JP3147303B2 - Gas discharge tube - Google Patents
Gas discharge tubeInfo
- Publication number
- JP3147303B2 JP3147303B2 JP22591890A JP22591890A JP3147303B2 JP 3147303 B2 JP3147303 B2 JP 3147303B2 JP 22591890 A JP22591890 A JP 22591890A JP 22591890 A JP22591890 A JP 22591890A JP 3147303 B2 JP3147303 B2 JP 3147303B2
- Authority
- JP
- Japan
- Prior art keywords
- electron
- barrier plate
- cathode
- optical axis
- discharge 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.)
- Expired - Lifetime
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- Gas-Filled Discharge Tubes (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Description
【発明の詳細な説明】 「産業上の利用分野」 本発明は分析、定量測定などに使用される重水素ラン
プなどのガス放電管に関するものである。Description: TECHNICAL FIELD The present invention relates to a gas discharge tube such as a deuterium lamp used for analysis, quantitative measurement, and the like.
「従来の技術」 従来のガス放電管、例えば重水素ランプは、第７図お
よび第８図に示すように、透明なガラス製の密閉容器
（１）内の光軸（２）上に陽極（３）が配置され、この
陽極（３）はその外周が遮蔽電極（４）で包囲されてい
る。また、陽極（３）の前方には、円錐筒状に絞られた
電子収束部（５）が設けられ、この電子収束部（５）の
陽極側には最小径0.4〜2.0mmφの小孔（６）が穿設され
ている。この電子収束部（５）の前方には光透過孔
（７）が開口され、また側方には陰極（８）が設けられ
ている。この陰極（８）は３方が遮蔽電極（４）で包囲
されているが、陽極（３）への電子が通過する電子路
（９）の部分だけを開口するようにして障壁板（10）が
設けられている。2. Description of the Related Art As shown in FIGS. 7 and 8, a conventional gas discharge tube, such as a deuterium lamp, has an anode (2) in a transparent glass sealed container (1) on an optical axis (2). The anode (3) is surrounded by a shielding electrode (4). In front of the anode (3), an electron converging portion (5) narrowed in a conical cylindrical shape is provided, and a small hole having a minimum diameter of 0.4 to 2.0 mmφ is provided on the anode side of the electron converging portion (5). 6) is drilled. A light transmitting hole (7) is opened in front of the electron converging portion (5), and a cathode (8) is provided on the side. The cathode (8) is surrounded on three sides by a shielding electrode (4), but only a part of an electron path (9) through which electrons to the anode (3) pass is opened to form a barrier plate (10). Is provided.
このような重水素ランプ（12）は、透明ガラス製密閉
容器（１）内に数Torrの重水素ガスを封入し、陰極
（８）を予熱した後、陽極（３）と陰極（８）間にトリ
ガ電極を印加してアーク放電を開始し、放電後は主電源
電圧を印加して放電を継続するようになっている。ここ
で、このアーク放電時に陰極（８）からスパッタ物が発
生するので、前記障壁板（10）は陰極（８）から発生す
るスパッタ物が前記電子収束部（５）やガラス容器
（１）の発光部（13）へ付着するのを防止する。そし
て、反射効率の低下と光透過率の低下を防止しようとし
ているものである。In such a deuterium lamp (12), several Torr of deuterium gas is sealed in a transparent glass sealed container (1), and after preheating the cathode (8), a space between the anode (3) and the cathode (8) is formed. , A trigger electrode is applied to start arc discharge, and after the discharge, the main power supply voltage is applied to continue the discharge. Here, since spatters are generated from the cathode (8) during the arc discharge, the barrier plate (10) is formed by the spatters generated from the cathode (8) on the electron converging portion (5) and the glass container (1). Prevents adhesion to the light emitting part (13). Then, it is intended to prevent a decrease in reflection efficiency and a decrease in light transmittance.
「発明が解決しようとする課題」 前述のように障壁板（10）はスパッタ物の飛散防止の
作用をする。ところが、その取付け位置によっては輝度
の増加の良否に重大な影響を及ぼすことが判明した。す
なわち、ガス放電管は放電によって電子収束部（５）に
電子が絞り込まれることで、電子密度が高くなり、その
結果、封入ガスとの衝突確立が高くなり、衝突による発
光強度が増加する。しかるに、陰極（８）から陽極
（３）に至る電子路（９）は、可能な限り最短距離をと
るので障壁至（10）の先端部（14）の付近から電子収束
部（５）の陰極側上面（15）の付近を通る。この結果、
従来のガス放電管では、電子収束により生ずる高密度電
子領域（16）が、第７図の斜線で示すように、電子収束
部（５）の上部では光軸（２）よりも陰極（８）側へ偏
よることとなって、高密度電子領域（16）が広がりをみ
せる。このことが点光源であるべきガス放電管の輝度増
加の妨げとなっていた。"Problem to be Solved by the Invention" As described above, the barrier plate (10) functions to prevent scattering of spatter. However, it has been found that depending on the mounting position, the quality of the increase in luminance is significantly affected. That is, in the gas discharge tube, the electrons are narrowed down to the electron converging portion (5) by the discharge, so that the electron density is increased. As a result, the probability of collision with the sealed gas is increased, and the light emission intensity due to the collision is increased. However, since the electron path (9) from the cathode (8) to the anode (3) is as short as possible, the distance from the tip (14) of the barrier (10) to the cathode of the electron converging section (5) is reduced. Pass near the upper side (15). As a result,
In the conventional gas discharge tube, the high-density electron region (16) generated by the electron convergence has the cathode (8) rather than the optical axis (2) above the electron convergence part (5) as shown by the oblique lines in FIG. As a result, the high-density electron region (16) expands. This has hindered an increase in luminance of the gas discharge tube which should be a point light source.
本発明は障壁板の位置、形状を適切に設定することで
輝度の向上を図ったガス放電管を得ることを目的とす
る。An object of the present invention is to obtain a gas discharge tube in which luminance is improved by appropriately setting the position and shape of a barrier plate.
「課題を解決するための手段」 本発明は、ガスを封入した密閉容器内に、陽極、陰
極、陽極前面の電子収束部、陰極前面の障壁板を具備
し、前記陰極から発射された電子流を前記電子収束部で
収束して封入したガスの分子に衝突させることによりガ
スの分子を発光させ、この光を所定の光軸方向に放射す
るガス放電管において、前記障壁板の先端部を、放射さ
れる前記光を遮らない範囲で前記光軸に隣接させること
により、前記電子収束部における電子流が光軸に沿って
前記電子収束部へ入射するように誘導してなることを特
徴とする。[Means for Solving the Problems] The present invention comprises an anode, a cathode, an electron converging section on the front surface of the anode, and a barrier plate on the front surface of the cathode in a sealed container filled with gas, and an electron flow emitted from the cathode. In the gas discharge tube that emits gas molecules in a predetermined optical axis direction by causing gas molecules to emit light by colliding with the gas molecules enclosed and condensed by the electron converging portion, the tip of the barrier plate is By causing the emitted light to be adjacent to the optical axis within a range that does not block the emitted light, the electron flow in the electron converging section is guided so as to enter the electron converging section along the optical axis. .
「作用」 陰極から発射した電子流は障壁板の先端部を経て電子
収束部で絞り込まれ陽極へ至る。このとき、障壁板はそ
の先端部をできるだけ電子収束部に近づけて設け、電子
流が電子収束部では直線的に入射するようにした。する
と、電子収束部に生ずる高密度電子領域が光軸に沿って
生成され、したがって、点光源の輝度が増加する。[Operation] The electron flow emitted from the cathode is narrowed down at the electron converging section through the tip of the barrier plate and reaches the anode. At this time, the tip end of the barrier plate was provided as close to the electron converging portion as possible, so that the electron flow was linearly incident on the electron converging portion. Then, a high-density electron region generated in the electron converging portion is generated along the optical axis, and therefore, the brightness of the point light source increases.
「実施例」 以下、本発明の実施例を図面に基づき説明する。Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
本発明の第１実施例を第１図により説明すると、障壁
板（４）以外の形状は従来例を示した第７図および第８
図と変るところがないので、同一部分には同一符号を付
した。A first embodiment of the present invention will be described with reference to FIG. 1. FIGS. 7 and 8 show a conventional example except for a barrier plate (4).
Since there is no difference from the drawing, the same portions are denoted by the same reference numerals.
本発明の第１実施例における障壁板（10）は、その先
端部（14）が、できるだけ電子収束部（５）に近づけて
設けられる。すなわち、障壁板（10）の基部（17）は従
来同様、電子収束部（５）から離れているが、先端部
（14）が電子収束部（５）に近づけられる。例えば、陰
極（８）の中心を通り、光軸（２）と直交する直交線
（18）と、電子収束部（５）の上面端（15）付近を通
り、光軸（２）と平行な平行線（19）との交点（20）近
くまで伸びるように設ける。また、この障壁板（10）の
長さ（ｌ）は第３図に示すように、陰極（８）の電子放
射部分より長くする。この障壁板（10）は第３図のよう
に直線的な板状をなすものであってもよいが、第４図に
示すように、電子収束部（５）を中心として湾曲したも
のとしてもよい。さらに、第５図に示すように、電子収
束部（５）の全外周を包囲するような円筒状をなすもの
であってもよい。The barrier plate (10) in the first embodiment of the present invention is provided with its tip (14) as close as possible to the electron converging section (5). That is, the base portion (17) of the barrier plate (10) is separated from the electron converging portion (5) as in the related art, but the tip portion (14) is closer to the electron converging portion (5). For example, an orthogonal line (18) passing through the center of the cathode (8) and orthogonal to the optical axis (2) and passing near the upper end (15) of the electron converging portion (5) and being parallel to the optical axis (2). It is provided to extend near the intersection (20) with the parallel line (19). Further, as shown in FIG. 3, the length (l) of the barrier plate (10) is made longer than the electron emitting portion of the cathode (8). The barrier plate (10) may have a linear plate shape as shown in FIG. 3, but may have a curved shape around the electron converging portion (5) as shown in FIG. Good. Further, as shown in FIG. 5, a cylindrical shape surrounding the entire outer periphery of the electron converging portion (5) may be used.
以上のような構成とすることにより、陰極（８）から
陽極（３）へ至る電子路（９）は第１図の点線のように
障壁板（10）の先端部（14）の付近を通ることとなっ
て、電子収束部（５）における電子流は光軸（２）に近
づき、直線的に入射することとなる。このため、高密度
電子領域（16）は、陰極（８）側へ広がることなく、光
軸（２）に向った電子収束部（16）上に生成され、輝度
が向上する。With the above configuration, the electron path (9) from the cathode (8) to the anode (3) passes near the tip (14) of the barrier plate (10) as shown by the dotted line in FIG. In other words, the electron flow in the electron converging section (5) approaches the optical axis (2) and enters linearly. Therefore, the high-density electron region (16) is generated on the electron converging portion (16) facing the optical axis (2) without expanding toward the cathode (8), and the luminance is improved.
つぎに、第２図は本発明の他の実施例を示すもので、
この例では、障壁板（10）の基部（17）が電子収束部
（５）の上面端（15）に近い略前記平行線（19）上に位
置し、また、先端部（14）が前記直交線（18）と平行線
（19）との交点（20）よりやや陰極（８）側に傾いて設
けられる。なお、この障壁板（10）の先端部（14）の位
置は陰極（８）側にやや傾くことなく、鎖線で記載した
もの（10a）のように、平行線（19）の沿って直立する
ように設けてもよい。以上の第２図の障壁板（10）（10
a）の長さ（ｌ）方向の形状は、前記同様第３図のよう
に直線的なもの、第４図のように湾曲したもの、第５図
のように円筒状としたものとすることができる。Next, FIG. 2 shows another embodiment of the present invention.
In this example, the base (17) of the barrier plate (10) is located on the substantially parallel line (19) near the upper end (15) of the electron converging section (5), and the tip (14) is It is provided slightly inclined to the cathode (8) side from the intersection (20) of the orthogonal line (18) and the parallel line (19). The position of the tip (14) of the barrier plate (10) does not slightly incline toward the cathode (8), but stands upright along the parallel line (19) as shown by the chain line (10a). It may be provided as follows. The barrier plate (10) (10
a) The shape in the length (l) direction should be linear as shown in FIG. 3, curved as shown in FIG. 4, and cylindrical as shown in FIG. Can be.
以上第２図のような構成とすることにより、高密度電
子領域（16）は光軸（２）に沿って生成され、輝度が向
上する。With the configuration as shown in FIG. 2, the high-density electron region (16) is generated along the optical axis (2), and the luminance is improved.
前記第１図および第２図の実施例では、陰極（８）の
位置が、電子収束部（５）の側方に配置された例を示し
たが、第６図に示すように、陰極（８）を電子収束部
（５）の下方（または上方）に配置してもよい。このと
き、陰極（８）と電子収束部（５）との間に、前記同様
光軸（２）に沿って高密度電子領域（（16）となるよう
な障壁板（10）が取付けられことは勿論である。In the embodiment shown in FIGS. 1 and 2, the position of the cathode (8) is arranged on the side of the electron converging portion (5). However, as shown in FIG. 8) may be arranged below (or above) the electron converging section (5). At this time, a barrier plate (10) is provided between the cathode (8) and the electron converging portion (5) so as to form a high-density electron region ((16)) along the optical axis (2) as described above. Of course.
第１図および第２図において、鎖線で示したものは従
来の障壁板である。これらの障壁板が取付けられたま
ま、本発明の障壁板（10）が設けられてもよい。本発明
の障壁板（10）の作用により従来の障壁板の作用はほと
んどなくなるが構造的強度を維持できるからである。In FIGS. 1 and 2, what is indicated by a chain line is a conventional barrier plate. The barrier plate (10) of the present invention may be provided with these barrier plates attached. This is because the function of the barrier plate (10) of the present invention almost eliminates the function of the conventional barrier plate, but can maintain the structural strength.
「発明の効果」 本発明は上述のように、陰極から陽極への電子流が電
子収束部にて光軸に沿って略直線的に入射するようにし
たので、高密度電子領域が光軸に沿って生成する。した
がって、点光源としてのガス放電管の輝度が向上する。[Effects of the Invention] As described above, the present invention allows the electron flow from the cathode to the anode to be incident substantially linearly along the optical axis at the electron converging portion, so that the high-density electron region is located at the optical axis. Generate along. Therefore, the brightness of the gas discharge tube as a point light source is improved.
ちなみに、従来の障壁板と本発明の障壁板との光出力
を比較した特性曲線を第９図に示す。この場合の電子収
束部（５）の小孔（６）を直径1mm、放電電流を0.3A、
管電圧を75±5Vとし、かつ電気的電子収束形状が同一条
件となるようにして測定した。この結果、特性線（Ｄ）
は第７図および第８図に示した従来のガス放電管の場合
を示し、その他の特性線（Ａ）（Ｂ）（Ｃ）はいずれも
本発明による特性線である。このうち、（Ａ）は第２図
に示した障壁板（10）であって、かつ第５図のように障
壁板（10）が電子収束部（５）の全外周を包囲したもの
である場合である。（Ｂ）は第１図に示した障壁板（1
0）であって、かつ第３図のように障壁板（10）が直線
的である場合である。さらに、（Ｃ）は第２図に示した
障壁板（10）であって、第４図のように障壁板（10）が
弧状に包囲した場合である。これらの特性図から、特性
線（Ａ）（Ｂ）（Ｃ）は従来の特性線（Ｄ）に比し、少
なくとも20％以上の光量増が得られることがわかる。Incidentally, FIG. 9 shows a characteristic curve comparing the optical output of the conventional barrier plate and that of the barrier plate of the present invention. In this case, the small hole (6) of the electron converging portion (5) has a diameter of 1 mm, the discharge current is 0.3 A,
The measurement was performed with the tube voltage set to 75 ± 5 V and the electric electron convergence shape under the same conditions. As a result, the characteristic line (D)
Shows the case of the conventional gas discharge tube shown in FIGS. 7 and 8, and the other characteristic lines (A), (B) and (C) are characteristic lines according to the present invention. Among them, (A) is the barrier plate (10) shown in FIG. 2, and as shown in FIG. 5, the barrier plate (10) surrounds the entire outer periphery of the electron converging portion (5). Is the case. (B) shows the barrier plate (1) shown in FIG.
0) and the barrier plate (10) is linear as shown in FIG. FIG. 2C shows the barrier plate (10) shown in FIG. 2, in which the barrier plate (10) is surrounded by an arc as shown in FIG. From these characteristic diagrams, it can be seen that the characteristic lines (A), (B), and (C) can provide at least a 20% increase in the amount of light compared to the conventional characteristic line (D).
第１図は本発明によるガス放電管の第１実施例を示す横
断面図、第２図は本発明の他の実施例を示す横断面図、
第３図は第１図の縦断面図、第４図は本発明の障壁板の
他の実施例の縦断面図、第５図は本発明の障壁板のさら
に他の実施例の縦断面図、第６図は本発明の陰極の他の
実施例の縦断面図、第７図は従来のガス放電管の横断面
図、第８図は第７図の縦断面図、第９図は特性曲線図で
ある。 （１）……密閉容器、（２）……光軸、（３）……陽
極、（４）……遮蔽電極、（５）……電子収束部、
（６）……小孔、（７）……光透過孔、（８）……陰
極、（９）……電子路、（10）……障壁板、（12）……
重水素ランプ、（13）……発光部、（14）……先端部、
（14）……先端部、（15）……陰極側上面、（16）……
高密度電子領域、（17）……基部、（18）……直交線、
（19）……平行線、（20）……交点。FIG. 1 is a cross sectional view showing a first embodiment of a gas discharge tube according to the present invention, FIG. 2 is a cross sectional view showing another embodiment of the present invention,
3 is a longitudinal sectional view of FIG. 1, FIG. 4 is a longitudinal sectional view of another embodiment of the barrier plate of the present invention, and FIG. 5 is a longitudinal sectional view of still another embodiment of the barrier plate of the present invention. 6 is a longitudinal sectional view of another embodiment of the cathode of the present invention, FIG. 7 is a transverse sectional view of a conventional gas discharge tube, FIG. 8 is a longitudinal sectional view of FIG. 7, and FIG. It is a curve figure. (1) ... airtight container, (2) ... optical axis, (3) ... anode, (4) ... shielding electrode, (5) ... electron focusing section,
(6) ... small hole, (7) ... light transmission hole, (8) ... cathode, (9) ... electron path, (10) ... barrier plate, (12) ...
Deuterium lamp, (13)… Light-emitting part, (14)… Tip,
(14)… tip, (15)… top surface on the cathode side, (16)…
High-density electronic region, (17) base, (18) orthogonal line,
(19) ... parallel line, (20) ... intersection.
Claims (1)
極、陽極前面の電子収束部、陰極前面の障壁板を具備
し、前記陰極から発射された電子流を前記電子収束部で
収束して封入したガスの分子に衝突させることによりガ
スの分子を発光させ、この光を所定の光軸方向に放射す
るガス放電管において、 前記障壁板の先端部を、放射される前記光を遮らない範
囲で前記光軸に隣接させることにより、前記電子収束部
における電子流が光軸に沿って前記電子収束部へ入射す
るように誘導してなることを特徴とするガス放電管。An airtight container enclosing a gas is provided with an anode, a cathode, an electron converging portion on the front surface of the anode, and a barrier plate on the front surface of the cathode. In a gas discharge tube that emits light in a predetermined optical axis direction by colliding with gas molecules enclosed in the gas discharge tube and emits this light in a predetermined optical axis direction, the tip of the barrier plate does not block the emitted light. A gas discharge tube wherein the electron flow in the electron converging section is guided along the optical axis to enter the electron converging section by being adjacent to the optical axis in a range.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22591890A JP3147303B2 (en) | 1990-08-27 | 1990-08-27 | Gas discharge tube |
| US07/749,367 US5191260A (en) | 1990-08-27 | 1991-08-23 | Gas discharge tube providing improved flow line of electrons |
| EP91307785A EP0473378B1 (en) | 1990-08-27 | 1991-08-23 | Gas discharge tube |
| DE69111158T DE69111158T2 (en) | 1990-08-27 | 1991-08-23 | Gas discharge tube. |
| AT91307785T ATE125064T1 (en) | 1990-08-27 | 1991-08-23 | GAS DISCHARGE TUBE. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22591890A JP3147303B2 (en) | 1990-08-27 | 1990-08-27 | Gas discharge tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04106859A JPH04106859A (en) | 1992-04-08 |
| JP3147303B2 true JP3147303B2 (en) | 2001-03-19 |
Family
ID=16836928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22591890A Expired - Lifetime JP3147303B2 (en) | 1990-08-27 | 1990-08-27 | Gas discharge tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3147303B2 (en) |
-
1990
- 1990-08-27 JP JP22591890A patent/JP3147303B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04106859A (en) | 1992-04-08 |
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