above, and its purpose is to reduce the internal stress applied to the welded portion of the internal lead rod holding cylinder and the arc tube. Therefore, it is an object of the present invention to provide a discharge lamp that does not cause cracks in the sealed tube portion. [Means for Solving the Problems] The discharge lamp of the present invention includes a glass arc tube consisting of a central roughly spherical light emitting space surrounding portion and sealed tube portions extending from this to both ends, and the glass arc tube. A bottomed glass cylinder arranged inside the sealed tube so that its open end faces toward the outer end of the sealed tube, and an external lead rod inserted into the cylindrical hole of the bottomed cylinder. an internal lead rod disposed to extend from the end surface of the bottom wall of the bottomed cylinder into the light emitting space surrounding section; an electrode provided at the tip of the internal lead rod; and an electrode provided inside the sealed tube section. an internal lead rod holding cylinder made of glass that is located outside the bottom wall of the bottom cylinder and holds the internal lead rod in a state where it is inserted therein; a strip-shaped metal foil extending from the inner lead and having one end electrically connected to the inner lead and the other end electrically connected to the outer lead, the inner diameter of the light emitting space surrounding portion being connected to the inner lead. In a discharge lamp whose outer diameter is more than twice the outer diameter of the rod-holding cylinder, a straight pipe part that continues to the sealed pipe part is provided between the internal lead rod-holding cylinder and the light emitting space surrounding part, and the straight pipe part of the straight pipe part is The straight pipe portion is characterized in that it satisfies the following relational expression, where L is the length, D is the inner diameter, and t is the wall thickness of the pipe. L≧√・/2 [Function] A straight pipe part continuing to the sealed pipe part is provided between the internal lead rod holding cylinder welded to the sealed pipe part and the light emitting space surrounding part, and the length of this straight pipe part is L. Since the relationship between the diameter D and the wall thickness t is set to a specific condition, it is possible to prevent the occurrence of cracks, as is clear from the experimental results described later. The reason for this is that if the internal lead rod holding cylinder protrudes into the light-emitting space surrounding part or is flush with it, the internal stress applied to the welded part can be considered to be the stress applied to the sphere, whereas in the case of the present invention, can be regarded as the internal stress applied to an infinite cylinder by increasing the length of the straight pipe part beyond a certain degree. In addition, discharge lamps in which the inner diameter of the light-emitting space surrounding part is more than twice the inner diameter of the straight tube part can reduce the internal stress applied to the welded part to a fraction of that, and as a result, cracks will occur in the welded part. can be prevented. [Example] Hereinafter, an example of the present invention will be described in detail based on the drawings. FIG. 1 is an explanatory diagram of one embodiment of the present invention, in which 1 is an arc tube made of quartz glass, 2 is a cylinder with a bottom also made of quartz glass, 3 is a metal foil made of molybdenum, and 4 is made of tungsten. 5 is an internal lead rod, 5 is an external lead rod made of tungsten, 6 is an electrode, and 7 is an internal lead rod holding cylinder made of quartz glass. The arc tube 1 consists of a substantially spherical light emitting space surrounding part 11 in the center and a small-diameter sealed tube part 12 extending to both ends thereof. Inside the sealed tube part 12, there is a bottomed cylinder 2 at the outer end. , an internal lead rod holding cylinder 7 on the inner end side
The bottomed cylindrical body 2 is disposed such that its open end faces toward the outer end of the sealed tube portion 12.
As shown in an enlarged view in FIG. 2, the inner end of the internal lead rod holding cylinder 7 on the side of the light emitting space surrounding section 11 does not protrude into the light emitting space surrounding section 11, and is not connected to the light emitting space surrounding section 11. A straight pipe section 13 is formed in between, and this straight pipe section 13 satisfies the following relational expression, where L is the length, D is the diameter, and t is the wall thickness of the straight pipe section. L≧√・/2 By setting the straight pipe part L to the above equation, this straight pipe part can be regarded as an infinite cylinder, and in the case of an infinite cylinder, the radius r 1 , the wall thickness t, and the internal pressure are P. Then,
The stress σ 1 is σ 1 =r 1 ·P/t, and in the case of a sphere, if the diameter is r 2 , the stress σ 2 is σ 2 =r 2 ·P/2t. That is, if r 2 >2r 1 when the wall thickness t is the same, the stress applied to the cylinder is smaller than the stress applied to the sphere. One end of each of the external lead rods 5 is inserted into the cylindrical hole of the bottomed cylindrical body 2, and the internal lead rod 4 is inserted into the light emitting space surrounding portion 11 from a metal disk 41 disposed on the end face of the bottom wall of the bottomed cylindrical body 2. arranged to extend inward,
An electrode 6 is attached to the tip and held by an internal lead rod holding cylinder 7. A metal foil 3 is arranged around the outer periphery of the bottomed cylinder 2 so as to extend along the axis, one end is bent and connected to the metal disk 41, and the other end is bent and connected to the external lead rod 5. . According to the above embodiment, the straight pipe part 13 is provided between the internal lead rod holding cylinder 7 and the light emitting space surrounding part 11, and the length L, inner diameter D, and wall thickness t of this straight pipe part 13 are Since the relationship L≧√・/2 is set, even if the ratio of the inner diameter of the light emitting space surrounding part to the inner diameter of the straight pipe part is more than twice, and the light emitting space surrounding part 11 is at a high pressure of 30 atmospheres or more, the internal Lead rod holding cylinder 7 and sealed tube part 12
Since the internal stress applied to the welded portion can be reduced, it is possible to prevent the discharge lamp from bursting due to cracks occurring at the welded portion. [Example] Ten ultra-high pressure discharge lamps with a rated output of 2KW were manufactured with various lengths of the straight tube between the internal lead rod holding cylinder and the light emitting space surrounding part, and lighting experiments were conducted. We investigated whether or not this occurred. The results are shown in Table-1.
以上説明したように、本考案の放電灯は、発光
空間囲繞部の内径が内部リード棒保持筒体の外径
の２倍以上である放電灯であつて、内部リード棒
保持筒体と発光空間囲繞部の間に直管部を形成
し、この直管部の長さと直径の肉厚との関係をあ
る特定の条件としたので、内部リード棒保持筒体
と封じ管部の溶着部分にかかる応力を最小にで
き、その結果封じ管部にクラツクの発生するのを
抑えることができ、発光管の爆発事故のない放電
灯とすることができる。
As explained above, the discharge lamp of the present invention is a discharge lamp in which the inner diameter of the light emitting space surrounding portion is at least twice the outer diameter of the inner lead rod holding cylinder, and the inner lead rod holding cylinder and the light emitting space are connected to each other. A straight pipe part is formed between the surrounding parts, and the relationship between the length of this straight pipe part and the wall thickness of the diameter is set to a certain condition, so that the welded part of the internal lead rod holding cylinder and the sealing pipe part is The stress can be minimized, and as a result, the occurrence of cracks in the sealed tube portion can be suppressed, making it possible to provide a discharge lamp with no accidental explosion of the arc tube.
第１図は本考案の高圧水銀蒸気放電灯の一実施
例を示す説明用断面図、第２図は要部の拡大図、
第３図は従来の放電灯の一例を示す説明用断面図
である。
１……発光管、１１……発光空間囲繞部、１２
……封じ管部、１３……直管部、２……有底筒
体、３……金属箔、４……内部リード棒、５……
外部リード棒、６……電極、７……内部リード棒
保持筒体、８……溶着部分。
Fig. 1 is an explanatory sectional view showing one embodiment of the high-pressure mercury vapor discharge lamp of the present invention, Fig. 2 is an enlarged view of the main parts,
FIG. 3 is an explanatory cross-sectional view showing an example of a conventional discharge lamp. 1... Luminous tube, 11... Luminous space surrounding part, 12
... Sealed pipe section, 13 ... Straight pipe section, 2 ... Bottomed cylinder, 3 ... Metal foil, 4 ... Internal lead rod, 5 ...
External lead rod, 6... Electrode, 7... Internal lead rod holding cylinder, 8... Welded portion.
Claims (1)
れより両端に伸びる封じ管部よりなるガラス製発
光管と、このガラス製発光管の封じ管部の内部に
おいてその開口端部が当該封じ管部の外端側に向
かうよう配置されたガラス製の有底筒体と、この
有底筒体の筒孔内に挿入された外部リード棒と、
前記有底筒体の底壁端面から前記発光空間囲繞部
内に伸びるよう配置された内部リード棒と、この
内部リード棒の先端に設けられた電極と、前記封
じ管部の内部において前記有底筒体の底壁外方に
位置され、前記内部リード棒をその内部に挿通し
た状態で保持するガラス製の内部リード棒保持筒
体と、前記有底筒体の外周においてその筒軸方向
に伸び、その一端側が前記内部リード棒に電気的
に接続され、その他端側が前記外部リード棒に電
気的に接続された帯状の金属箔とを有し、前記発
光空間囲繞部の内径が前記内部リード棒保持筒体
の外径の２倍以上である放電灯において、 前記内部リード棒保持用筒体と発光空間囲繞部
との間に封じ管部に続く直管部を設け、この直管
部の長さをＬ、内径をＤ、管の肉厚をｔとすると
き、該直管部が以下の関係式を満足するものであ
ることを特徴とする放電灯。 Ｌ≧√・／２[Claims for Utility Model Registration] A glass arc tube consisting of a central roughly spherical light emitting space surrounding part and a sealed tube part extending from this to both ends, and an opening inside the sealed tube part of this glass arc tube. a bottomed cylinder made of glass, the end of which is disposed toward the outer end of the sealed tube; an external lead rod inserted into the cylindrical hole of the bottomed cylinder;
an internal lead rod arranged to extend into the light emitting space surrounding portion from the bottom wall end surface of the bottomed cylinder; an electrode provided at the tip of the internal lead rod; an internal lead rod holding cylinder made of glass that is located outside the bottom wall of the body and holds the internal lead rod in a state in which it is inserted therein; a band-shaped metal foil whose one end side is electrically connected to the internal lead rod and the other end side is electrically connected to the external lead rod; In a discharge lamp whose outer diameter is more than twice the outer diameter of the cylindrical body, a straight tube section continuing to the sealed tube section is provided between the internal lead rod holding cylindrical body and the light emitting space surrounding section, and the length of this straight tube section is A discharge lamp characterized in that the straight tube portion satisfies the following relational expression, where L is the inner diameter, D is the inner diameter, and t is the wall thickness of the tube. L≧√・/2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4959389U JPH0530281Y2 (en) | 1989-04-28 | 1989-04-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4959389U JPH0530281Y2 (en) | 1989-04-28 | 1989-04-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02140756U JPH02140756U (en) | 1990-11-26 |
| JPH0530281Y2 true JPH0530281Y2 (en) | 1993-08-03 |
Family
ID=31567418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4959389U Expired - Lifetime JPH0530281Y2 (en) | 1989-04-28 | 1989-04-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0530281Y2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4670597B2 (en) * | 2005-11-04 | 2011-04-13 | ウシオ電機株式会社 | Short arc type mercury lamp |
| JP5800189B2 (en) * | 2011-09-26 | 2015-10-28 | 岩崎電気株式会社 | Short arc type discharge lamp |
| JP2015185261A (en) * | 2014-03-20 | 2015-10-22 | 岩崎電気株式会社 | Long arc type metal halide lamp |
| JP2016207482A (en) * | 2015-04-23 | 2016-12-08 | 岩崎電気株式会社 | Short arc type discharge lamp |
-
1989
- 1989-04-28 JP JP4959389U patent/JPH0530281Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02140756U (en) | 1990-11-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4130842B2 (en) | Metal vapor discharge lamp and lighting device | |
| KR100822583B1 (en) | High pressure discharge lamp | |
| JPH0530281Y2 (en) | ||
| US7327085B2 (en) | Discharge tubes | |
| JPH10134768A (en) | Discharge lamp | |
| WO2011108184A1 (en) | Lamp | |
| US20100295448A1 (en) | Vehicle discharge lamp | |
| CN104303261B (en) | Excimer lamp | |
| JPS6358456U (en) | ||
| US5500570A (en) | High-intensity discharge lamp with pleated ends | |
| JPH0418198Y2 (en) | ||
| JPH0537400Y2 (en) | ||
| KR940006312B1 (en) | Cold Cathode Fluorescent Lamp | |
| JPH0350609Y2 (en) | ||
| JP3610908B2 (en) | Short arc type ultra high pressure discharge lamp | |
| JP2583317Y2 (en) | lamp | |
| JPH02140755U (en) | ||
| JPH0539565Y2 (en) | ||
| JPH0530282Y2 (en) | ||
| JP2007273373A (en) | Metal halide lamp and lighting device | |
| CN116206945A (en) | A high pressure exposure lamp | |
| JPS604368Y2 (en) | fluorescent lamp device | |
| JPS62193663U (en) | ||
| GB1340551A (en) | High pressure sodium vapour discharge lamp | |
| CN204289372U (en) | A kind of electrode of gaseous discharge lamp |