JPH03230404A - Metal halide lamp - Google Patents
Metal halide lampInfo
- Publication number
- JPH03230404A JPH03230404A JP2208290A JP2208290A JPH03230404A JP H03230404 A JPH03230404 A JP H03230404A JP 2208290 A JP2208290 A JP 2208290A JP 2208290 A JP2208290 A JP 2208290A JP H03230404 A JPH03230404 A JP H03230404A
- Authority
- JP
- Japan
- Prior art keywords
- arc
- metal halide
- reflector
- center
- tube
- 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
- 229910001507 metal halide Inorganic materials 0.000 title claims abstract description 29
- 150000005309 metal halides Chemical class 0.000 title claims abstract description 29
- 230000004907 flux Effects 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 5
- 230000006866 deterioration Effects 0.000 abstract description 3
- 239000011521 glass Substances 0.000 abstract 1
- 239000010453 quartz Substances 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 150000004820 halides Chemical class 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical group [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 2
- XQPRBTXUXXVTKB-UHFFFAOYSA-M caesium iodide Chemical compound [I-].[Cs+] XQPRBTXUXXVTKB-UHFFFAOYSA-M 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 150000004694 iodide salts Chemical class 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- HEPLMSKRHVKCAQ-UHFFFAOYSA-N lead nickel Chemical compound [Ni].[Pb] HEPLMSKRHVKCAQ-UHFFFAOYSA-N 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- DKSXWSAKLYQPQE-UHFFFAOYSA-K neodymium(3+);triiodide Chemical compound I[Nd](I)I DKSXWSAKLYQPQE-UHFFFAOYSA-K 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)
- Optical Elements Other Than Lenses (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、メタルハライドランプ装置に関し、特に反
射板を備え光学的に限定した区域に配光させる比較的小
形の映像用光源等として用いられるメタルハライドラン
プ装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a metal halide lamp device, and particularly to a metal halide lamp device that is equipped with a reflector and used as a relatively small video light source that distributes light in an optically limited area. Related to lamp devices.
従来、外管を用いることなく発光管と反射板とを一体的
にあるいは取り外し可能に組み合わせて構成した小形の
ショートアークメタルハライドランプは、その色の良さ
と発光効率が大きいことなどの特徴により、オーバーへ
ノドブロジェクタや、オーバーへ、ドタイブのプロジェ
クションテレビ映写機等に使用され、普及しつつある。Conventionally, small short-arc metal halide lamps, which are constructed by integrally or removably combining an arc tube and a reflector without using an outer tube, have been overused due to their good color and high luminous efficiency. It is used in Henodo projectors, over-the-top projection television projectors, etc., and is becoming popular.
これらの装置は、更に小形化されつつあり、その光源と
して用いられるメタルハライドランプは装置の都合上、
水平に点灯される度合が増えつつある。従来、このよう
な装置に用いられるメタルハライドランプは、例えば定
格ランプ電力１５０Ｗのものでは、電極間距離５閣、最
大径φ１１■、同内径φ８．８ｍｍのほぼ球形の発光管
に、所定のランプ電圧となるように水銀と始動補助ガス
としてのアルゴンを約１５０ Ｌｏｒｒ封入する他に、
沃化ディスプロンラムと沃化ネオジムと沃化セシウムを
それぞれ重量比で４：２：３に選定し内容積０．４ｃｃ
に対し０．５■を封入して構成されている。These devices are becoming more compact, and the metal halide lamps used as their light sources are
The degree of horizontal lighting is increasing. Conventionally, metal halide lamps used in such devices, for example those with a rated lamp power of 150 W, have a nearly spherical arc tube with a distance between electrodes of 5 cm, a maximum diameter of φ11 mm, and an inner diameter of φ8.8 mm, and a predetermined lamp voltage. In addition to filling approximately 150 Lorr of mercury and argon as a starting auxiliary gas,
Iodized dispronlum, neodymium iodide, and cesium iodide were selected in a weight ratio of 4:2:3, and the internal volume was 0.4cc.
It is constructed by enclosing 0.5 .mu.
そしてこのように構成したいわゆるソヨートアクタイプ
のメタルハライドランプを水平点灯すると、安定したア
ーク状態では、第４図に示すように、発光管ａの両端部
に設けられた電ｉｂ、ｂ’間を結ぶ管軸Ｃより０．２閣
程度上側にアークｄの中心ｄ′が発生する。したがって
発光管ａの管軸Ｃに反射板の中心軸を合わせて反射板を
設けると、例えば放物面反射板をミラーとするものでは
、スクリーン上に照射した場合、下部が明るく上部の暗
い上下非対称の画面が形成される。このようにスクリー
ン上で大きな照度むらが生ずると画質の点で大きな問題
となる。When a metal halide lamp of the so-called Soyoto ac type constructed in this way is lit horizontally, in a stable arc state, the electric currents ib and b' provided at both ends of the arc tube a are connected as shown in Fig. The center d' of the arc d occurs approximately 0.2 degrees above the connecting pipe axis C. Therefore, if a reflector is provided with the central axis of the reflector aligned with the tube axis C of the arc tube a, for example, if a parabolic reflector is used as a mirror, when irradiating the screen, the lower part will be bright and the upper part will be dark. An asymmetrical screen is formed. When such large illuminance unevenness occurs on the screen, it becomes a big problem in terms of image quality.
この問題を解決すべ（、実開昭６３−３３５０１号にお
いて提案されているように、浮上したアークの実効的な
中心に反射板の中心軸を合わせて、スクリーン上での配
光を測定したところ、上下照度むらは殆ど生しないこと
が判明した。また発光管を反射板に傾けて配置しても、
反射板の中心軸にアークの実効的な中心を合わせれば、
同様に配光むらが生しないことも確かめられた。This problem can be solved by aligning the central axis of the reflector with the effective center of the floating arc and measuring the light distribution on the screen, as proposed in Utility Model Application No. 63-33501. It was found that there was almost no unevenness in vertical illuminance.Also, even if the arc tube was placed tilted toward the reflector,
If the effective center of the arc is aligned with the central axis of the reflector,
Similarly, it was confirmed that uneven light distribution did not occur.
〔発明が解決しようとする課題］
ところで、このようにランプの浮上したアークの実効的
な中心を反射板の中心軸に合わせて構成したメタルハラ
イドランプの寿命試験を、発光管の管軸に反射板の中心
軸を合わせて構成した比較例と共に行ったところ、第１
図に示すような結果が得られた。なお寿命試験は、第２
閏に示すように、光源より２ｍＪｉＩれた４０インチの
スクリーンの画面上の９点の平均照度の変化を測定して
行い（測定点はｅ印で示している）、第１図の曲線Ａは
発光管のアークの実効的な中心と反射板の中心軸とを合
わせたもの、曲線Ｂは発光管の管軸と反射板の中心軸と
を合わせたものの測定結果を示している。[Problems to be Solved by the Invention] By the way, the life test of a metal halide lamp configured such that the effective center of the floating arc of the lamp is aligned with the central axis of the reflector was carried out by placing the reflector on the axis of the arc tube. When we conducted this together with a comparative example configured by aligning the center axes of the
The results shown in the figure were obtained. The life test is the second
As shown in the leap, the change in average illuminance at nine points on a 40-inch screen located 2 mJI from the light source was measured (the measurement points are marked e), and the curve A in Figure 1 is Curve B shows the measurement result of the combination of the effective center of the arc of the arc tube and the central axis of the reflector, and curve B shows the measurement result of the combination of the tube axis of the arc tube and the central axis of the reflector.
曲線ＡとＢとを比較して判るように、確かに初期の平均
照度は、発光管のアーク中心に反射板の中心軸を合わせ
たものの方がよいが、短時間の点灯後、両者とも急激に
低下しあまり差がなくほぼ同じ平均照度になり、しかも
両者ともスクリーン光束維持率がよくないことが判明し
た。As can be seen by comparing curves A and B, it is true that the initial average illuminance is better when the central axis of the reflector is aligned with the arc center of the arc tube, but after being turned on for a short time, both of them rapidly decrease. It was found that the average illuminance was almost the same without much difference, and that the screen luminous flux maintenance rate of both was poor.
本発明は、従来の反射板付のメタルハライドランプの上
記問題点を解決するためなされたもので、照射面のむら
を解消すると共に、寿命中も照度むらが少なく且つ照度
劣化の少ないメタルハライドランプ装置を提供すること
を目的とする。The present invention was made in order to solve the above-mentioned problems of the conventional metal halide lamp with a reflector plate, and provides a metal halide lamp device that eliminates the unevenness of the irradiation surface, has less unevenness in illuminance, and has less deterioration in illuminance during its life. The purpose is to
〔課題を解決するための手段及び作用］上記問題点を解
決するため、なぜ従来の構成の反射板付のメタルハライ
ドランプのスクリーン光束維持率が悪いのかを検討した
結果、短時間の点灯後、発光管のアークが初期に位置し
ていた部分から更に上方へ浮上するように移動し、それ
により前記実開昭６３−３３５０１号に開示されている
ように発光管のアーク中心に反射板の中心軸を合わせて
配置しても、極めて初期の間しか効果を奏しないことが
判明した。[Means and effects for solving the problem] In order to solve the above problems, we investigated why the screen luminous flux maintenance rate of metal halide lamps with a conventional configuration with a reflector was poor. The arc moves further upward from its initial position, and as a result, as disclosed in the aforementioned Utility Model Application Publication No. 63-33501, the central axis of the reflector is aligned with the arc center of the arc tube. It has been found that even when placed together, it is only effective for a very early period.
短時間の点灯後、発光管のアークが更に上方へ浮上する
ように移動するのは、メタルハライドランプの発光管は
壁面負荷の高い石英管にメタルハライドを封入したもの
であるため、短時間のうちにハライドが石英と反応し、
ハロゲンが発生してアークを絞ることによって、アーク
周辺の温度に比ベアーク温度が上昇し、その結果アーク
中心部が上部へ浮上するものと考えられる。After lighting for a short time, the arc of the arc tube moves further upwards because the arc tube of a metal halide lamp is a quartz tube filled with metal halide, which has a high wall load. Halide reacts with quartz,
It is thought that by generating halogen and narrowing the arc, the bare arc temperature increases relative to the temperature around the arc, and as a result, the center of the arc floats upward.
したがって本発明は、メタルハライドランプを、水平点
灯時における発光管の弧状のアーク中心が反射板の中心
軸より下方に位置するように、反射板の前面に配置して
メタルハライドランプ装置を構成するものである。Therefore, the present invention constitutes a metal halide lamp device by arranging the metal halide lamp in front of a reflector so that the arc center of the arc tube during horizontal lighting is located below the central axis of the reflector. be.
このように構成したメタルハライドランプ装置の寿命試
験を行ったところ、第１図において曲線Ｃで示すような
結果が得られた。すなわち点灯初期においては、平均照
度は従来のものに比べ僅かに低いが極めて短時間後には
、従来のものとほぼ同じ照度レベルに達し、その後は漸
減し、従来のものに比べ平均照度特性は著しく優位であ
ることが判る。また点灯初期に平均照度が従来のものに
比べあまり低下していないのは、点灯初期の発光管にお
いては、ハライドが未だ石英とあまり反応していないた
めアークの幅が太く、しかもアークの中心は浮上するが
アーク温度の径方向の分布では、下側は比較的緩やかな
分布をしているため、アーク中心より下側の発光はアー
ク中心より上方の発光に比較し充分大きいためである。When a life test was conducted on the metal halide lamp device constructed in this way, the results shown by curve C in FIG. 1 were obtained. In other words, at the initial stage of lighting, the average illuminance is slightly lower than that of the conventional one, but after a very short period of time, it reaches almost the same illuminance level as the conventional one, and after that it gradually decreases, and the average illuminance characteristics are significantly lower than that of the conventional one. It turns out that it has an advantage. Also, the reason why the average illuminance at the beginning of lighting does not decrease much compared to the conventional one is that in the arc tube at the beginning of lighting, the halide has not yet reacted much with quartz, so the width of the arc is thick, and the center of the arc is This is because the distribution of the arc temperature in the radial direction is relatively gentle on the lower side, so the light emission below the arc center is sufficiently larger than the light emission above the arc center.
［実施例］
次に実施例について説明する。第２閲は、本発明に係る
メタルハライドランプ装置の一実施例の一部を破断して
示す斜視図である。図において、■は石英風袋からなる
発光管で、該発光管１内には、その両端に電極２，２′
が設けられている。[Example] Next, an example will be described. The second view is a partially cutaway perspective view of an embodiment of the metal halide lamp device according to the present invention. In the figure, ■ is an arc tube made of quartz tare, and inside the arc tube 1 there are electrodes 2, 2' at both ends.
is provided.
電極２．２′はφ０．４５ｍｍ長さ６．５ｒＭＢの１．
７％Ｔｈ０ｚ含有のタングステン芯棒に、φ０．３２ｍ
ｍ長さ２．５−の純タングステンのコイルを先端から０
．５＋＋＋ａ＋ｊ；ｆすれて密巻して形成されている。The electrode 2.2' has a diameter of 0.45 mm and a length of 6.5 rMB.
Tungsten core rod containing 7% Th0z, φ0.32m
A pure tungsten coil with a length of 2.5 m is inserted from the tip.
．． 5+++a+j; f It is formed by closely wound.
そしてこの電極２２′に溶接されてモリブデン製の幅１
．５閣長さ１２碓のエツジ付箔３，３′が石英発光管ｌ
との気密を保持するために設けられ、その延長上にφ０
．６柵のモリブデン線からなるワイヤー４．４′が外部
から電力供給のために設けられている。発光管１内には
水銀、アルゴンの他に従来のものと同様に３種の沃化物
が封入されている。そしてワイヤ４．４′はそれぞれ口
金５とニッケルリード線６に接続され、矩形波点灯可能
な電子安定器を介して定格１５０Ｗで点灯されるように
なっており、水平点灯させた場合、点灯初期においてア
ーク７の中心は発光管管軸より０．２ｍ上方へ浮上する
ようになっている。A width 1 made of molybdenum is welded to this electrode 22'.
．． The edged foils 3 and 3' with a length of 5 and 12 mm are quartz arc tubes.
It is provided to maintain airtightness with the
．． A wire 4.4' consisting of six wires of molybdenum wire is provided for the external power supply. In addition to mercury and argon, three types of iodides are sealed in the arc tube 1 as in the conventional case. The wires 4 and 4' are connected to the cap 5 and the nickel lead wire 6, respectively, and are lit at a rated power of 150W via an electronic ballast capable of rectangular wave lighting. The center of the arc 7 floats 0.2 m above the axis of the arc tube.
そしてこのように構成したメタルハライドランプの発光
管１を取り囲むようにして、硬質ガラスからなるφ９０
ｍｍ、 ｆ ＝１５の放物面コールドミラーの反射板
８が、発光管ｌのアーク部分における管軸位置に対して
反射板８の中心軸９が１．４ｍ上方に位置するように取
り付けられている。そしてこのように発光管１に反射板
８を取り付けた場合、点灯初期の発光管ｌのアーク７の
実効的な中心は反射板８の中心軸９より１．２−下方に
位置していることになる。Then, surrounding the arc tube 1 of the metal halide lamp constructed in this way, a φ90
A parabolic cold mirror reflector 8 of mm, f = 15 is installed so that the central axis 9 of the reflector 8 is located 1.4 m above the tube axis position in the arc portion of the arc tube l. There is. When the reflector plate 8 is attached to the arc tube 1 in this way, the effective center of the arc 7 of the arc tube l at the initial stage of lighting is located 1.2- below the central axis 9 of the reflector plate 8. become.
このように反射板を発光管に対して取り付けるには、第
３図に示すよう反射板８の中心軸部に発光管取付穴１０
を設け、発光管１のアーク７の中心が反射板８の所定位
置にくるように、発光管１を傾斜させて取り付けてもよ
いし、また反射板の発光管取付穴を、水平点灯させるよ
うに発光管を取り付けた場合、発光管の管軸がその位置
にくるように予め反射板の中心軸より下方に開けておい
てもよい。To attach the reflector to the arc tube in this way, as shown in FIG.
The arc tube 1 may be installed at an angle so that the center of the arc 7 of the arc tube 1 is at a predetermined position on the reflector plate 8, or the arc tube mounting hole of the reflector plate may be installed so that the arc tube 1 is lit horizontally. When an arc tube is attached to the reflector, an opening may be made in advance below the central axis of the reflector so that the tube axis of the arc tube is at that position.
このように構成したメタルハライドランプ装置に対して
スクリーン上への照射試験を行ったところ、スクリーン
上の照度むらが少なく、しかもランプ寿命中照度劣化が
少なく、スクリーン光束維持率が著しく改善されている
ことが確認された。When we conducted an irradiation test on the screen using the metal halide lamp device configured in this way, we found that there was little unevenness in illuminance on the screen, there was little illuminance deterioration during the lamp life, and the screen luminous flux maintenance rate was significantly improved. was confirmed.
上記実施例では、反射板として放物面反射板を用いたも
のを示したが、楕円面あるいは球面反射面を用いたもの
でも同様な効果が得られ、また外管付の発光管を用いた
場合においても同様な効果が得られた。In the above example, a parabolic reflector was used as the reflector, but similar effects can be obtained using an elliptical or spherical reflector, and an arc tube with an outer tube may also be used. Similar effects were obtained in both cases.
以上実施例に基づいて説明したように、本発明によれば
、ランプ寿命中その配光を均一化しスクリーン光束維持
率を著しく向上させたメタルハライドランプ装置を容易
に提供することができる。As described above based on the embodiments, according to the present invention, it is possible to easily provide a metal halide lamp device in which the light distribution is made uniform throughout the life of the lamp and the screen luminous flux maintenance rate is significantly improved.
第１図は、本発明及び従来のメタルハライドランプ装置
の点灯時間に対する相対平均照度の変化を示す図、第２
図は、平均照度の測定方法を示す説明画、第３図は、本
発明に係るメタルハライドランプ装置の一実施例を一部
破断して示す斜視図、第４図は、メタルハライドランプ
の水平点灯時のアークの浮上状態を示す図である。
図において、１は発光管、２．２′は電極、５は口金、
６はリード線、７はアーク、８は反射板、９は反射板の
中心軸、１０は発光管取付穴を示す。FIG. 1 is a diagram showing changes in relative average illuminance with respect to lighting time of the metal halide lamp device of the present invention and the conventional metal halide lamp device, and FIG.
The figure is an explanatory drawing showing a method for measuring average illuminance, FIG. 3 is a partially cutaway perspective view of an embodiment of the metal halide lamp device according to the present invention, and FIG. 4 is a diagram showing the horizontal lighting of the metal halide lamp. FIG. 3 is a diagram showing a floating state of an arc. In the figure, 1 is an arc tube, 2.2' is an electrode, 5 is a base,
6 is a lead wire, 7 is an arc, 8 is a reflector, 9 is a central axis of the reflector, and 10 is an arc tube mounting hole.
Claims (1)
射板と、水平点灯時における電極間の弧状のアークの中
心が前記反射板の中心軸より下方に位置するように前記
反射板の前面に配置したメタルハライドランプとからな
ることを特徴とするメタルハライドランプ装置。 ２、前記反射板とメタルハライドランプとを一体的に構
成したことを特徴とする請求項１記載のメタルハライド
ランプ装置。[Claims] 1. The center of an arc between a reflector having a reflective surface such as a paraboloid, an ellipsoid, or a spherical surface and an electrode during horizontal lighting is located below the central axis of the reflector. A metal halide lamp device comprising: a metal halide lamp disposed in front of the reflector. 2. The metal halide lamp device according to claim 1, wherein the reflector and the metal halide lamp are integrally constructed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2208290A JPH03230404A (en) | 1990-02-02 | 1990-02-02 | Metal halide lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2208290A JPH03230404A (en) | 1990-02-02 | 1990-02-02 | Metal halide lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03230404A true JPH03230404A (en) | 1991-10-14 |
Family
ID=12072958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2208290A Pending JPH03230404A (en) | 1990-02-02 | 1990-02-02 | Metal halide lamp |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03230404A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014167406A1 (en) * | 2013-04-09 | 2014-10-16 | 株式会社オーク製作所 | Light source device, and exposure device provided with light source device |
-
1990
- 1990-02-02 JP JP2208290A patent/JPH03230404A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014167406A1 (en) * | 2013-04-09 | 2014-10-16 | 株式会社オーク製作所 | Light source device, and exposure device provided with light source device |
| CN105144340A (en) * | 2013-04-09 | 2015-12-09 | 株式会社Orc制作所 | Light source device, and exposure device provided with light source device |
| KR20150143451A (en) * | 2013-04-09 | 2015-12-23 | 가부시키가이샤 오크세이사쿠쇼 | Light source device, and exposure device provided with the light source device |
| JPWO2014167406A1 (en) * | 2013-04-09 | 2017-02-16 | 株式会社オーク製作所 | Light source device and exposure apparatus provided with light source device |
| TWI609247B (en) * | 2013-04-09 | 2017-12-21 | Orc Manufacturing Co Ltd | Light source apparatus and exposure apparatus including the light source apparatus |
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