JPH07245085A - Metal halide lamp - Google Patents

Metal halide lamp

Info

Publication number
JPH07245085A
JPH07245085A JP3131694A JP3131694A JPH07245085A JP H07245085 A JPH07245085 A JP H07245085A JP 3131694 A JP3131694 A JP 3131694A JP 3131694 A JP3131694 A JP 3131694A JP H07245085 A JPH07245085 A JP H07245085A
Authority
JP
Japan
Prior art keywords
tube
light
lamp
light emission
emission 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
Application number
JP3131694A
Other languages
Japanese (ja)
Inventor
Fuminori Nakayama
史紀 中山
Kuniki Fukuda
国樹 福田
Shingo Tsutsumi
伸吾 堤
Seishin Shimaoka
清新 島岡
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electronics 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 Matsushita Electronics Corp filed Critical Matsushita Electronics Corp
Priority to JP3131694A priority Critical patent/JPH07245085A/en
Publication of JPH07245085A publication Critical patent/JPH07245085A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To prevent leak of reflection light in a visible zone, and restrict irregularity caused by radiation light color directions of a lamp. CONSTITUTION:A lamp has a light transmission tube 1 of quartz, and an outer tube 2 including the light emission tube 1. Inside the light emission tube l, a pair of electrodes are provided, and shock absorbing gas and halide are enclosed. A heat reflection film 3 comprising ZrO2, etc., is formed on an outer surface at each end of the light emission tube 1, and the light emission tube l is enclosed by a transparent cylinder 4 included in the outer tube 2. The light emission tube 1 has external lead wires introduced from both ends of the light emission tube 1 to be connected to stem lines 9a, 9b to be supported in the outer tube 2. On an outer surface of the cylinder 4, a multi-layer inteferrence film 5 comprising TiO2 and SiO2 is formed as a reflection film. An aperture part of the cylinder 4 at each end is closed by a cover 6 of metal.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明はメタルハライドランプに
関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal halide lamp.

【0002】[0002]

【従来の技術】メタルハライドランプは、コンパクト・
高演色になるに従って、店舗等の屋内商業エリアで頻繁
に使用される傾向にある。特に、色温度が3000〜4
000Kの白熱電球の光に近い光色を有するメタルハラ
イドランプは、暖かみがある高級な雰囲気を演出する光
源として、盛んに用いられている。
2. Description of the Related Art Metal halide lamps are compact and
As the color rendering becomes higher, it tends to be frequently used in indoor commercial areas such as stores. Especially, the color temperature is 3000-4
Metal halide lamps, which have a color close to that of an incandescent bulb of 000K, are widely used as a light source that creates a warm and high-class atmosphere.

【0003】このような電球色に近い放射光を持つメタ
ルハライドランプとしては、封入物としてハロゲン化錫
を用いたランプが知られている。しかし、ハロゲン化錫
を用いたランプは、動程中に電極の低温部が封入物によ
って激しく侵食され、電極折れを引き起こすという問題
があった。
A lamp using tin halide as an enclosure is known as such a metal halide lamp having a radiant light close to a light bulb color. However, the lamp using tin halide has a problem that the low temperature part of the electrode is severely eroded by the filling material during the travel, causing the electrode to break.

【0004】そこで、ハロゲン化錫を用いずに、高演色
で電球色に近い放射光を実現するために、発光管と外管
との間に透光性の筒を設け、その筒の表面に反射膜とし
て可視光の一部を反射する多層干渉膜を形成したランプ
が知られている(特開平2−244551号公報)。こ
のランプは、多層干渉膜の特性により任意の色温度を選
択でき、また多層干渉膜による多重反射のうちにエネル
ギーが発光管に返還され、高効率が得られる。
Therefore, in order to realize radiant light having a high color rendering and a color close to that of an electric bulb without using tin halide, a transparent tube is provided between the arc tube and the outer tube, and the surface of the tube is provided. A lamp in which a multilayer interference film that reflects a part of visible light is formed as a reflective film is known (Japanese Patent Laid-Open No. 2-244551). In this lamp, an arbitrary color temperature can be selected depending on the characteristics of the multilayer interference film, and energy is returned to the arc tube during multiple reflection by the multilayer interference film, and high efficiency can be obtained.

【0005】[0005]

【発明が解決しようとする課題】しかし、このように透
光性筒に反射膜を形成したランプには、反射膜からの選
択的な可視領域反射光が筒の両端から外部へ漏れるた
め、ランプから放射された光の光色が方向によって異な
ってしまう。このような現象によって、ランプを器具に
取付け点灯したときに、器具からの照射面に色むらが現
れるという問題があった。
However, in the lamp having the reflective film formed on the translucent tube as described above, the selective visible region reflected light from the reflective film leaks to the outside from both ends of the tube. The color of the light emitted from the light varies depending on the direction. Due to such a phenomenon, when the lamp is attached to the device and turned on, color unevenness appears on the irradiation surface from the device.

【0006】本発明は、このような問題点を解決するた
めになされたもので、電極折れを生じることがなく、可
視領域反射光の漏れを防ぎ、ランプの反射光による色む
らを抑制することのできる高演色で電球色に近い放射光
を持ったメタルハライドランプを提供することを目的と
している。
The present invention has been made in order to solve such a problem and prevents the leakage of reflected light in the visible region and suppresses the color unevenness due to the reflected light of a lamp without causing electrode breakage. It is intended to provide a metal halide lamp that has a high color rendering and a radiant light that is close to the bulb color.

【0007】[0007]

【課題を解決するための手段】本発明のメタルハライド
ランプは、内部に一対の電極を有し、かつ金属ハロゲン
化物および緩衝ガスが封入された発光管と、前記発光管
を内蔵した外管と、前記外管内において前記発光管を包
囲する少なくとも1つの透光性筒とを備え、前記筒の表
面に可視領域光の一部を反射する反射膜が形成され、か
つ前記筒の両端開口部が蓋によって閉塞された構成を有
する。
A metal halide lamp according to the present invention has an arc tube having a pair of electrodes therein, and in which a metal halide and a buffer gas are enclosed, and an outer tube containing the arc tube. At least one translucent tube surrounding the arc tube in the outer tube, a reflective film for reflecting a part of visible region light is formed on a surface of the tube, and both end openings of the tube are covered. It has a structure closed by.

【0008】[0008]

【作用】この構成により、発光管からの可視光の一部が
選択的に反射膜に反射されても、反射膜が形成されてい
る筒の両端開口部から反射光が筒の外部に漏れることが
なく、ランプからの放射光色が方向によって大きく異な
る現象を防止できる。
With this configuration, even if a part of visible light from the arc tube is selectively reflected by the reflective film, the reflected light leaks to the outside of the cylinder through the openings at both ends of the cylinder where the reflective film is formed. It is possible to prevent a phenomenon in which the color of the light emitted from the lamp greatly differs depending on the direction.

【0009】[0009]

【実施例】以下、本発明の一実施例について図面を用い
て説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

【0010】図1に示すように、本発明の一実施例であ
る100Wのメタルハライドランプは、石英製の発光管
1とこの発光管1を内蔵した外管2を有している。発光
管1の内部には、一対の電極が設けられ、緩衝ガスとし
てアルゴンが10000パスカル、Hgが12mg、D
yI3,TlIおよびCsIからなるハロゲン化物が2
mg封入されており、発光管の内径は10mmである。
発光管1の両端外面には、ZrO2 等からなる熱反射膜
3が形成されており、発光管1は、外管2に内蔵された
石英製透光性筒4に包囲されている。発光管1は外管2
内において、発光管1の両端から導出した外部リード線
がステム9から導出したステム線9a,9bとそれぞれ
接続されて支持されている。透光性筒4の外面には、反
射膜としてTiO2とSiO2とからなる多層干渉膜5が
形成されている。また、透光性筒4の両端開口部は金属
製の蓋6によって閉塞されている。筒4はステム線9
a,9bに支持体11でもって接続され外管2内に支持
されている。
As shown in FIG. 1, a 100 W metal halide lamp according to an embodiment of the present invention has a quartz arc tube 1 and an outer tube 2 containing the arc tube 1. Inside the arc tube 1, a pair of electrodes are provided. Argon as a buffer gas is 10000 Pascal, Hg is 12 mg, and D
Two halides consisting of yI 3 , TlI and CsI
mg is enclosed and the inner diameter of the arc tube is 10 mm.
A heat reflection film 3 made of ZrO 2 or the like is formed on the outer surfaces of both ends of the arc tube 1, and the arc tube 1 is surrounded by a quartz translucent tube 4 built in the outer tube 2. Arc tube 1 is outer tube 2
Inside, external lead wires led out from both ends of the arc tube 1 are connected to and supported by stem wires 9a, 9b led out of the stem 9, respectively. On the outer surface of the translucent cylinder 4, a multilayer interference film 5 made of TiO 2 and SiO 2 is formed as a reflective film. Further, both end openings of the transparent tube 4 are closed by a lid 6 made of metal. The cylinder 4 has a stem wire 9
It is connected to a and 9b by a support 11 and is supported in the outer tube 2.

【0011】なお、図1中、7は絶縁碍子、8はゲッタ
ー、10は口金をそれぞれ示す。このような、本発明実
施例のランプは、全光束が6300lm、放射光の色温
度が3560K、放射光の平均演色評価数が97の特性
を示す。
In FIG. 1, 7 is an insulator, 8 is a getter, and 10 is a base. Such a lamp of the embodiment of the present invention exhibits the characteristics that the total luminous flux is 6300 lm, the color temperature of the emitted light is 3560 K, and the average color rendering index of the emitted light is 97.

【0012】図2は、本発明実施例のランプに用いた多
層干渉膜付き透光性筒の可視領域光の透過特性を示す。
この多層干渉膜は、ランプの光色を電球色に近づけるた
めに、可視領域光の青緑色領域を選択的に反射する特性
を有している。
FIG. 2 shows the transmission characteristics of visible region light of a transparent tube with a multilayer interference film used in the lamp of the embodiment of the present invention.
This multilayer interference film has a property of selectively reflecting the blue-green region of visible region light in order to bring the light color of the lamp closer to the light bulb color.

【0013】次に、本発明実施例のランプ(以下、本発
明ランプという)と透光性筒の両端開口部を閉塞してい
ない点を除いて同一構成を有する従来のランプと下方照
射形の器具を用いて水平点灯させ、器具下方の照射面の
色むらを調べた。その結果、従来ランプでは照射面の端
に反射光の漏れによる青っぽいむらが現れたのに対し、
本発明ランプにおいては照射面の色むらは認められなか
った。
Next, the lamp of the embodiment of the present invention (hereinafter referred to as the lamp of the present invention) and the conventional lamp having the same structure except that the openings at both ends of the translucent tube are not closed are the same as those of the downward irradiation type. The instrument was used to turn on the light horizontally, and the color unevenness of the irradiation surface below the instrument was examined. As a result, in the conventional lamp, bluish unevenness appeared due to leakage of reflected light at the edge of the irradiation surface,
In the lamp of the present invention, no color unevenness was observed on the irradiation surface.

【0014】なお、上記実施例では、反射膜を透光性筒
の外面に形成した場合について説明したが、内面でも、
内外両面でもよい。また、蓋6は金属製のものを用いて
いるが、セラミック等の材質を用いてもよい。
In the above embodiment, the case where the reflective film is formed on the outer surface of the light-transmitting cylinder has been described.
Both inside and outside may be used. Further, although the lid 6 is made of metal, a material such as ceramic may be used.

【0015】[0015]

【発明の効果】以上説明したように、本発明は、電極折
れを生じることがなく、高演色で電球色に近い放射光を
持ったメタルハライドランプにおいて、可視領域反射光
の漏れを防ぎ、ランプの放射光色の方向によるむらを抑
制することのできるメタルハライドランプを提供するこ
とができるものである。
As described above, according to the present invention, in a metal halide lamp which does not cause electrode breakage, has high color rendering and has radiant light close to a light bulb color, leakage of visible light reflected in the visible region is prevented, and It is possible to provide a metal halide lamp capable of suppressing unevenness due to the direction of emitted light color.

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

【図1】本発明の一実施例である100Wのメタルハラ
イドランプの正面図
FIG. 1 is a front view of a 100 W metal halide lamp that is an embodiment of the present invention.

【図2】本発明の一実施例であるメタルハライドランプ
に用いた多層干渉膜付き透光性筒の可視領域光の透過率
特性を示す図
FIG. 2 is a diagram showing a transmittance characteristic of visible region light of a transparent tube with a multilayer interference film used in a metal halide lamp which is an embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1 発光管 2 外管 3 熱反射膜 4 透光性筒 5 多層干渉膜 6 蓋 DESCRIPTION OF SYMBOLS 1 luminous tube 2 outer tube 3 heat reflection film 4 translucent cylinder 5 multilayer interference film 6 lid

───────────────────────────────────────────────────── フロントページの続き (72)発明者 島岡 清新 大阪府高槻市幸町1番1号 松下電子工業 株式会社内 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kiyoshin Shimaoka 1-1, Saiwaicho, Takatsuki-shi, Osaka Matsushita Electronics Industrial Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 内部に一対の電極を有し、かつ金属ハロ
ゲン化物および緩衝ガスが封入された発光管と、前記発
光管を内蔵した外管と、前記外管内において前記発光管
を包囲する少なくとも1つの透光性筒とを備え、前記筒
の表面に可視領域光の一部を反射する反射膜が形成さ
れ、かつ前記筒の両端開口部が蓋によって閉塞されてい
ることを特徴とするメタルハライドランプ。
1. An arc tube having a pair of electrodes inside and containing a metal halide and a buffer gas enclosed therein, an outer tube containing the arc tube, and at least surrounding the arc tube in the outer tube. A metal halide comprising: one translucent tube, a reflective film for reflecting a part of visible region light is formed on a surface of the tube, and both end openings of the tube are closed by a lid. lamp.
JP3131694A 1994-03-01 1994-03-01 Metal halide lamp Pending JPH07245085A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3131694A JPH07245085A (en) 1994-03-01 1994-03-01 Metal halide lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3131694A JPH07245085A (en) 1994-03-01 1994-03-01 Metal halide lamp

Publications (1)

Publication Number Publication Date
JPH07245085A true JPH07245085A (en) 1995-09-19

Family

ID=12327882

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3131694A Pending JPH07245085A (en) 1994-03-01 1994-03-01 Metal halide lamp

Country Status (1)

Country Link
JP (1) JPH07245085A (en)

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