JPS6320138Y2 - - Google Patents
Info
- Publication number
- JPS6320138Y2 JPS6320138Y2 JP12071281U JP12071281U JPS6320138Y2 JP S6320138 Y2 JPS6320138 Y2 JP S6320138Y2 JP 12071281 U JP12071281 U JP 12071281U JP 12071281 U JP12071281 U JP 12071281U JP S6320138 Y2 JPS6320138 Y2 JP S6320138Y2
- Authority
- JP
- Japan
- Prior art keywords
- laser
- cathode
- tube
- laser tube
- protrusion
- 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
- 230000006866 deterioration Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Landscapes
- Lasers (AREA)
Description
【考案の詳細な説明】
本考案は、ガスレーザ管，特に内部ミラー形
He−Neガスレーザ管の外囲器内でレーザ細管先
端部分を包囲する突起（折り返し）の構造に関す
るものである。[Detailed description of the invention] This invention is a gas laser tube, especially an internal mirror type.
This invention relates to the structure of a protrusion (folded) that surrounds the tip of a laser capillary tube within the envelope of a He--Ne gas laser tube.
He−Neガスレーザ管は近年多種多様の用途に
使用されつつある。特にポイント・オブ・セール
ス（POS），ビデオ・レコード・プレーヤ
（VLP）等の光源として大量の需要が期待されて
おり小形でコンパクトなものが必要となつてい
る。このためレーザの活性領域となりレーザプラ
ズマを生成する細管を中心にした同軸形の構造の
ものが採用されている。特に近年は小形で出力の
大きいレーザ管の要求が増大している。レーザ管
の長さ（共振器長）を変えないで出力を上げるた
めには細管径を出来るだけ細くして長くする必要
が有る。しかし単に細管径を細くして長くするだ
けではレーザ放電時にカソードの電流密度が極部
的に増大して、陰極の劣化が早まり短寿命となる
危険性が有る。そこでこれを防ぐためにはレーザ
細管端面からカソードの両端面までの距離を出来
るだけ同一にすることが望ましい。 In recent years, He--Ne gas laser tubes have been used for a wide variety of applications. In particular, a large amount of demand is expected as a light source for point-of-sales (POS), video record players (VLP), etc., and there is a need for small and compact devices. For this reason, a coaxial structure centered on a thin tube that becomes the active region of the laser and generates laser plasma is used. Particularly in recent years, there has been an increasing demand for small-sized laser tubes with high output. In order to increase the output without changing the length of the laser tube (resonator length), it is necessary to make the tube diameter as thin as possible and make it longer. However, if the tube diameter is simply made narrower and longer, there is a risk that the current density of the cathode will increase locally during laser discharge, leading to faster deterioration of the cathode and shortening its lifespan. Therefore, in order to prevent this, it is desirable to make the distance from the end face of the laser tube to both end faces of the cathode as equal as possible.
従来は第１図に示すように外囲器１内のレーザ
細管２の先端部８をレーザ細管２と同軸の突起
（折り返し）７で包囲しアノード４とカソード５
間に高電圧を印加させて外囲器１内でレーザ放電
をさせ第１図のレーザ管両端に具備された一対の
ミラー３および６とレーザ細管２で光共振器を構
成してレーザ光９が発振するときカソードの電流
密度が平滑化されるような構造を持たせていた。
しかし、逆にこの突起（折り返し）７の影響でア
ノード４とカソード５間のインピータンスが増加
して放電が不安定となつたり放電推持電流が上昇
する等の不都合が有つた。 Conventionally, as shown in FIG. 1, the tip 8 of the laser tube 2 in the envelope 1 is surrounded by a protrusion (folded) 7 coaxial with the laser tube 2, and the anode 4 and cathode 5 are connected to each other.
A high voltage is applied between them to generate a laser discharge within the envelope 1, and an optical resonator is constructed with the pair of mirrors 3 and 6 provided at both ends of the laser tube in FIG. The structure was such that the current density at the cathode was smoothed when the current density oscillated.
However, conversely, the impedance between the anode 4 and the cathode 5 increases due to the influence of this protrusion (folding) 7, resulting in disadvantages such as unstable discharge and an increase in discharge sustaining current.
本考案は、第２図に示すように突起（折り返
し）７にテーパーを持たせることによりこれらの
欠点を解消し小形軽量で高出力のHe−Neガスレ
ーザ管を提供するものである。 The present invention eliminates these drawbacks by providing a taper to the protrusion (folded) 7 as shown in FIG. 2, thereby providing a small, lightweight, and high-output He--Ne gas laser tube.
本考案のとおり突起（折り返し）７をテーパー
状にすればアノード４とカソード５間のインピー
タンスが低下してレーザ放電が安定し放電推持電
流が低下するばかりでなくレーザ放電時のカソー
ドの電流密度も平滑化することが出来るため長寿
命の高信頼性レーザ管を簡単に作ることが出来
る。 If the protrusion (folded) 7 is tapered as in the present invention, the impedance between the anode 4 and the cathode 5 will be reduced, stabilizing the laser discharge, and not only reducing the discharge sustaining current but also reducing the cathode current during laser discharge. Since the density can also be smoothed, a long-life, highly reliable laser tube can be easily produced.
第１図は従来のレーザ管の断面、第２図は本考
案の一実施例の断面図を示す。
１，１′……外囲器、２，２′，８，８′……レ
ーザ細管、３，３′……出力側ミラー、４，４′…
…アノード、５，５′……カソード、６，６′……
全反射側ミラー、７，７′……突起（折り返し）。
FIG. 1 shows a cross section of a conventional laser tube, and FIG. 2 shows a cross section of an embodiment of the present invention. 1, 1'... Envelope, 2, 2', 8, 8'... Laser tube, 3, 3'... Output side mirror, 4, 4'...
...Anode, 5,5'...Cathode, 6,6'...
Total reflection side mirror, 7, 7'...Protrusion (folded).
Claims (1)
部を包囲する同軸状の突起（折り返し）をテーパ
状にしたことを特徴とするガスレーザ管。 An internal mirror type gas laser tube characterized in that a coaxial protrusion (folded back) surrounding a thin tube tip is tapered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12071281U JPS5827958U (en) | 1981-08-14 | 1981-08-14 | gas laser tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12071281U JPS5827958U (en) | 1981-08-14 | 1981-08-14 | gas laser tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5827958U JPS5827958U (en) | 1983-02-23 |
| JPS6320138Y2 true JPS6320138Y2 (en) | 1988-06-03 |
Family
ID=29914694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12071281U Granted JPS5827958U (en) | 1981-08-14 | 1981-08-14 | gas laser tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5827958U (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60164864U (en) * | 1984-04-13 | 1985-11-01 | ダイワ精工株式会社 | fish basket |
| JPH02126537U (en) * | 1989-03-30 | 1990-10-18 |
-
1981
- 1981-08-14 JP JP12071281U patent/JPS5827958U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5827958U (en) | 1983-02-23 |
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