JPH09147803A - High pressure discharge lamp and illuminating optical device using it and image display device - Google Patents
High pressure discharge lamp and illuminating optical device using it and image display deviceInfo
- Publication number
- JPH09147803A JPH09147803A JP7302557A JP30255795A JPH09147803A JP H09147803 A JPH09147803 A JP H09147803A JP 7302557 A JP7302557 A JP 7302557A JP 30255795 A JP30255795 A JP 30255795A JP H09147803 A JPH09147803 A JP H09147803A
- Authority
- JP
- Japan
- Prior art keywords
- discharge lamp
- light emitting
- emitting tube
- arc tube
- tube end
- 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
Links
- 230000003287 optical effect Effects 0.000 title claims description 27
- 239000000919 ceramic Substances 0.000 claims abstract description 60
- 239000004020 conductor Substances 0.000 claims abstract description 20
- 239000003566 sealing material Substances 0.000 claims abstract description 20
- 238000005286 illumination Methods 0.000 claims description 16
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 abstract description 8
- 229910001507 metal halide Inorganic materials 0.000 description 7
- 150000005309 metal halides Chemical class 0.000 description 7
- 238000007789 sealing Methods 0.000 description 7
- 238000000295 emission spectrum Methods 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 4
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 4
- 229910052753 mercury Inorganic materials 0.000 description 4
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000009877 rendering Methods 0.000 description 2
- 125000004429 atom Chemical group 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、一般照明や光学機
器等に用いられる高圧放電灯、およびそれを用いた照明
光学装置ならびに画像表示装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-pressure discharge lamp used for general lighting and optical equipment, and an illumination optical device and an image display device using the high-pressure discharge lamp.
【０００２】[0002]
【従来の技術】近年、透光性セラミックス発光管からな
る高圧放電灯（以下、「セラミック放電灯」と略記す
る）は店舗照明、道路照明等の一般照明用として用いら
れており、また自動車用照明、あるいは光学機器用光源
としての要望も多くある。以下図面を参照しながら上述
したセラミック放電灯の一例について説明する。2. Description of the Related Art In recent years, high-pressure discharge lamps (hereinafter abbreviated as "ceramic discharge lamps") consisting of translucent ceramic arc tubes have been used for general lighting such as store lighting and road lighting, and also for automobiles. There are also many demands for illumination or a light source for optical equipment. An example of the ceramic discharge lamp described above will be described below with reference to the drawings.
【０００３】図５は従来のセラミック放電灯の構成を示
す断面図である。図５において、セラミック放電灯は、
発光管発光部１の両端に発光管端部２を備え、その内部
に一対の電極３を有している。また、発光管端部２は、
電極３と外部リ−ド線５とが導電部４を介して一体とな
った導電体と、封着材６とにより封止されている。FIG. 5 is a sectional view showing the structure of a conventional ceramic discharge lamp. In FIG. 5, the ceramic discharge lamp is
The arc tube light emitting portion 1 is provided with arc tube end portions 2 at both ends thereof, and a pair of electrodes 3 are provided therein. Further, the arc tube end portion 2 is
The electrode 3 and the external lead wire 5 are sealed by a conductor in which the electrode 3 and the external lead wire 5 are integrated via the conductive portion 4, and the sealing material 6.
【０００４】以上のように構成されたセラミック放電灯
において、水銀、希ガスとともに封入された金属ハロゲ
ン化物等の発光物質は、セラミック放電灯の点灯中、発
光管管壁付近に液体として存在する。また、一部蒸発し
た金属ハロゲン化物蒸気は、アークの中心部で金属原子
とハロゲン原子に解離し、金属ハロゲン化物蒸気がアー
クで励起されその金属特有のスペクトルを放射する。セ
ラミック放電灯は耐熱性及び耐食性に優れているため、
高効率で長寿命な放電灯を得ることが可能である。In the ceramic discharge lamp configured as described above, the light emitting substance such as mercury and metal halide enclosed together with the rare gas is present as a liquid near the wall of the arc tube during lighting of the ceramic discharge lamp. The partially vaporized metal halide vapor is dissociated into metal atoms and halogen atoms at the center of the arc, and the metal halide vapor is excited by the arc and emits a spectrum peculiar to the metal. Because ceramic discharge lamps have excellent heat resistance and corrosion resistance,
It is possible to obtain a discharge lamp with high efficiency and long life.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、従来の
セラミック放電灯では封入する発光物質と封着材との反
応により、ランプ電圧の低下、あるいはリークによるセ
ラミック放電灯の点灯不良や寿命劣化が生じやすいとい
う問題点があった。However, in the conventional ceramic discharge lamp, the reaction between the light-emitting substance and the sealing material, which are encapsulated in the conventional ceramic discharge lamp, is likely to cause a decrease in lamp voltage or a lighting failure or a deterioration in life of the ceramic discharge lamp due to leakage. There was a problem.
【０００６】そこで本発明は、上記の問題点に鑑み長寿
命かつ高効率のセラミック放電灯を提供すること、およ
びそれを用いて長寿命の照明光学装置ならびに画像表示
装置を提供することを目的とする。Therefore, an object of the present invention is to provide a long-life and high-efficiency ceramic discharge lamp in view of the above problems, and to provide a long-life illumination optical device and an image display device using the same. To do.
【０００７】[0007]
【課題を解決するための手段】上記問題点を解決するた
めに本発明は、発光物質を封入した透光性を有するセラ
ミックスからなる発光管の内部に、一対の電極を備えた
高圧放電灯において、前記発光管の発光管端部の外径が
発光管発光部の最大外径より小さく、前記発光管端部の
少なくとも一方は、前記電極と外部リ−ド線とが一体と
なった導電体と封着材を用いて封止されており、前記発
光管端部の長さＬ１と，該発光管端部と前記導電体との
封着材による接合部長さＬ２とを、２ｍｍ≦Ｌ２≦２０
ｍｍ、かつ４ｍｍ≦Ｌ１−Ｌ２≦２０ｍｍとすることを
特徴とする。以上の構成としたことにより、封入する発
光物質と封着材との反応が抑制され、長寿命化が実現で
きる。In order to solve the above problems, the present invention provides a high pressure discharge lamp having a pair of electrodes inside an arc tube made of a translucent ceramics containing a luminescent material. The outer diameter of the arc tube end portion of the arc tube is smaller than the maximum outer diameter of the arc tube light emitting portion, and at least one of the arc tube end portions is a conductor in which the electrode and the external lead wire are integrated. And the length L1 of the arc tube end portion and the joint length L2 of the arc tube end portion and the conductor by the sealing material are 2 mm ≦ L2 ≦ 20
mm and 4 mm ≦ L1−L2 ≦ 20 mm. With the above configuration, the reaction between the light emitting substance to be encapsulated and the sealing material is suppressed, and a long life can be realized.
【０００８】さらに、前記発光管端部の最小内径Ｌ３
を、０．２ｍｍ≦Ｌ３≦５ｍｍとすることにより、長寿
命および高効率のセラミック放電灯を得ることができ
る。また、前記セラミック放電灯と、反射面が放物面あ
るいは楕円面よりなる凹面反射鏡とを用い、前記セラミ
ック放電灯のア−ク軸が前記凹面反射鏡の光軸上に位置
するように配置した構成により、長寿命の照明光学装置
を得ることができる。Further, the minimum inner diameter L3 of the arc tube end portion
Is 0.2 mm ≦ L3 ≦ 5 mm, a ceramic discharge lamp having a long life and high efficiency can be obtained. Further, the ceramic discharge lamp and a concave reflecting mirror whose reflecting surface is a paraboloid or an ellipsoid are used, and the arc axis of the ceramic discharging lamp is arranged so as to be located on the optical axis of the concave reflecting mirror. With this configuration, a long-life illumination optical device can be obtained.
【０００９】また、光源および集光部を備えた光源部
と、画像形成部とからなる画像表示装置において、光源
部に前記照明光学装置を用いたことにより、長寿命の画
像表示装置を得ることができる。Further, in an image display device comprising a light source part having a light source and a light condensing part, and an image forming part, by using the illumination optical device for the light source part, an image display device having a long life can be obtained. You can
【００１０】[0010]
【発明の実施の形態】以下、この発明の具体的な実施形
態を図面に基づいて詳細に説明する。図１の断面図に示
す本実施形態のセラミック放電灯は、発光管発光部１の
両端に発光管端部２を備え、その内部に一対の電極３を
有している。そして、発光管端部２は、電極３と外部リ
−ド線５とが導電部４を介して一体となった導電体によ
り、封止されている。この封止の際、発光管端部２と前
記導電体の導電部４とは、封着材６により密封封止され
ている。電極３の材料としては、例えばタングステン等
が考えられる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described in detail below with reference to the drawings. The ceramic discharge lamp of this embodiment shown in the cross-sectional view of FIG. 1 has arc tube light emitting parts 1 at both ends thereof, and has a pair of electrodes 3 inside thereof. The arc tube end portion 2 is sealed by a conductor in which the electrode 3 and the external lead wire 5 are integrated via the conductive portion 4. At the time of this sealing, the arc tube end portion 2 and the conductive portion 4 of the conductor are hermetically sealed by the sealing material 6. As a material of the electrode 3, for example, tungsten or the like can be considered.
【００１１】上記構成のセラミック放電灯において、発
光管端部２の長さＬ１と、封着材６による発光管端部２
と導電体との接合部長さＬ２は、数通りの実験を行い、
その結果に基づいて適正値を定めた。In the ceramic discharge lamp having the above structure, the length L1 of the arc tube end portion 2 and the arc tube end portion 2 formed by the sealing material 6 are used.
For the joint length L2 between the conductor and the conductor, several experiments were conducted.
An appropriate value was set based on the result.
【００１２】封着材６による発光管端部２と導電体との
接合部長さＬ２は、長ければ長いほど封着部６からのリ
ークは起こりにくい。Ｌ２＝１．０ｍｍとすると、セラ
ミック放電灯の点灯時間が１０００時間以下で、約４５
％のセラミック放電灯において封着部６からリークが発
生した。Ｌ２＝１．５ｍｍとすると、セラミック放電灯
の点灯時間が４０００時間以下で、約２５％のセラミッ
ク放電灯において封着部６からリークが発生した。Ｌ２
＝２．０ｍｍでは、セラミック放電灯の点灯時間が５０
００時間経過しても封着部６からのリークは認められな
かった。また、Ｌ２＞２０ｍｍとすることは、封着工程
上非常に困難であり、セラミック放電灯を製作する際の
効率が悪い。The longer the joint length L2 between the arc tube end 2 and the conductor by the sealing material 6 is, the less the leakage from the sealing portion 6 occurs. If L2 = 1.0 mm, the lighting time of the ceramic discharge lamp is less than 1000 hours and about 45
%, A leak occurred from the sealing portion 6 in the ceramic discharge lamp. When L2 = 1.5 mm, the lighting time of the ceramic discharge lamp was 4000 hours or less, and about 25% of the ceramic discharge lamp leaked from the sealing portion 6. L2
== 2.0 mm, the lighting time of the ceramic discharge lamp is 50
No leakage from the sealing portion 6 was observed even after 00 hours had elapsed. Further, it is very difficult to set L2> 20 mm in the sealing process, and the efficiency in manufacturing the ceramic discharge lamp is poor.
【００１３】したがって、封着材６による発光管端部２
と導電体との接合長さＬ２は、２ｍｍ≦Ｌ２≦２０ｍｍ
が好ましい。Ｌ１−Ｌ２＜４ｍｍとすると、長時間のセ
ラミック放電灯の点灯により封着材材料６の一部が放電
空間内に侵入する。侵入した封着材料６は電極３と反応
しセラミック放電灯の黒化を促進したり、封着材料６自
体が発光し、セラミック放電灯の演色性を低下させる。
また、封着材料６と発光管材料とが反応し、発光管の侵
食あるいはリークを引き起こす。また、Ｌ１−Ｌ２＞２
０ｍｍとすると、金属ハロゲン化物等の発光物質が発光
管端部２と導電体の間の隙間に侵入し、ランプ効率及び
演色性の低下を招く。Therefore, the end portion 2 of the arc tube made of the sealing material 6
The joint length L2 between the conductor and the conductor is 2 mm ≦ L2 ≦ 20 mm
Is preferred. When L1-L2 <4 mm, a part of the sealing material 6 penetrates into the discharge space due to lighting of the ceramic discharge lamp for a long time. The sealing material 6 that has penetrated reacts with the electrode 3 to accelerate the blackening of the ceramic discharge lamp, or the sealing material 6 itself emits light to reduce the color rendering of the ceramic discharge lamp.
Further, the sealing material 6 and the arc tube material react to cause erosion or leakage of the arc tube. Also, L1-L2> 2
When the thickness is 0 mm, a light emitting substance such as a metal halide penetrates into the gap between the end portion 2 of the arc tube and the conductor, resulting in deterioration of lamp efficiency and color rendering.
【００１４】したがって、４ｍｍ≦Ｌ１−Ｌ２≦２０ｍ
ｍが好ましい。さらに、発光管端部２の最小内径Ｌ３に
ついても数通りの実験を行い、その結果に基づいて適正
値を定めた。Therefore, 4 mm≤L1-L2≤20 m
m is preferred. Further, several experiments were also performed on the minimum inner diameter L3 of the arc tube end portion 2, and an appropriate value was determined based on the results.
【００１５】Ｌ３＜０．２ｍｍとすると、セラミック発
光管の成形および水銀及びハロゲン化金属等の発光物質
の封入が非常に困難になる。Ｌ３＞５ｍｍとすると、発
光管端部２と導電体との隙間の体積が大きくなり、ハロ
ゲン化金属等の発光物質が隙間に多量に凝縮するため、
多量のハロゲン化金属等の発光物質を封入しなければな
らない。そして、発光管および導電体の容積が大きくな
るため、熱損失が大きくなりランプ効率の低下を招く。When L3 <0.2 mm, it becomes very difficult to mold the ceramic arc tube and enclose the luminous substance such as mercury and metal halide. When L3> 5 mm, the volume of the gap between the arc tube end portion 2 and the conductor becomes large, and a large amount of the luminescent substance such as a metal halide is condensed in the gap.
A large amount of luminescent material such as metal halide must be enclosed. Then, since the volumes of the arc tube and the conductor become large, heat loss becomes large and the lamp efficiency is lowered.
【００１６】したがって、発光管端部２の最小内径Ｌ３
は、０．２ｍｍ≦Ｌ３≦５ｍｍが好ましい。ここに、本
実施形態であるセラミック放電灯の一例を示す。発光管
発光部１は略回転楕円体形状で中央部最大内径は１０．
０ｍｍ、内容積は０．９ｃｃ、肉厚は１．０ｍｍであ
る。発光管端部２の最小内径は１．２ｍｍであり、発光
管端部２の長さＬ１は１５ｍｍとした。また、発光管と
導電体の封着剤６による接合部の長さＬ２は６ｍｍとし
た。電極間距離すなわちアーク長は８ｍｍである。発光
管内にはＤｙＩ３が３ｍｇ、ＴｌＩ３が０．５ｍｇ、Ｃ
ｓＩが０．２ｍｇ、さらに緩衝ガスとして水銀が８ｍ
ｇ、始動用希ガスとしてＡｒが１５０Ｔｏｒｒ封入され
ている。そして、この構成のセラミック放電灯に外管を
設け、ライフテストを行った。ランプ電圧９０Ｖ、ラン
プ電流１.７Ａ、ランプ電力１５０Ｗで点灯した。Therefore, the minimum inner diameter L3 of the arc tube end 2 is
Is preferably 0.2 mm ≦ L3 ≦ 5 mm. Here, an example of the ceramic discharge lamp according to the present embodiment is shown. The arc tube light emitting part 1 has a substantially spheroidal shape, and the maximum inner diameter of the central part is 10.
The thickness is 0 mm, the internal volume is 0.9 cc, and the wall thickness is 1.0 mm. The minimum inner diameter of the arc tube end 2 was 1.2 mm, and the length L1 of the arc tube end 2 was 15 mm. Further, the length L2 of the joint between the arc tube and the conductor with the sealing agent 6 was set to 6 mm. The distance between the electrodes, that is, the arc length is 8 mm. 3 mg of DyI 3 , 0.5 mg of TlI 3 and C in the arc tube.
sI is 0.2 mg, and mercury is 8 m as a buffer gas.
g, 150 Torr of Ar is enclosed as a rare gas for starting. Then, an outer tube was provided in the ceramic discharge lamp of this configuration and a life test was conducted. It was lit with a lamp voltage of 90 V, a lamp current of 1.7 A, and a lamp power of 150 W.
【００１７】以上のライフテストの実験結果を示してい
るのが、図２である。図２において、縦軸は実験に用い
たセラミック放電灯の本数（ｎ）を示し、横軸はセラミ
ック放電灯の寿命（ｈｏｕｒ）を示している。図２を見
れば明らかなように、本発明のセラミック放電灯は、従
来のセラミック放電灯と比較して、長寿命化が可能とな
った。FIG. 2 shows the experimental results of the above life test. In FIG. 2, the vertical axis represents the number (n) of ceramic discharge lamps used in the experiment, and the horizontal axis represents the life (hour) of the ceramic discharge lamp. As is apparent from FIG. 2, the ceramic discharge lamp of the present invention has a longer life than the conventional ceramic discharge lamp.
【００１８】図３は、図１のセラミック放電灯を組み込
んだ発光スペクトル評価用光学系の概略図を示してい
る。図３において、７はセラミック放電灯、８は凹面反
射鏡（集光ミラー）、９はＵＶ-ＩＲフィルター、１０
はコンデンサレンズ、１１はアパーチャー、１２は投射
レンズ、１３は受光面である。この図３には、本発明の
第二実施形態と第三実施形態とが示されている。FIG. 3 is a schematic view of an optical system for evaluating an emission spectrum, which incorporates the ceramic discharge lamp of FIG. In FIG. 3, 7 is a ceramic discharge lamp, 8 is a concave reflecting mirror (condensing mirror), 9 is a UV-IR filter, 10
Is a condenser lens, 11 is an aperture, 12 is a projection lens, and 13 is a light receiving surface. FIG. 3 shows a second embodiment and a third embodiment of the present invention.
【００１９】本発明の第二実施形態は、本発明の第一実
施形態であるセラミック放電灯７と凹面反射鏡８とを組
み合わせて照明光学装置１４を構成したものである。照
明光学装置１４に、本発明のセラミック放電灯を組み込
んだことにより、長寿命な照明光学装置１４を提供する
ことができる。The second embodiment of the present invention is an illumination optical device 14 constructed by combining the ceramic discharge lamp 7 and the concave reflecting mirror 8 of the first embodiment of the present invention. By incorporating the ceramic discharge lamp of the present invention in the illumination optical device 14, it is possible to provide the illumination optical device 14 having a long life.
【００２０】また、本発明の第三実施形態は、第二実施
形態である照明光学装置１４を、画像表示装置に組み込
んだものである。画像表示装置は、通常、光源および集
光部からなる光源部と画像形成部とから構成されてお
り、図３において、照明光学装置１４が光源部に相当
し、ＵＶ−ＩＲフィルタ−、コンデンサレンズ、アパ−
チャ−および投射レンズ等で構成される光学系が画像形
成部に相当する。光源部に、本発明の第二実施形態であ
る照明光学装置１４を用いることにより、長寿命な画像
表示装置（本実施形態においては発光スペクトル評価用
光学系）を得ることができる。In the third embodiment of the present invention, the illumination optical device 14 of the second embodiment is incorporated in an image display device. The image display device is generally composed of a light source part including a light source and a light condensing part, and an image forming part. In FIG. 3, the illumination optical device 14 corresponds to the light source part, a UV-IR filter, and a condenser lens. , Apart
An optical system including a char and a projection lens corresponds to the image forming unit. By using the illumination optical device 14 according to the second embodiment of the present invention for the light source section, it is possible to obtain an image display device (emission spectrum evaluation optical system in this embodiment) having a long life.
【００２１】ここに、本実施形態であるセラミック放電
灯の他の例を示す。発光管発光部１は略回転楕円体形状
で中央部最大内径は９．０ｍｍ、内容積は０．７５ｃ
ｃ、肉厚は１．０ｍｍである。発光管端部２の最小内径
は１．８ｍｍであり、発光管端部２の長さＬ１は１７．
５ｍｍとした。また、発光管と導電体の封着剤６による
接合部の長さＬ２は７ｍｍとした。電極間距離すなわち
アーク長は３．０ｍｍである。発光管内にはＤｙＩ３が
３ｍｇ、ＮｄＩ３が３ｍｇ、ＣｓＩが１．５ｍｇ、Ｌｉ
Ｉが１ｍｇ、さらに緩衝ガスとして水銀が３５ｍｇ、始
動用希ガスとしてＡｒが２００Ｔｏｒｒ封入されてい
る。Here, another example of the ceramic discharge lamp of this embodiment is shown. The arc tube light emitting part 1 has a substantially spheroidal shape, the central maximum inner diameter is 9.0 mm, and the internal volume is 0.75 c.
c, the wall thickness is 1.0 mm. The minimum inner diameter of the arc tube end 2 is 1.8 mm, and the length L1 of the arc tube end 2 is 17.
5 mm. The length L2 of the joint between the arc tube and the conductor sealing material 6 was 7 mm. The distance between the electrodes, that is, the arc length is 3.0 mm. 3mg is DyI 3 is within the arc tube, NdI 3 is 3mg, CsI is 1.5 mg, Li
1 mg of I, 35 mg of mercury as a buffer gas, and 200 Torr of Ar as a rare gas for starting are enclosed.
【００２２】そして、この構成のセラミック放電灯を図
３に示す発光スペクトル評価用光学系に組み込んでライ
フテストを行った。ランプ電力２００Ｗ、ランプ電圧６
５Ｖ、ランプ電流３．１Ａで点灯した。Then, the ceramic discharge lamp of this construction was incorporated into the optical system for evaluating the emission spectrum shown in FIG. 3 and a life test was conducted. Lamp power 200W, lamp voltage 6
It was lit at 5 V and a lamp current of 3.1 A.
【００２３】以上のライフテストの実験結果を示してい
るのが、図４である。図４において、縦軸は実験に用い
たセラミック放電等の本数（ｎ）を示し、横軸はセラミ
ック放電灯の寿命（ｈｏｕｒ）を示している。図４を見
れば明らかなように、本発明のセラミック放電灯は、従
来のセラミック放電灯と比較して、長寿命化が可能とな
った。したがって、このセラミック放電灯を組み込んだ
発光スペクトル評価用光学系についても、長寿命化が可
能となった。FIG. 4 shows the experimental results of the above life test. In FIG. 4, the vertical axis represents the number (n) of ceramic discharges used in the experiment, and the horizontal axis represents the life (hour) of the ceramic discharge lamp. As is clear from FIG. 4, the ceramic discharge lamp of the present invention has a longer life than the conventional ceramic discharge lamp. Therefore, it has become possible to extend the life of the optical system for evaluating the emission spectrum in which the ceramic discharge lamp is incorporated.
【００２４】上記各実施形態では、セラミック放電灯に
封入するハロゲン化物としてヨウ化物を使用したものを
示したが、臭化物あるいはヨウ化物と臭化物を混合して
も本発明の効果を得ることができる。In each of the above embodiments, iodide is used as the halide enclosed in the ceramic discharge lamp, but the effect of the present invention can be obtained even if bromide or iodide and bromide are mixed.
【００２５】[0025]
【発明の効果】以上のように本発明は、セラミック放電
灯の発光管端部の長さＬ１と，発光管端部と前記導電体
との封着材による接合部長さＬ２とを、２ｍｍ≦Ｌ２≦
２０ｍｍ、かつ４ｍｍ≦Ｌ１−Ｌ２≦２０ｍｍとするこ
とにより、セラミック放電灯の長寿命化を実現できる。
また、発光管端部の最小内径Ｌ３を、０．２ｍｍ≦Ｌ３
≦５ｍｍとすることにより、高効率なセラミック放電灯
を得ることができる。As described above, according to the present invention, the length L1 of the end portion of the arc tube of the ceramic discharge lamp and the length L2 of the joint portion between the end portion of the arc tube and the conductor by the sealing material are 2 mm ≦. L2 ≦
By setting 20 mm and 4 mm ≦ L1−L2 ≦ 20 mm, it is possible to extend the life of the ceramic discharge lamp.
Further, the minimum inner diameter L3 of the arc tube end portion is set to 0.2 mm ≦ L3
By setting ≦ 5 mm, a highly efficient ceramic discharge lamp can be obtained.
【００２６】また、本発明の照明光学装置および画像表
示装置は、上記セラミック放電灯を用いることにより、
長寿命化を実現することができる。Further, the illumination optical device and the image display device of the present invention use the above ceramic discharge lamp,
A long life can be realized.
【図１】本発明の第一実施形態であるセラミック放電灯
の断面図FIG. 1 is a sectional view of a ceramic discharge lamp according to a first embodiment of the present invention.
【図２】図１のセラミック放電灯の一例と従来のセラミ
ック放電灯との寿命特性比較図FIG. 2 is a life characteristic comparison diagram of an example of the ceramic discharge lamp of FIG. 1 and a conventional ceramic discharge lamp.
【図３】図１のセラミック放電灯を組み込んだ発光スペ
クトル評価用光学系の概略図FIG. 3 is a schematic view of an optical system for evaluating an emission spectrum incorporating the ceramic discharge lamp of FIG.
【図４】図３の発光スペクトル評価用光学系に図１のセ
ラミック放電灯の他の例を組み込んだ場合と従来のセラ
ミック放電灯を組み込んだ場合との寿命特性比較図FIG. 4 is a life characteristic comparison diagram when the other example of the ceramic discharge lamp of FIG. 1 is incorporated into the optical system for evaluating the emission spectrum of FIG. 3 and when a conventional ceramic discharge lamp is incorporated.
【図５】従来のセラミック放電灯の断面図FIG. 5 is a sectional view of a conventional ceramic discharge lamp.
１ 発光管発光部 ２ 発光管端部 ３ 電極 ４ 導電部 ５ 外部リード線 ６ 封着材 ７ セラミック放電灯 ８ 凹面反射鏡（集光ミラー） ９ ＵＶ-ＩＲフィルター １０ コンデンサレンズ １１ アパーチャー １２ 投射レンズ １３ 受光面 １４ 照明光学装置 1 Arc Tube Light Emitting Section 2 Arc Tube End 3 Electrode 4 Conductive Section 5 External Lead Wire 6 Sealing Material 7 Ceramic Discharge Lamp 8 Concave Reflecting Mirror (Condensing Mirror) 9 UV-IR Filter 10 Condenser Lens 11 Aperture 12 Projection Lens 13 Light receiving surface 14 Illumination optical device
Claims (4)
ミックスからなる発光管の内部に、一対の電極を備えた
高圧放電灯において、前記発光管の発光管端部の外径が
発光管発光部の最大外径より小さく、前記発光管端部の
少なくとも一方は、前記電極と外部リ−ド線とが一体と
なった導電体と封着材を用いて封止されており、前記発
光管端部の長さＬ１と，該発光管端部と前記導電体との
封着材による接合部長さＬ２とを、２ｍｍ≦Ｌ２≦２０
ｍｍ、かつ４ｍｍ≦Ｌ１−Ｌ２≦２０ｍｍとすることを
特徴とする高圧放電灯。1. In a high pressure discharge lamp having a pair of electrodes inside a light emitting tube made of a translucent ceramic in which a light emitting material is sealed, the outer diameter of the end of the light emitting tube is the light emitting tube emitting light. Smaller than the maximum outer diameter of the portion, and at least one of the end portions of the arc tube is sealed with a sealing material and a conductor in which the electrode and the external lead wire are integrated. The length L1 of the end portion and the length L2 of the joint portion between the end portion of the arc tube and the conductor made of a sealing material are 2 mm ≦ L2 ≦ 20.
mm and 4 mm ≦ L1−L2 ≦ 20 mm.
ｍ≦Ｌ３≦５ｍｍとすることを特徴とする請求項１記載
の高圧放電灯。2. The minimum inner diameter L3 of the arc tube end is 0.2 m
The high pressure discharge lamp according to claim 1, wherein m ≦ L3 ≦ 5 mm.
楕円面よりなる凹面反射鏡とを、前記高圧放電灯のア−
ク軸が前記凹面反射鏡の光軸上に位置するように配置し
た構成の照明光学装置であり、前記高圧放電灯に請求項
１または請求項２記載の高圧放電灯を用いたことを特徴
とする照明光学装置。3. A high pressure discharge lamp and a concave reflecting mirror whose reflecting surface is a parabolic surface or an elliptical surface.
A high-pressure discharge lamp according to claim 1 or 2, wherein the high-pressure discharge lamp is an illumination optical device arranged such that its axis is located on the optical axis of the concave reflecting mirror. Illumination optical device.
像形成部とからなる画像表示装置において、前記光源部
に請求項３記載の照明光学装置を用いたことを特徴とす
る画像表示装置。4. An image display device comprising a light source part having a light source and a light condensing part, and an image forming part, wherein the illumination optical device according to claim 3 is used as the light source part. apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7302557A JPH09147803A (en) | 1995-11-21 | 1995-11-21 | High pressure discharge lamp and illuminating optical device using it and image display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7302557A JPH09147803A (en) | 1995-11-21 | 1995-11-21 | High pressure discharge lamp and illuminating optical device using it and image display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09147803A true JPH09147803A (en) | 1997-06-06 |
Family
ID=17910418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7302557A Pending JPH09147803A (en) | 1995-11-21 | 1995-11-21 | High pressure discharge lamp and illuminating optical device using it and image display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09147803A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999005700A1 (en) | 1997-07-25 | 1999-02-04 | Toshiba Lighting & Technology Corporation | High-voltage discharge lamp, high-voltage discharge lamp device, and lighting device |
| GB2366908A (en) * | 2000-05-31 | 2002-03-20 | Patent Teuhand Ges Fuer Elek S | Metal halide lamp with ceramic discharge vessel |
| JP2003109543A (en) * | 2001-09-28 | 2003-04-11 | Japan Storage Battery Co Ltd | Lamp device and lamp |
| WO2003034465A1 (en) * | 2001-10-11 | 2003-04-24 | Ngk Insulators, Ltd. | Discharge tube for high-pressure discharge lamp and high-pressure discharge lamp |
| JP2004221091A (en) * | 1998-05-27 | 2004-08-05 | Ngk Insulators Ltd | Light emitting container and high pressure discharge lamp having same |
| JP2006120599A (en) * | 2004-09-21 | 2006-05-11 | Osram Melco Toshiba Lighting Kk | Metallic vapor discharge lamp and metallic vapor discharge lamp lighting device |
| DE10231127B4 (en) * | 2001-09-19 | 2008-09-25 | Toshiba Lighting & Technology Corp. | High-pressure discharge lamp and filament |
| CN101882558A (en) * | 2010-06-07 | 2010-11-10 | 高鞫 | Ceramic projection lamp |
| CN101882560A (en) * | 2010-06-07 | 2010-11-10 | 高鞫 | Efficient ceramic lamp |
| JP2011082085A (en) * | 2009-10-09 | 2011-04-21 | Iwasaki Electric Co Ltd | Metal halide lamp |
-
1995
- 1995-11-21 JP JP7302557A patent/JPH09147803A/en active Pending
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6215254B1 (en) | 1997-07-25 | 2001-04-10 | Toshiba Lighting & Technology Corporation | High-voltage discharge lamp, high-voltage discharge lamp device, and lighting device |
| EP0935278A4 (en) * | 1997-07-25 | 2002-10-09 | Toshiba Lighting & Technology | HIGH VOLTAGE DISCHARGE LAMP, DEVICE FOR HIGH VOLTAGE DISCHARGE LAMP AND LIGHTING DEVICE |
| WO1999005700A1 (en) | 1997-07-25 | 1999-02-04 | Toshiba Lighting & Technology Corporation | High-voltage discharge lamp, high-voltage discharge lamp device, and lighting device |
| JP2004221091A (en) * | 1998-05-27 | 2004-08-05 | Ngk Insulators Ltd | Light emitting container and high pressure discharge lamp having same |
| GB2366908A (en) * | 2000-05-31 | 2002-03-20 | Patent Teuhand Ges Fuer Elek S | Metal halide lamp with ceramic discharge vessel |
| GB2366908B (en) * | 2000-05-31 | 2004-11-03 | Patent Teuhand Ges Fuer Elek S | Metal haldie lamp with ceramic discharge vessel |
| DE10231127B4 (en) * | 2001-09-19 | 2008-09-25 | Toshiba Lighting & Technology Corp. | High-pressure discharge lamp and filament |
| JP2003109543A (en) * | 2001-09-28 | 2003-04-11 | Japan Storage Battery Co Ltd | Lamp device and lamp |
| WO2003034465A1 (en) * | 2001-10-11 | 2003-04-24 | Ngk Insulators, Ltd. | Discharge tube for high-pressure discharge lamp and high-pressure discharge lamp |
| US7057348B2 (en) | 2001-10-11 | 2006-06-06 | Ngk Insulators, Ltd. | Discharge tube for high-pressure discharge lamp and high-pressure discharge lamp |
| CN1319111C (en) * | 2001-10-11 | 2007-05-30 | 日本碍子株式会社 | Discharge tube for high-pressure discharge lamp and high-pressure discharge lamp |
| JP2006120599A (en) * | 2004-09-21 | 2006-05-11 | Osram Melco Toshiba Lighting Kk | Metallic vapor discharge lamp and metallic vapor discharge lamp lighting device |
| JP2011082085A (en) * | 2009-10-09 | 2011-04-21 | Iwasaki Electric Co Ltd | Metal halide lamp |
| CN101882558A (en) * | 2010-06-07 | 2010-11-10 | 高鞫 | Ceramic projection lamp |
| CN101882560A (en) * | 2010-06-07 | 2010-11-10 | 高鞫 | Efficient ceramic lamp |
| WO2011153795A1 (en) * | 2010-06-07 | 2011-12-15 | 潮州市灿源电光源有限公司 | High-efficiency ceramic lamp |
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