JPH0464140B2 - - Google Patents
Info
- Publication number
- JPH0464140B2 JPH0464140B2 JP4724384A JP4724384A JPH0464140B2 JP H0464140 B2 JPH0464140 B2 JP H0464140B2 JP 4724384 A JP4724384 A JP 4724384A JP 4724384 A JP4724384 A JP 4724384A JP H0464140 B2 JPH0464140 B2 JP H0464140B2
- Authority
- JP
- Japan
- Prior art keywords
- arc tube
- light
- sealed
- film
- light diffusing
- 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
Links
- 238000007789 sealing Methods 0.000 claims description 24
- 238000009792 diffusion process Methods 0.000 claims description 19
- 229910052751 metal Inorganic materials 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 16
- 239000012212 insulator Substances 0.000 claims description 3
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 3
- 229910052753 mercury Inorganic materials 0.000 claims description 3
- 241000255925 Diptera Species 0.000 claims 1
- 239000000945 filler Substances 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 27
- 238000009826 distribution Methods 0.000 description 15
- 239000000377 silicon dioxide Substances 0.000 description 10
- 229910001507 metal halide Inorganic materials 0.000 description 8
- 150000005309 metal halides Chemical class 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000004020 conductor Substances 0.000 description 4
- 239000011888 foil Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- 238000009877 rendering Methods 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- HUIHCQPFSRNMNM-UHFFFAOYSA-K scandium(3+);triiodide Chemical compound [Sc+3].[I-].[I-].[I-] HUIHCQPFSRNMNM-UHFFFAOYSA-K 0.000 description 1
- 238000000926 separation method 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
- H01J61/35—Vessels; Containers provided with coatings on the walls thereof; Selection of materials for the coatings
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
Description
【発明の詳細な説明】 〔発明の技術分野〕 本発明は小形金属蒸気放電灯に関する。[Detailed description of the invention] [Technical field of invention] The present invention relates to a compact metal vapor discharge lamp.
近年省エネルギーの見地から、従来一般家庭等
の屋内用照明に多用されていた白熱電球に替わ
り、高効率で高演色性の小形金属蒸気放電灯たと
えば小形メタルハライドランプの開発が要請され
ている。
In recent years, from the standpoint of energy conservation, there has been a demand for the development of compact metal vapor discharge lamps with high efficiency and high color rendering properties, such as compact metal halide lamps, in place of incandescent light bulbs, which have traditionally been widely used for indoor lighting in general households.
従来においては200W以上の中、大形メタルハ
ライドランプが既に知られているが、これら中、
大形メタルハライドランプは光束値が白熱電球に
比べて格段に高く、演色性を要求される屋内で使
用されるとしても光量が多く活用できるように比
較的高い場所に設置して使用されている。しかし
ながら100W以下の小形になつてくると、白熱電
球と同様に比較的低い場所から直接被照射体を照
射してこの被照射体をきわだたせるような使用形
態が生じてくる。このため、従来の中、大形メタ
ルハライドランプにおいては大して重要とされな
かつた配光、特に直下照度がかなり大きな問題と
して考慮されなければならない。 Conventionally, large metal halide lamps of 200W or more are already known, but among these,
Large metal halide lamps have a much higher luminous flux value than incandescent bulbs, and even when used indoors where color rendering is required, they are installed in relatively high places so that they can utilize a large amount of light. However, as light bulbs become smaller and weigh less than 100W, they are used in a manner similar to incandescent light bulbs, in which the irradiated object is directly irradiated from a relatively low place to make the irradiated object stand out. For this reason, light distribution, particularly direct illuminance, which has not been considered very important in large metal halide lamps in the past, must be considered as a very important issue.
一般に高圧金属蒸気放電灯は、両端に相対する
電極を封着した発光管構造を有しており、屋内照
明としては両端封着部が上下方向の姿勢となる垂
直点灯で使用されることが多く、両電極間の高圧
放電によつて発せられる可視光により明るさを得
ている。したがつて放電空間から発せられる可視
光は封着部方向では明るさが減じられるものであ
り、この封着部による配光の不均一さは従来から
問題とされていたが、点灯位置が被照射体よりか
なり高位置に設置されることおよび複数個のラン
プと並併用されることなどにより、被照射面の照
度分布はかなり均等にすることができた。 Generally, high-pressure metal vapor discharge lamps have an arc tube structure with opposite electrodes sealed at both ends, and are often used for indoor lighting in vertical lighting, with the sealed ends facing up and down. , the brightness is obtained from visible light emitted by high-pressure discharge between both electrodes. Therefore, the brightness of the visible light emitted from the discharge space is reduced in the direction of the sealed area, and the unevenness of light distribution due to this sealed area has long been considered a problem. By being installed at a position considerably higher than the irradiator and by using multiple lamps in parallel, we were able to make the illuminance distribution on the irradiated surface fairly uniform.
しかしながら本発明で対象としている小形金属
蒸気放電灯のように、直接被照射体を照射し、か
つ一般家庭のごとく比較的低い位置に設置されて
点灯されるものでは、従来構造のままであると被
照射体に明るさのむらを発生する不具合を生じ
る。 However, in the case of a small metal vapor discharge lamp, which is the object of the present invention, which directly irradiates the object to be irradiated and is installed and lit at a relatively low position such as in a general household, the conventional structure may remain the same. This causes a problem of uneven brightness on the irradiated object.
本発明は上記事情を考慮してなされたもので、
発光効率を損うことなく配光特性の均一化が可能
な小形金属蒸気放電灯を提供することを目的とす
る。
The present invention was made in consideration of the above circumstances, and
An object of the present invention is to provide a small metal vapor discharge lamp that can uniformize light distribution characteristics without impairing luminous efficiency.
本発明の小形金属蒸気放電灯は発光管の内面を
光拡散膜で被覆し、かつ発光管の少なくとも一方
の封着部近傍の内面は発光管の主部の内面よりも
光拡散膜を薄く被覆するか、または光拡散膜を設
けないようにすることによつて、発光部の主部内
面における反射光を発光管の封着部近傍から発光
管外へ放射させるようにしたことによつて配光特
性を改善したものである。
In the small metal vapor discharge lamp of the present invention, the inner surface of the arc tube is coated with a light diffusing film, and the inner surface near the sealing part on at least one side of the arc tube is coated with the light diffusing film thinner than the inner surface of the main part of the arc tube. Or, by not providing a light diffusion film, the reflected light on the inner surface of the main part of the light emitting part is radiated outside the arc tube from near the sealed part of the arc tube. It has improved optical characteristics.
以下、本発明の小形金属蒸気放電灯の一実施例
を図面を参照して説明する。
EMBODIMENT OF THE INVENTION Hereinafter, one embodiment of the small metal vapor discharge lamp of the present invention will be described with reference to the drawings.
図において発光管１は透光性耐熱絶縁物たとえ
ば石英ガラスからなる発光管バルブ１ａの両端に
タングステン等の高融点金属からなる電極２，３
を５mmの距離を隔だてて封着してある。電極２，
３はモリブデン等の金属箔導体４，４に接続され
ており、これら金属箔導体４，４は発光管１の両
端部に形成した封着部５，５内に封着されてい
る。金属箔導体４，４はウエルズ６，６に接続さ
れており、これらウエルズ６，６を介して電極
２，３に電圧が印加される。発光管バルブ１ａは
その放電空間部分が内径約８mmの球状もしくは楕
円球状となるように、たとえば膨出成形されてお
り、放電空間内におけるガスの対流を円滑に生じ
せしめるようになつている。また発光管１内には
水銀と、始動用希ガスと、発光金属としての金属
ハロゲン化物、たとえば沃化スカンジウムが封入
されている。 In the figure, an arc tube 1 is made of a light-transmitting heat-resistant insulator such as quartz glass, and electrodes 2 and 3 made of a high-melting point metal such as tungsten are attached to both ends of the arc tube bulb 1a.
are sealed at a distance of 5 mm. electrode 2,
3 is connected to metal foil conductors 4, 4 made of molybdenum or the like, and these metal foil conductors 4, 4 are sealed in sealing parts 5, 5 formed at both ends of the arc tube 1. The metal foil conductors 4, 4 are connected to wells 6, 6, and a voltage is applied to the electrodes 2, 3 via these wells 6, 6. The arc tube bulb 1a is bulged, for example, so that its discharge space has a spherical or ellipsoidal shape with an inner diameter of about 8 mm, and is designed to smoothly generate gas convection within the discharge space. Further, the arc tube 1 is filled with mercury, a starting rare gas, and a metal halide as a luminescent metal, such as scandium iodide.
発光管１は外管７内に収容され、外管７は白熱
電球と同様な形状および大きさを有し、一端にね
じ込み形口金８を被着してある。外管７のステム
９にはリード線１０ａ，１０ｂが封着されてお
り、一方のリード線１０ａには支持線１１を介し
て一方の電極２が接続されているとともに、他方
のリード線１０ｂには発光管１から遠ざかるよう
に弓形に曲成された導電ワイヤ１２を介して他方
の電極３が接続されている。なお外管７内は真空
もしくは窒素あるいは不活性ガスの雰囲気に保た
れており、また口金８には端子８ａが設けられて
いる。 The arc tube 1 is housed in an outer bulb 7, which has a shape and size similar to an incandescent light bulb, and has a screw cap 8 attached to one end. Lead wires 10a and 10b are sealed to the stem 9 of the outer tube 7, one electrode 2 is connected to one lead wire 10a via a support wire 11, and the other lead wire 10b is connected to one electrode 2 via a support wire 11. is connected to the other electrode 3 via a conductive wire 12 which is bent into an arcuate shape so as to move away from the arc tube 1. The inside of the outer tube 7 is maintained in a vacuum or an atmosphere of nitrogen or inert gas, and the base 8 is provided with a terminal 8a.
しかして発光管１は第２図に示されるように、
石英ガラス製の発光管バルブ１ａの内面は光拡散
物質たとえばシリカSiO2微粉末からなる光拡散
膜１３で被覆され、かつ光拡散膜１３は封着部
５，５の近傍部１４では発光管の主部１５よりも
約1/4の厚さに薄く形成されている。なお、発光
管の主部１５とは電極２と３との先端間距離つま
りアーク長に対応する管壁部分を指し、封着部
５，５の近傍部１４とは上記主部以外の管壁部分
つまり電極２，３の先端部から封着部５，５にか
けての管壁部分を指すものである。このような構
造の小形メタルハライドランプを点灯すると、ア
ークから発生した光の多くはアークに対応する発
光管管壁部すなわち上記発光管１の主部１５に達
し、上記発生した光の少量は発光管１の封着部
５，５の近傍部１４に達する。しかして、発光管
１の主部１５に達した光の一部は光拡散膜１３に
よつて多重反射されて上記封着部５，５の近傍部
１４に達する。ところで、この近傍部１４は発光
管主部１５に比較して光拡散膜１３は薄く形成さ
れるか、または光拡散膜１３を設けていないの
で、上記多重反射光およびアークから直接上記近
傍部１４に達した光はその大部分が発光管管壁を
透過して発光管外へ放射される。したがつて、発
光管内面に光拡散膜を設けないもの、あるいは光
拡散膜を全内面に均一に設けたもの等に比較して
発光管の封着部５，５方向への光量を増加するこ
とができ、発光管１を垂直位置で点灯した場合に
その直下限度を増して配光特性を改善することが
できるものである。 As shown in FIG. 2, the arc tube 1 is
The inner surface of the arc tube bulb 1a made of quartz glass is coated with a light diffusing film 13 made of a light diffusing substance such as silica SiO 2 fine powder, and the light diffusing film 13 covers the arc tube in the vicinity of the sealing parts 5, 5. It is formed thinner than the main portion 15 with a thickness of about 1/4. The main part 15 of the arc tube refers to the part of the tube wall corresponding to the distance between the tips of the electrodes 2 and 3, that is, the arc length, and the part 14 near the sealing parts 5, 5 refers to the part of the tube wall other than the main part. This section refers to the tube wall section from the tips of the electrodes 2 and 3 to the sealing sections 5 and 5. When a small metal halide lamp with such a structure is lit, most of the light generated from the arc reaches the arc tube wall portion corresponding to the arc, that is, the main portion 15 of the arc tube 1, and a small amount of the generated light reaches the arc tube wall portion corresponding to the arc, that is, the main portion 15 of the arc tube 1. It reaches the vicinity part 14 of the sealed parts 5, 5 of 1. A portion of the light that has reached the main portion 15 of the arc tube 1 is reflected multiple times by the light diffusion film 13 and reaches the portion 14 near the sealing portions 5, 5. By the way, since the light diffusing film 13 is formed thinner than the main part 15 of the arc tube or the light diffusing film 13 is not provided in the neighboring part 14, the multiple reflected light and the arc are directly transmitted to the neighboring part 14. Most of the light that reaches the arc tube passes through the wall of the arc tube and is emitted outside the arc tube. Therefore, the amount of light directed toward the sealed portions 5 and 5 of the arc tube is increased compared to those in which a light diffusion film is not provided on the inner surface of the arc tube, or in which a light diffusion film is uniformly provided on the entire inner surface of the arc tube. When the arc tube 1 is lit in a vertical position, the direct lower limit can be increased and the light distribution characteristics can be improved.
さらに一般に発光管１を収容する外管７は内面
にけい光体もしくはシリカ等の光拡散物質を塗布
して拡散タイプとするか、あるいは拡散物質を塗
布しない透明（クリア）タイプとされる。拡散タ
イプの場合には透明タイプに較べて配光特性がか
なり均一化されることは知られている。しかしな
がら本発明による発光管の配光分布は、拡散タイ
プの外管を使用しても何ら打ち消されるものでは
なく、従来のものに較べて依然として優位性をも
つものであるから、外管については何ら制約され
るものではない。 Furthermore, generally, the outer tube 7 housing the arc tube 1 is made into a diffusion type by coating the inner surface with a light diffusing substance such as phosphor or silica, or it is made into a transparent type without coating with a diffusion substance. It is known that in the case of a diffused type, the light distribution characteristics are much more uniform than in a transparent type. However, the light distribution of the arc tube according to the present invention is not canceled out in any way by the use of a diffused type outer tube, and is still superior to conventional ones, so there is nothing to be said about the outer tube. There are no restrictions.
第３図は上記実施例ランプ（実線で示す。）と
発光管１に光拡散膜１３を設けない従来ランプ
（破線で示す。）の1000lm当りの照度（cd）の配
光分布の特性図で、ランプを口金側を上にした垂
直点灯した場合のものである。図から判るように
配光分布の上方はランプの口金８が存在するので
両者の間にほとんど差はないが、実施例ランプは
水平方向の照度は僅かに減少するものの直下照度
においては従来ランプの約３倍にも上昇してお
り、配光分布が均一化される方向に改善されてい
ることが顕著に現われている。 FIG. 3 is a characteristic diagram of the light distribution of illuminance (cd) per 1000 lm of the above-mentioned example lamp (indicated by a solid line) and a conventional lamp (indicated by a broken line) in which the light diffusion film 13 is not provided on the arc tube 1. , when the lamp is lit vertically with the base side up. As can be seen from the figure, there is almost no difference between the two because the lamp base 8 is present at the top of the light distribution, but although the illuminance of the example lamp is slightly reduced in the horizontal direction, the illuminance directly below is lower than that of the conventional lamp. It has increased by about 3 times, which clearly shows that the light distribution has been improved toward becoming more uniform.
なお、このような効果は電極の離間距離が20mm
以下の場合には全て得てられるものであるが、特
にその距離が短いものほど効果は大きく現われ
る。たとえば15〜20mmのものでは直下照度で約２
〜３倍、３〜５mmのものでは約３〜４倍も従来ラ
ンプより向上できる。 Note that this effect occurs when the electrode separation distance is 20 mm.
All of the following cases can be obtained, but the shorter the distance, the greater the effect appears. For example, for a 15-20mm model, the direct illuminance is approximately 2
It can be improved by ~3 times, and for 3 to 5 mm, it can be improved by about 3 to 4 times compared to conventional lamps.
また発光管１の主部１５と封着部の近傍部１４
における光拡散膜１３の膜厚の差は大きいほど封
着部５，５方向への光量を増すことができるが、
主部１５の光拡散膜１３の膜厚が厚すぎるとこの
主部１５から発光管外へ放射される光量が大巾に
減少するので好ましくなく、その膜厚は光透過率
で90％以上におさえる必要がある。さらに封着部
の近傍部１４の膜厚は主部１５の膜厚の1/2以下
または全く光拡散膜１３を設けないようにするこ
とが好ましく、主部１５の膜厚には多少のむらが
あつてもこの主部１５における光量は封着部の近
傍部１４に較べて圧倒的に多いので、配光のむら
としては殆ど現われることはない。しかも、本発
明は発光管１の両端封着部５，５が上、下方向と
なる形態たとえば垂直点灯時における下方向に位
置する封着部側による配光の不均一さを解消する
ことを目的としているから、光拡散膜１３を薄く
または全く設けないようにするのは点灯時に下方
向となる封着部５の近傍だけでも良い。 In addition, the main part 15 of the arc tube 1 and the vicinity part 14 of the sealing part
The larger the difference in the film thickness of the light diffusion film 13 in , the more the amount of light directed toward the sealing parts 5 and 5 can be increased.
If the film thickness of the light diffusion film 13 of the main part 15 is too thick, the amount of light emitted from the main part 15 to the outside of the arc tube will be greatly reduced, which is undesirable. I need to hold it down. Furthermore, it is preferable that the film thickness of the area 14 near the sealing part be less than 1/2 of the film thickness of the main part 15 or that no light diffusing film 13 be provided at all, so that the film thickness of the main part 15 may be slightly uneven. Even if there is, the amount of light in the main portion 15 is overwhelmingly greater than in the portion 14 near the sealing portion, so it hardly appears as uneven light distribution. Moreover, the present invention solves the non-uniformity of light distribution due to the side of the sealed portion located downward when the arc tube 1 is in a configuration in which the sealed portions 5, 5 at both ends are directed upward and downward, for example, during vertical lighting. Since this is the purpose, the light diffusion film 13 may be thin or not provided at all only in the vicinity of the sealing portion 5 which faces downward during lighting.
なお、上記実施例はメタルハライドランプにつ
いて述べたが、水銀ランプ等の他の小形金属蒸気
放電灯についても本発明は適用できるものであ
る。 Although the above embodiments have been described with respect to metal halide lamps, the present invention is also applicable to other small metal vapor discharge lamps such as mercury lamps.
次に上記実施例ランプの製造に好適する製造方
法の一実施例を図面を参照して説明する。 Next, an example of a manufacturing method suitable for manufacturing the above-mentioned example lamp will be described with reference to the drawings.
第４図において１ａは中央部を膨出さして内径
８mmの球状に成形してなる石英製発光管バルブ
で、この発光管バルブ１ａの一部にレンズ１６に
より集光した炭酸ガスCO2レーザー光１７を照射
して径1.0mmの排気管取付け用の孔１８をあける。
この加工におけるレーザー光照射は300Wの連続
モードで行つたが、レーザーのエネルギー密度は
非常に高いため、照射された部分の石英ガラスは
昇華し、微粉末状のシリカSiO2となつて飛散す
る。当初シリカは発光管バルブ１ａ外へ飛散する
が、管壁に孔１８があき始めると発光管バルブ１
ａ内にも飛散する。ところで、このようなレーザ
ー照射によれば、加熱は上記孔をあける予定部だ
けの局部加熱となり、発光管バルブ１ａの大部分
はあまり温度が上昇せず、したがつて発光管バル
ブ１ａ内に飛散した高温のシリカ微粉末は低温の
発光管バルブ１ａの全内面に被着し、光拡散膜１
３を形成する。このような方法は発光管バルブが
小形であるからこそ可能なのである。 In FIG. 4, reference numeral 1a indicates a quartz arc tube bulb formed into a spherical shape with an inner diameter of 8 mm with a swollen central portion, and a carbon dioxide CO 2 laser beam 17 is focused by a lens 16 onto a part of this arc tube bulb 1a. irradiate to make a hole 18 with a diameter of 1.0 mm for installing an exhaust pipe.
The laser beam irradiation for this process was carried out in a continuous mode of 300W, but since the energy density of the laser is extremely high, the quartz glass in the irradiated area sublimated and became fine powdered silica SiO 2 and scattered. Initially, silica scatters outside the arc tube bulb 1a, but when holes 18 begin to form in the tube wall, the silica scatters outside the arc tube bulb 1a.
It also scatters inside a. By the way, according to such laser irradiation, the heating is localized only in the area where the hole is planned to be made, and the temperature of most of the arc tube bulb 1a does not rise much, so that the temperature of the majority of the arc tube bulb 1a does not rise much, and therefore, some particles are scattered inside the arc tube bulb 1a. The high-temperature fine silica powder adheres to the entire inner surface of the low-temperature arc tube bulb 1a, and the light diffusion film 1
form 3. This method is possible because the arc tube bulb is small.
また、光拡散膜１３は次の排気管取付け工程に
おいても形成される。この工程では第５図に示す
ように上記発光管バルブに設けた孔１８に加熱し
ながら石英製排気管１９の一端を融着するが、こ
の加熱時にもCO2レーザー光１７等のエネルギー
密度の高い加熱源を使用すれば、先の孔あけ工程
と同様に石英ガラスは昇華して微粉末状のシリカ
となつて発光管バルブ１ａ内に飛散し、その内面
に被着して光拡散膜１３を形成する。 Further, the light diffusion film 13 is also formed in the next exhaust pipe attachment process. In this step, as shown in FIG. 5, one end of the quartz exhaust pipe 19 is fused while heating the hole 18 provided in the arc tube bulb. If a high heat source is used, the silica glass will sublimate and become fine powdered silica, which will be scattered inside the arc tube bulb 1a and adhere to the inner surface of the light diffusing film 13, as in the previous hole-drilling process. form.
このようにして形成された光拡散膜１３は発光
管バルブ１ａの中央部（主部１５）よりも端部
（封着予定部２０の近傍部１４）方向へいくほど
薄く形成されるが、中央部、端部共に均一な厚さ
に形成されても差し支えない。すなわち、さらに
次の工程では第６図に示すように電極２，３を金
属箔導体４，４を介してウエルズ６，６に接続し
てなる電極マウントを発光管バルブ１ａの両側の
封着予定部２０，２０に配置し、この封着予定部
２０，２０を加熱圧潰することによつて上記電極
マウントを封着部５，５に封着する。この封着工
程において、封着予定部に加え、発光管端部をも
加熱することによつて、封着部５，５の近傍部１
４，１４に被着している光拡散膜１３を形成して
いるシリカは飛散してこの部分の光拡散膜１３は
発光管主部１５に被着した部分よりも薄くなるま
たは全部が飛散して光拡散膜１３が存在しない状
態にでき、所望の分布状態の光拡散膜１３を得る
ことができる。 The light diffusion film 13 formed in this manner is thinner toward the end portion (near the portion 14 of the sealing portion 20) than the center portion (main portion 15) of the arc tube bulb 1a; There is no problem even if both the portion and the end portion are formed to have a uniform thickness. That is, in the next step, as shown in FIG. 6, electrode mounts consisting of electrodes 2 and 3 connected to wells 6 and 6 via metal foil conductors 4 and 4 are scheduled to be sealed on both sides of the arc tube bulb 1a. The electrode mount is placed in the sealing parts 20, 20, and the electrode mount is sealed to the sealing parts 5, 5 by heating and crushing the parts 20, 20 to be sealed. In this sealing step, by heating the end of the arc tube in addition to the portion to be sealed,
The silica forming the light diffusing film 13 adhered to the arc tube 4 and 14 is scattered, and the light diffusing film 13 in this part becomes thinner than the part adhered to the main part 15 of the arc tube, or all of it is scattered. Thus, the light diffusing film 13 can be made to be in a state where it does not exist, and the light diffusing film 13 can be obtained in a desired distribution state.
なお、この封着工程においては発光管バルブ１
ａ内に不活性ガスまたは窒素ガスを流すかあるい
は真空中で行ない電極２，３等の酸化を防止する
ことが必要であり、また加熱温度はシリカの場合
なら1150℃以上にすれば良く、ランプになつた後
の発光管内面温度は高々1000℃であるから、その
後の光拡散膜１３の移動は生じない。 In addition, in this sealing process, the arc tube bulb 1
It is necessary to prevent oxidation of electrodes 2, 3, etc. by flowing an inert gas or nitrogen gas through the chamber or in a vacuum, and the heating temperature should be 1150°C or higher in the case of silica. Since the inner surface temperature of the arc tube is at most 1000° C., the light diffusing film 13 does not move thereafter.
さらにまた、封着部近傍部１４に被着した光拡
散膜１３を除去したり薄くするには次の排気工程
を利用することもできる。すなわち、第６図に示
す封着工程を終了した発光管は次に加熱しながら
排気管１９を介してその内部は排気されるが、こ
の排気工程時に封着部近傍部１４に被着して光拡
散膜１３を形成しているシリカが管壁から飛散す
る程度の温度になるように封着部近傍部を他の部
分より高温に加熱してやれば、この部分１４の光
拡散膜１３は薄くなるかまたはその全部が飛散し
てなくすることができる。 Furthermore, the following evacuation process can also be used to remove or thin the light diffusion film 13 attached to the sealing part vicinity part 14. That is, the arc tube which has undergone the sealing process shown in FIG. If the part near the sealing part is heated to a higher temperature than other parts so that the silica forming the light diffusing film 13 scatters from the tube wall, the light diffusing film 13 in this part 14 becomes thinner. or all of them can be scattered and lost.
このように製造方法によればたとえば石英ガラ
スのような透光性耐熱絶縁物からなる発光管バル
ブ自体の一部を加熱して昇華飛散させてその内面
に被着させることにより光拡散膜を形成すること
ができるので、工程が簡略化され、しかも光拡散
膜は発光管の内面に形成されるので、外面に形成
した場合のように以後の工程での取扱い時に光拡
散膜が剥れ落ちるような事故の発生も防止でき
る。 According to this manufacturing method, a light diffusing film is formed by heating a part of the arc tube bulb itself made of a light-transmitting heat-resistant insulator such as quartz glass, causing it to sublime and scatter, and depositing it on its inner surface. This simplifies the process, and since the light diffusing film is formed on the inner surface of the arc tube, there is no need for the light diffusing film to peel off during handling in subsequent steps, unlike when it is formed on the outer surface. It is also possible to prevent serious accidents from occurring.
さらに、上記実施例の場合のように排気管を取
付けるタイプの発光管の場合には、光拡散膜を形
成するために特別に光拡散物質を使用する必要が
なく、従来の製造工程のままで製造できる利点も
ある。 Furthermore, in the case of an arc tube with an exhaust pipe attached, as in the case of the above embodiment, there is no need to use a special light-diffusing substance to form a light-diffusing film, and the conventional manufacturing process can be used. It also has the advantage of being manufacturable.
以上詳述したように本発明の小形金属蒸気放電
灯は発光管内面に光拡散膜を設け、この光拡散膜
を発光管封着部の近傍部においては発光管主部に
おけるよりも薄く形成するか、または光拡散膜を
設けないようにしたので、発光管主部における反
射光を発光管封着部の近傍部から外部へ放射させ
ることができ、しがたつて発光効率を低下させる
ことなく直下照度を向上して配光特性を改善する
ことができる。
As detailed above, the small metal vapor discharge lamp of the present invention is provided with a light diffusion film on the inner surface of the arc tube, and this light diffusion film is formed to be thinner in the vicinity of the arc tube sealing part than in the main part of the arc tube. Alternatively, since no light diffusion film is provided, the reflected light from the main part of the arc tube can be radiated to the outside from the vicinity of the arc tube sealing part, without reducing luminous efficiency. It is possible to improve the light distribution characteristics by increasing the direct illuminance.
第１図は本発明の一実施例である小形メタルハ
ライドランプの正面図、第２図は同ランプ発光管
の縦断面図、第３図は配光分布特性図、第４図〜
第６図は本発明に好適な製造方法の一実施例を示
す製造工程別の説明図である。
１……発光管、１ａ……発光管バルブ、２，３
……電極、５，５……封着部、７……外管、１３
……光拡散膜、１４……発光管封着部の近傍部、
１５……発光管主部、１６……レンズ、１７……
レーザー光、１８……排気管取付け用孔、１９…
…排気管、２０……封着予定部。
Fig. 1 is a front view of a small metal halide lamp which is an embodiment of the present invention, Fig. 2 is a longitudinal sectional view of the lamp arc tube, Fig. 3 is a light distribution characteristic diagram, and Figs.
FIG. 6 is an explanatory diagram of each manufacturing process showing an embodiment of a manufacturing method suitable for the present invention. 1... Arc tube, 1a... Arc tube bulb, 2, 3
... Electrode, 5, 5 ... Sealing part, 7 ... Outer tube, 13
...Light diffusion film, 14...Near part of arc tube sealing part,
15... Main part of arc tube, 16... Lens, 17...
Laser light, 18... Exhaust pipe mounting hole, 19...
...Exhaust pipe, 20...Part to be sealed.
Claims (1)
端部に離間距離20mm以下の対向する一対の電極を
封着し、内部に始動用希ガスと少なくとも水銀を
含む封入物とを封入してなる発光管を有し、上記
発光管の内面は光拡散膜で被覆され、かつ、発光
管の少なくとも一方の封着部近傍の内面は発光管
の主部の内面よりも光拡散膜を薄く被覆するか、
または光拡散膜を設けないようにしたことを特徴
とする小形金属蒸気放電灯。1 A pair of opposing electrodes with a distance of 20 mm or less are sealed at both ends of an arc tube bulb made of a light-transmitting heat-resistant insulator, and a starting rare gas and a filler containing at least mercury are sealed inside. It has an arc tube, the inner surface of the arc tube is coated with a light diffusing film, and the inner surface near at least one sealing part of the arc tube is coated with the light diffusing film thinner than the inner surface of the main part of the arc tube. mosquito,
Or a small metal vapor discharge lamp characterized by not having a light diffusion film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4724384A JPS60193255A (en) | 1984-03-14 | 1984-03-14 | Small metal vapor electric-discharge lamp and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4724384A JPS60193255A (en) | 1984-03-14 | 1984-03-14 | Small metal vapor electric-discharge lamp and its manufacture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60193255A JPS60193255A (en) | 1985-10-01 |
| JPH0464140B2 true JPH0464140B2 (en) | 1992-10-14 |
Family
ID=12769784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4724384A Granted JPS60193255A (en) | 1984-03-14 | 1984-03-14 | Small metal vapor electric-discharge lamp and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60193255A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10237598A1 (en) * | 2002-08-16 | 2004-02-26 | Philips Intellectual Property & Standards Gmbh | Increasing the arcing diffusion of mercury free gas discharge lighting units is obtained by structuring inner and outer tubes |
| DE102005000660A1 (en) * | 2005-01-04 | 2006-11-09 | Schott Ag | Lighting device with a structured body |
-
1984
- 1984-03-14 JP JP4724384A patent/JPS60193255A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60193255A (en) | 1985-10-01 |
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