JPS5963653A - Short-arc metal halide lamp - Google Patents

Short-arc metal halide lamp

Info

Publication number
JPS5963653A
JPS5963653A JP17331882A JP17331882A JPS5963653A JP S5963653 A JPS5963653 A JP S5963653A JP 17331882 A JP17331882 A JP 17331882A JP 17331882 A JP17331882 A JP 17331882A JP S5963653 A JPS5963653 A JP S5963653A
Authority
JP
Japan
Prior art keywords
iodide
lamp
rare earth
ratio
iodides
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.)
Pending
Application number
JP17331882A
Other languages
Japanese (ja)
Inventor
Katsuo Otsuka
大塚 勝夫
Yoshiyuki Tokuda
徳田 好之
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP17331882A priority Critical patent/JPS5963653A/en
Publication of JPS5963653A publication Critical patent/JPS5963653A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00Gas-discharge or vapour-discharge lamps
    • H01J61/02Details
    • H01J61/12Selection of substances for gas fillings; Specified operating pressure or temperature
    • H01J61/125Selection of substances for gas fillings; Specified operating pressure or temperature having an halogenide as principal component

Landscapes

  • Discharge Lamp (AREA)

Abstract

PURPOSE:To obtain a lamp which presents only a small deviation from black body radiation as well as only a small change in color temperature during its life, and in which light discharged from an arc can be effectively utilized in using it in combination with a mirror or the like by adjusting the ratio by weight of thalium iodide to the total weight of the iodides of rare earth metals to within a specified range. CONSTITUTION:Electrodes 2 are provided at the ends of a discharge tube case 1 in such a manner that the ratio (l/d) of the interelectrode distance (l) to the maximum inner diameter (d) of the case 1 is below 1.0. Then the case 1 is charged with mercury, a starting rare gas and metal iodides, thereby constituting a short arc metal halide lamp. In such a lamp, the above metal iodides are comprised of dysprosium iodide, holmium iodide and thulium iodide which are the iodides of rare earth metals as well as thalium iodide and cesium iodide. Besides, the ratio by weight of thalium iodide to the total weight of the iodides of the rare earth metals is adjusted to within the range of 3-25%.

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明は放電管容器の最大内径に対する電極間距離の比
が小さい、いわゆるショートアーク型のメタルハライド
ランプに関する。
DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a so-called short arc type metal halide lamp in which the ratio of the distance between the electrodes to the maximum inner diameter of the discharge tube vessel is small.

〔発明の技術的背景とその問題点〕[Technical background of the invention and its problems]

近年、オーバーヘッドプロジェクタ−(0,H,P、)
の光源やテレビ、映画撮影用の照明光源として従来のハ
ロゲン電球に替え小形で高効率、かつ高演色のメタルハ
ライドランプが期待されている。
In recent years, overhead projectors (0, H, P,)
Metal halide lamps, which are compact, highly efficient, and have high color rendering, are expected to replace conventional halogen bulbs as light sources for televisions, movies, and televisions.

この種の光源としては、すでに特公昭56−8466号
公報に記載されるようにジスジロシウム(Dy)=ホル
ミウム(HO)、ツリウム(Tm)等の希土類金属のハ
ロゲン化物を封入した高圧水銀蒸気放電ランプが知られ
ている。また、同公報にはさらにハロゲン化タリウムや
ハロゲン化セシウムの追加がより有利であることも記載
されている。しかしながら、このランプの外管内に封装
された発光管は。
As a light source of this kind, a high-pressure mercury vapor discharge lamp containing rare earth metal halides such as disdyrosium (Dy), holmium (HO), and thulium (Tm) is already available, as described in Japanese Patent Publication No. 56-8466. It has been known. The publication also states that addition of thallium halide or cesium halide is more advantageous. However, the arc tube sealed inside the outer bulb of this lamp.

その電極間距離が発光管内径の数倍もあるロングアー、
り型であり、このようなアーク長の長い形状ではミラー
(反射鏡)等でアークからの光を有効に利用することは
極めて困ζなことであり、折角の高効率というランプ%
注を充分に生かしきれない欠点があった。このためには
電極間距離を管内径に対して1.0以下といわゆるショ
ートアーク型にすることによって、ランプからの放射光
を充分ゝに活用しようとする考えがある。ところが、上
記種類の金属ハロゲン化物を封入した発光管をシヨ ・
−トアーク型に形成すると、平均演色指数は約90と高
いが、黒体輻射からの偏差が大きくなり、くすんだ白色
光となるばかりでなく、ランプの命中の色温度の変化も
大きいことが判った。
Longer, the distance between the electrodes is several times the inner diameter of the arc tube.
With such a long arc shape, it is extremely difficult to use the light from the arc effectively with a mirror (reflector), etc., and it is extremely difficult to use the lamp with high efficiency.
It had the drawback of not being able to make full use of the notes. To this end, there is an idea to make full use of the light emitted from the lamp by making the distance between the electrodes 1.0 or less relative to the inner diameter of the tube, which is a so-called short arc type. However, when using an arc tube filled with the above types of metal halides,
- When formed in a torpedo-arc type, the average color rendering index is high at about 90, but the deviation from black body radiation becomes large, resulting in dull white light and also a large change in color temperature when the lamp hits the lamp. Ta.

ところで、テレビや映画等の屋外撮影時に補助光源とし
て使用されるランプは、その色温度が昼光の約5600
に近辺にあること、および黒体輻射からの偏差の少ない
ことが映写画面に異和感を生じせしめないために必要な
条件であり、しかも撮影用カメラは所定の色温度に予め
合致するように設定しで使用されるので、ランプの色温
度が寿命中に大きく変化することがあると、とれまた不
都合を生じることになるので、上記各ランプ特性の優れ
たショートアークメタルハライドランプが望まれていた
By the way, the color temperature of lamps used as auxiliary light sources during outdoor filming of TV shows, movies, etc. is about 5600 degrees higher than that of daylight.
The necessary conditions are that the color temperature is close to the black body radiation and that there is little deviation from the black body radiation so that the projection screen does not look strange. Since lamps are used in fixed settings, if the color temperature of the lamp changes significantly during its life, it can cause problems, so a short arc metal halide lamp with excellent lamp characteristics as described above was desired. .

本発明者等は上記ショートアークランプにした場合の特
性変動要因につき究明した結果、それは光効率を上げる
ために希土4A金属ハロゲン化物にさらに追加したよう
化タリウム量に関係することが判った。
The inventors of the present invention have investigated the factors that vary the characteristics when using the short arc lamp described above, and have found that it is related to the amount of thallium iodide that is further added to the rare earth 4A metal halide in order to increase the light efficiency.

すなわち、上記公報記載例のように希土類金属ハロゲン
化物の封□入総重随に対するよう化タリウムの重1式比
が52%にもなる。tうに、【う化タリウム量が多過ぎ
ると上記欠点を生じる。
That is, as in the example described in the above-mentioned publication, the ratio of thallium iodide to the total weight of rare earth metal halides is as high as 52%. However, if the amount of thallium uride is too large, the above drawbacks will occur.

〔発明の目的〕[Purpose of the invention]

本発明は上記事情を考慮してなされたもので。 The present invention has been made in consideration of the above circumstances.

色温度が昼光の約5600に近辺にあって、黒体輻射か
らの偏差が小さく、かつ、寿命中の色温度の変化も少な
く、シかもミラー等と組合せて使用する際にアークから
の光が有効利用できるショートアークメタルハライドラ
ンプを提供することを目的とする。
The color temperature is close to about 5600 that of daylight, and there is little deviation from black body radiation, and there is little change in color temperature over the lifespan. The purpose of the present invention is to provide a short arc metal halide lamp that can be effectively used.

〔発明の概要〕[Summary of the invention]

本発明は放電管容器の両端部に上記容器の最大内径に対
する電極間距離の比が1.0以下になるように電極を対
設し、内部に水銀、始動用希ガスおよび金属よう化物を
封入し、上記金属よう化物はよう化ジスプロシウム、よ
う化ホルミウム、よう化ツリウムの各希土類金属よう化
物とよう化タリウノ・とより化セシウムとからなり、希
土類金属よう化物の緒慮量に対するよう化タリウムの重
量比を3〜25%にしたことを特徴とする。
In the present invention, electrodes are arranged oppositely at both ends of a discharge tube container so that the ratio of the distance between the electrodes to the maximum inner diameter of the container is 1.0 or less, and mercury, a starting rare gas, and a metal iodide are sealed inside. The metal iodide is composed of rare earth metal iodides such as dysprosium iodide, holmium iodide, and thulium iodide, thallium iodide, and cesium iodide, and the amount of thallium iodide relative to the amount of rare earth metal iodide is It is characterized by having a weight ratio of 3 to 25%.

〔%明の実施例〕[Example of % light]

以下2本発明の詳細を図示の実験例および実施例を参照
して説明する。第1図は実験に使用したショートアーク
メタルハライドランプで、(1)は中央部を腫 膨らませた慕λ豫形のたとえば石英ガラスからなる放電
管容器、(2)、(2)は上記容器の両端部に対設した
だ・とえばトリア’l’h02を含有し、たトリエイラ
ッドタングステン合金製の11L極、(3)は上記容器
の端部外周面に被着したたとえばアルミナA12 oa
を主成分とする保温膜、 (4)(4Hよモリブテン等
からなる封止用金属箔、 (5)(5)は封止部にセメ
ント等で固着された口金で、容器内には水銀、始動用希
ガスおよび金属ハロゲン化物が封入されている。
The details of the present invention will be explained below with reference to illustrated experimental examples and examples. Figure 1 shows the short-arc metal halide lamp used in the experiment, where (1) is a discharge tube vessel made of quartz glass, for example, in the shape of a bulge with a swollen central part, (2), and (2) are both ends of the vessel. (3) is a 11L pole made of Trierad tungsten alloy containing, for example, thoria'l'h02, and (3) is a 11L pole made of tungsten alloy, for example, alumina A12 oa, which is coated on the outer peripheral surface of the end of the container.
(4) (metal foil for sealing made of 4H, molybdenum, etc.), (5) (5) is a cap fixed to the sealing part with cement, etc., and the container contains mercury, Contains starting noble gas and metal halide.

また、容器(1)の最大内径td)に対する電極間距離
(°アーク長l)の比ψは13.0以下のショートアー
ク型に設計されている。これは、ランプの用途をオーバ
ーヘッドグロジュクタ用として考えた場合、ミラー(反
射鏡で図示しない。)との適合性において、ショートア
ーク型の方がロングアーク型よりもアークからの光の利
用度の点で有利であり、かつ、ランプ寿命もロングアー
ク型が数千時間も要求されるのに対し約600時間がπ
F容されるので、ランプ管壁負荷としてはかなり高いた
とえば40 W/cIIL2を設計することが可能とな
り、このことは蒸気圧の低い希土類金属のノ・ロゲン化
物を使用する場合、比較的高い蒸気圧を得る点で有利と
なり、したがって効率の向上、演色性の改善が望めるこ
とにもなる。
Moreover, the ratio ψ of the inter-electrode distance (° arc length l) to the maximum inner diameter td of the container (1) is designed to be a short arc type of 13.0 or less. This means that when considering the lamp's use as an overhead glojuctor, the short-arc type uses more light from the arc than the long-arc type in terms of compatibility with the mirror (reflector, not shown). In addition, the lamp life is approximately 600 hours, compared to several thousand hours for long arc types.
F capacity, it is possible to design a fairly high lamp tube wall load, for example 40 W/c IIL2, which means that when using rare earth metal nologides with low vapor pressures, relatively high vapor pressures are required. This is advantageous in terms of obtaining pressure, and therefore, it can be expected to improve efficiency and color rendering properties.

第1図のランプの場合、具体的には放電管容器(1)の
最大内径(d)は15 mu 、電極間距離(A)は1
2m5でl/dは0.75で定格入力は、575Wに設
定し、希土類金属よう化物封入総重量に対しよう化タリ
ウ□ム封入重量を種々変化させて得られたランプ特性と
の関係を第2図に示す。なお、希土類金属よう化物の総
、1世は4.5 mgとし、その他にアーク安に化のた
めによう化セシウムを2 mg添加する。第2図におい
て、横軸は希土類金属よう化物a重量に対するよう化タ
リウム爪針の比を示し、縦軸の上の欄は平均演色評価指
数(鴫)と光効率(lrn/W)を。
In the case of the lamp shown in Fig. 1, specifically, the maximum inner diameter (d) of the discharge tube vessel (1) is 15 mu, and the distance between the electrodes (A) is 1.
2m5, l/d is 0.75, rated input is set to 575W, and the relationship between the lamp characteristics obtained by variously changing the weight of thallium iodide filled with the total weight of rare earth metal iodide filled is shown below. Shown in Figure 2. The total amount of rare earth metal iodide is 4.5 mg, and 2 mg of cesium iodide is added to make the arc weaker. In FIG. 2, the horizontal axis shows the ratio of thallium iodide nail needle to the weight of rare earth metal iodide a, and the column above the vertical axis shows the average color rendering index (dark) and light efficiency (lrn/W).

また下の欄の左側は色温度(6)、右側は黒体輻射から
の偏差(uv)をそれぞれ示す。同図の各特性曲線から
判るように、よう化タリウムを添加し、frいものは光
効率、  )L、、共に低いが、よう化タリウムの添加
重量につれて次第に両特性共に向−ヒし、よう化タリウ
ムの添加は欠かせない。なお、  Raはよう化タリウ
ム比が25%を越えるあたりから緩やかに低ドする。こ
れはよう化タリウムの緑色発光が強くなり過ぎるためと
考えられる。
Further, the left side of the lower column shows the color temperature (6), and the right side shows the deviation from black body radiation (uv). As can be seen from the characteristic curves in the same figure, the light efficiency (L) is low for the friable one with thallium iodide added, but as the weight of thallium iodide added increases, both characteristics gradually improve. Addition of thallium chloride is essential. Note that Ra gradually decreases when the thallium iodide ratio exceeds 25%. This is thought to be because the green luminescence of thallium iodide becomes too strong.

一方9色温度(10はよう化タリウム量の増加に逆比例
して次第に低FL、それにつれて黒体輻射からの偏差(
uv)はマイナス(−)からプラス(+)へと変化する
。この理由は、よう化タリウムを増量すると色度座標の
X値とY値とがそれぞれ増し、特にY値がX値に比し大
きく増加するためである。
On the other hand, the color temperature of 9 (10 is inversely proportional to the increase in the amount of thallium iodide, FL gradually decreases, and the deviation from black body radiation (
uv) changes from minus (-) to plus (+). The reason for this is that when the amount of thallium iodide is increased, the X value and Y value of the chromaticity coordinates increase, and in particular, the Y value increases significantly compared to the X value.

一般に良質の白色光を得るためには、黒体輻射からの偏
差が±〇、010uvを越えてはならず、好ましくは±
0.005uv以内であることが必要であり。
Generally, in order to obtain good quality white light, the deviation from black body radiation should not exceed ±0.010 uv, preferably ±
It needs to be within 0.005 uv.

!侍にランプの用途がフロジエクターやテレビ用照明関
係の場合にはなおさらである。そのためには。
! This is especially true when the samurai's lamps are used for flodictors or television lighting. for that purpose.

希土類金属よう化物総重量に対するよう化タリウムの重
量化は3%〜25%にする必要があることが同図から判
る。3%未満にすると光効率およびRaが極端に低FL
、25%をメ、1(すと黒体輻射からの偏差(uv)が
0.005 uvより大きくなり、かつ。
It can be seen from the figure that the weight of thallium iodide relative to the total weight of rare earth metal iodides needs to be 3% to 25%. If it is less than 3%, the light efficiency and Ra will be extremely low.
, 25%, 1 (if the deviation from blackbody radiation (UV) is greater than 0.005 UV, and.

色温度が昼光の5600Kから大きく外れる結果となる
This results in a color temperature that deviates significantly from daylight's 5600K.

次に、第3図は上記希土類金属よう化物総重量に対する
よう化タリウムの重量比が12%の本発明一実施例と重
量比が本発明の範囲外の30%の各ランプの色温度のラ
ンプ寿命中の変化率を示すグラフで、横軸は点灯時間、
縦軸は色温度変化率すなわち各点灯時間における色温度
の初期点灯時における色温度に対する比を示し9曲線A
は本発明一実施例9曲線Bは本発明外のラングである。
Next, FIG. 3 shows a color temperature lamp according to an embodiment of the present invention in which the weight ratio of thallium iodide to the total weight of the rare earth metal iodide is 12% and a lamp in which the weight ratio is 30% outside the range of the present invention. A graph showing the rate of change over the lifespan. The horizontal axis is the lighting time;
The vertical axis represents the color temperature change rate, that is, the ratio of the color temperature at each lighting time to the color temperature at the initial lighting time.9 Curve A
Embodiment 9 of the present invention Curve B is a rung outside the present invention.

同図からよう化タリウム重量比の少ない本発明ラングの
方が寿命中の色温度の変化が小さいことが判る。これに
1.よう化タリウム重量比が大きいとタリウノ・の輝#
i! 5 :35.nmが他のスペクトルに比較して強
く発光い ランプ寿命中に発光管ノくルブが疲労しで白
濁する結果、保温状態が良くなり。
From the figure, it can be seen that the rung of the present invention, which has a lower weight ratio of thallium iodide, has a smaller change in color temperature during its life. 1. When the weight ratio of thallium iodide is high, the brightness of thallium iodide #
i! 5:35. nm emits more strongly than other spectra.During the life of the lamp, the bulb of the arc tube gets fatigued and becomes cloudy, resulting in better heat retention.

600nm以上の赤色スペクトルが増加して色温度が低
下する傾向が強められるためと考えられる。
This is considered to be because the red spectrum of 600 nm or more increases and the color temperature tends to decrease.

ところで、テレビや映画の野外撮影に補助光源が不0工
欠であるが、野外では当然背景が昼光色であるから、補
助ブ〔、源の色温度もまた昼光の色温度約56(IOK
よりも大きく外ずれることし1許されない、。
By the way, an auxiliary light source is indispensable for outdoor shooting of TV and movies, but since the background is naturally daylight color outdoors, the color temperature of the auxiliary light source is also about 56 (IOK), which is the color temperature of daylight.
It is unacceptable to deviate more than 1.

さもないと、背弔と補助光源による照射面とでは異和感
を生じ9画面が見苦しいものとなってしまう。一般Vこ
昼光色といっても多少の幅があり。
Otherwise, the back cover and the surface illuminated by the auxiliary light source will create a sense of incongruity, making the nine screens unsightly. Even though it is called a general V daylight color, there is some variation.

5000 K〜li 2 (l OKの色温度の範囲内
であればほぼそれとみなせる。したがって、第2図から
よう化タリウムの市;l−1止金3%〜25%とすれば
、上記条f1が6tだされることが判る。
If the color temperature is within the range of 5000 K to li 2 (l OK), it can be regarded as almost the same. Therefore, from Figure 2, if the color temperature of thallium iodide is 3% to 25%, then the above article f1 It can be seen that 6t is delivered.

次に一実施例を示す。最大内径(dN6mm、  電極
氷’@ 40 mg、よう化ジスブロシウA 、  よ
う化ホルミワム、よう化ツリウドの各希十幼金′圧よう
化物がそノ]ぞれ22雷量%、ようfヒセシウム14重
@%。
Next, an example will be shown. Maximum inner diameter (dN 6 mm, electrode ice @ 40 mg, disubrosium iodide A, holmiwaum iodide, thuriud iodide each) 22% each, hycesium 14% @%.

よう化タリウム8重@%(よう化タリウム/希土類金属
よう化物の比が12%)の割合の全金属よう化物を総量
で6.4mg封入し、た定格人力575Wのランプを製
造し、その特性を1llll定し7た結−里、光効率:
、  80 (3n−r/WL  l(,19o、色温
度560 (l Kで、かつ黒体・″ 輻射からの偏差
は殆んどゼロで03: )Y理想的なラン5 プをイ:
することかできた。とれに対し同種ランプで、金属よう
化物の比率を変え、よう化ジスプロシウム、よう化ホル
ミウム、よう化ツリウムの各届土類金)・−4よう化物
をそれぞれ22重r4%、 よう−化セシウム14重保
%、よう化タリウム20雷量%(よう化タリウム/希土
類金Inよう化物の比が30%)とし、全金感よう化物
の総量を6.4 mg封入し/こランプの特性は、光効
率847m/W、 H・、a92であったが9色温度は
4800にと尼、光色よりも大幅に低く、シかも黒体輻
射からの偏差は0.010uvにも達し、光色がやや緑
色味を帯びてくすんだ感じとなった。
A lamp with a rated human power of 575 W was manufactured, containing a total of 6.4 mg of all-metal iodide at a ratio of thallium iodide 8w@% (thallium iodide/rare earth metal iodide ratio of 12%), and its characteristics After determining 1lllll of 7, Yuuri, light efficiency:
, 80 (3n-r/WL l(, 19o, color temperature 560 (l K, and the deviation from the blackbody radiation is almost zero, 03: ) Y Ideal lamp 5:
I was able to do something. Using the same type of lamp, the ratio of metal iodide was changed, and each of dysprosium iodide, holmium iodide, and thulium iodide was added to 22wt r4%, and cesium iodide was added to 14%. The characteristics of this lamp are as follows: 20% thallium iodide (the ratio of thallium iodide/rare earth gold In iodide is 30%), and the total amount of gold-sensitized iodide is 6.4 mg. The light efficiency was 847 m/W, H., a92, but the color temperature was 4800, which is significantly lower than the light color, and the deviation from black body radiation was as much as 0.010 uv, so the light color was It had a slightly greenish tinge and a dull feel.

なお、−&土類金属よう化物およびよう化タリウノ・の
他に添加するよう化セシウムはアークの安定化を目的と
するもので、封入金属よう化物全重量中に10%以上添
加することが好ましく、その他のランプ特性には大きな
影響を与えるものではない。
In addition, cesium iodide added in addition to earth metal iodide and talion iodide is for the purpose of stabilizing the arc, and is preferably added in an amount of 10% or more to the total weight of the enclosed metal iodide. , it does not have a large effect on other lamp characteristics.

〔発明の効果〕〔Effect of the invention〕

以上詳述しまたように1本発明によればショートアーク
メタルハライドランプにおいて、希土類金属よう化物は
対するよう化タリウムの重量比を従来より小さい3%〜
25%としたので、昼光の色温度が得られ、かつ、黒体
輻射からの偏差も少なく。
As described in detail above, in the short arc metal halide lamp according to the present invention, the weight ratio of rare earth metal iodide to thallium iodide is 3% to 3%, which is lower than that of the conventional method.
Since it is set at 25%, the color temperature of daylight can be obtained, and the deviation from black body radiation is also small.

そのうえショートアーク型なのでミラー(反射鏡)等と
の組合せによるアークからの光の有効利用にも極めて好
適する形状を有するので、特にプロジェクタ−やテレビ
、映画の撮影用光源として大巻な効果を発揮できる利点
を有する。
Furthermore, since it is a short arc type, it has a shape that is extremely suitable for effective use of light from the arc by combining with mirrors (reflectors), etc., so it is particularly effective as a light source for projectors, TVs, and movie shooting. It has the advantage of being able to

【図面の簡単な説明】[Brief explanation of drawings]

第1図はショートアークメタルハライドランプの正面図
、第2図は希土類金属よう化物総重量に対するよう化タ
リウムの重量比と各ランプ特性との関係図、第3図は本
発明の一実施例と本発明竜以外の2ンプの寿命中の色温
度変化率を比較して示す図である。 (1)・・・放電管容器、(2)・・・電 極。 (d)・・・放電管容器の最大内径。 (1)・・・電極間距離 (7317)  代理人 弁理士  則 近 憲 佑(
ほか 1名) 第1図 第′2図 よう化タリウム ′希土類金属よう化物 (重量%) 第3図 点灯時間
Fig. 1 is a front view of a short arc metal halide lamp, Fig. 2 is a relationship between the weight ratio of thallium iodide to the total weight of rare earth metal iodide and each lamp characteristic, and Fig. 3 is a diagram showing one embodiment of the present invention and the present invention. FIG. 3 is a diagram showing a comparison of color temperature change rates during the life of two lamps other than Inventor. (1)...discharge tube container, (2)...electrode. (d) Maximum inner diameter of the discharge tube container. (1)... Distance between electrodes (7317) Agent: Patent attorney Noriyuki Chika (
(and 1 person) Figure 1 Figure 2 Thallium iodide Rare earth metal iodide (% by weight) Figure 3 Lighting time

Claims (1)

【特許請求の範囲】 放電管容器の両端部に上記容器の最大内径(d)に対す
る電極間距離<1>の比1/dが1.0以下になるよう
に電極を対設し、内部に水銀および始動用希ガスと共に
金属よう化物を封入したショートアークメタルハライド
ランプにおいて、上記金属よう化物はよう化ジスプロシ
ウム、よう化永ルミウム。 iう化ツリウムの各希土類金属よう化物とよう化タリウ
ムとよう化セシウムとからなり、かつ、希土類金属よう
化物の総重量に対するよう化タリウムの重量比が3〜2
5%であることを特徴とするショートアークメタルハラ
イドランプ。
[Claims] Electrodes are provided at both ends of the discharge tube container so that the ratio 1/d of the inter-electrode distance <1> to the maximum inner diameter (d) of the container is 1.0 or less, and In a short arc metal halide lamp in which a metal iodide is sealed together with mercury and a starting noble gas, the metal iodide is dysprosium iodide or lumium iodide. i It consists of each rare earth metal iodide of thulium iodide, thallium iodide, and cesium iodide, and the weight ratio of thallium iodide to the total weight of the rare earth metal iodide is 3 to 2.
5% short arc metal halide lamp.
JP17331882A 1982-10-04 1982-10-04 Short-arc metal halide lamp Pending JPS5963653A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17331882A JPS5963653A (en) 1982-10-04 1982-10-04 Short-arc metal halide lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17331882A JPS5963653A (en) 1982-10-04 1982-10-04 Short-arc metal halide lamp

Publications (1)

Publication Number Publication Date
JPS5963653A true JPS5963653A (en) 1984-04-11

Family

ID=15958208

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17331882A Pending JPS5963653A (en) 1982-10-04 1982-10-04 Short-arc metal halide lamp

Country Status (1)

Country Link
JP (1) JPS5963653A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0235354A1 (en) * 1986-01-09 1987-09-09 Becton, Dickinson and Company Long-life mercury arc lamp
JPH03219546A (en) * 1989-05-31 1991-09-26 Iwasaki Electric Co Ltd Metal halide lamp
EP0583113A1 (en) * 1992-07-29 1994-02-16 Flowil International Lighting (Holding) B.V. Discharge lamp arc tubes

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS568466A (en) * 1979-07-03 1981-01-28 Dainichi Seika Kogyo Kk Fibrous top coating material
JPS5628455A (en) * 1979-08-15 1981-03-20 Hitachi Ltd High pressure metal vapor discharge lamp

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS568466A (en) * 1979-07-03 1981-01-28 Dainichi Seika Kogyo Kk Fibrous top coating material
JPS5628455A (en) * 1979-08-15 1981-03-20 Hitachi Ltd High pressure metal vapor discharge lamp

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0235354A1 (en) * 1986-01-09 1987-09-09 Becton, Dickinson and Company Long-life mercury arc lamp
JPH03219546A (en) * 1989-05-31 1991-09-26 Iwasaki Electric Co Ltd Metal halide lamp
EP0583113A1 (en) * 1992-07-29 1994-02-16 Flowil International Lighting (Holding) B.V. Discharge lamp arc tubes

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