JPS59180937A - Structure body of electron gun for camera tube of electrostatic focusing type - Google Patents
Structure body of electron gun for camera tube of electrostatic focusing typeInfo
- Publication number
- JPS59180937A JPS59180937A JP5256983A JP5256983A JPS59180937A JP S59180937 A JPS59180937 A JP S59180937A JP 5256983 A JP5256983 A JP 5256983A JP 5256983 A JP5256983 A JP 5256983A JP S59180937 A JPS59180937 A JP S59180937A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- cylinder
- cylinder electrode
- slits
- electron gun
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/48—Electron guns
- H01J29/485—Construction of the gun or of parts thereof
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は複数のシリンダ電極を用いてその電位配分を変
えることζこより電子ビームを集束させる作用をもたせ
る静電集束形撮像管用電子銃構体に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an electron gun assembly for an electrostatic focusing image pickup tube, which has the effect of focusing an electron beam by changing the potential distribution using a plurality of cylinder electrodes.
第１図は従来の静電集束形撮像管用電子銃構体を示す。 FIG. 1 shows a conventional electron gun assembly for an electrostatic focusing type image pickup tube.
静電集束用レンズの球面収差特性はレンズの口径に依存
して大口径の方が有利となる。そこで、限られた径で最
大限の口径となるように、Ｇ、シリンダ電極１、Ｇ４シ
リンダ電極２、Ｇ、シリンダ電極３はその端面が対向す
るように配置し、ビードガラス４で一体に固定してシリ
ンダ組立５としている。The spherical aberration characteristics of the electrostatic focusing lens depend on the aperture of the lens, and larger apertures are more advantageous. Therefore, in order to maximize the diameter with a limited diameter, G cylinder electrode 1, G4 cylinder electrode 2, G cylinder electrode 3 are arranged so that their end surfaces face each other, and they are fixed together with bead glass 4. This is referred to as cylinder assembly 5.
一方、工程の都合上、ビーム放出および制御部となる下
部電極６とシリンダ組立５は、下部電極６の０３’Ｊン
グ電極７をシリンダ組立５の０３シリンダ電極１に嵌合
させ、嵌合部をスポット溶接で固定している。On the other hand, due to process reasons, the lower electrode 6 and the cylinder assembly 5, which serve as the beam emission and control section, are constructed by fitting the 03'J ring electrode 7 of the lower electrode 6 to the 03 cylinder electrode 1 of the cylinder assembly 5, and the fitting part are fixed by spot welding.
このようにＧ３’Ｊング電極７をＧ３シリンダ電極１に
嵌合させるので、Ｑ３１Ｊング電極７の内径と０３シリ
ンダ電極１の外径との間（こは、加工上必ずギャップが
存在する。このギャップのため、溶接により両者、特ζ
こＧ３シリンダ電極１の真円度が低下する。ところで、
集束される電子ビームはシリンダ電極の対称性ζこ影響
されるので、前記のよう（こＧ３シリンダ電極１の真円
度が低下すると、その影響が０３シリンダ電極１の０４
シリンダ電極２側の端面１ａまで波及し、集束される電
子ビームが真円とならず非点となる。Since the G3'J ring electrode 7 is fitted to the G3 cylinder electrode 1 in this way, there is always a gap between the inner diameter of the Q31 J ring electrode 7 and the outer diameter of the 03 cylinder electrode 1 due to machining. Because of the gap, both parts are welded, and the special ζ
This reduces the roundness of the G3 cylinder electrode 1. by the way,
Since the focused electron beam is affected by the symmetry of the cylinder electrode, as described above (if the roundness of the G3 cylinder electrode 1 decreases, the effect will be on the 04 of the 03 cylinder electrode 1.
The electron beam spreads to the end surface 1a on the cylinder electrode 2 side, and the focused electron beam does not become a perfect circle but becomes an astigmatism.
本発明の目的はシリンダ電極の非点収差を防止すること
ができる静電集束形撮像管用電子銃構体を提供すること
（こある。SUMMARY OF THE INVENTION An object of the present invention is to provide an electron gun assembly for an electrostatic focusing image pickup tube that can prevent astigmatism of a cylinder electrode.
本発明はリング電極の嵌合部端面に複数個のスリットを
設けたことを特徴とする。The present invention is characterized in that a plurality of slits are provided on the end face of the fitting portion of the ring electrode.
以下、本発明の一実施例を第２図（こより説明する。な
お、第１図と同じ部材または相当部材には同一符号を付
し、その説明を省略する。Ｇ３シリンダ電極１に嵌合す
るＧ３１Ｊング電極７の嵌合部端面にあらかじめ複数個
のスリブｌ−７２を設けておく。このスリット７ａは、
例えば３点溶接固定の場合は３ケ所設ける。そして、Ｇ
３リング電極７をＧ３シリンダ電極１に嵌合させ、スリ
ット７３間の部分をＸ印で示す位置でスポット溶接する
。An embodiment of the present invention will be described below with reference to FIG. 2. The same or equivalent members as in FIG. A plurality of slits 1-72 are provided in advance on the end surface of the fitting part of the G31J ring electrode 7.The slits 7a are
For example, in the case of 3-point welding, provide 3 locations. And G
The 3-ring electrode 7 is fitted into the G3 cylinder electrode 1, and the portion between the slits 73 is spot welded at the position indicated by the X mark.
このように、Ｇ３リング電極７にはスリット７ａを設け
てなるので、溶接時にはＧ３リング電極７の嵌合部端面
のみが変形してＧ３シリンダ電極１に固定され、Ｇ３シ
リンダ電極１は変形を起さない。従つて、Ｇ３シリンダ
電極１の０４シリンダ電極２側の端面１ａも変形しなく
、非点収差が改善される。In this way, since the G3 ring electrode 7 is provided with the slit 7a, only the end face of the fitting part of the G3 ring electrode 7 is deformed and fixed to the G3 cylinder electrode 1 during welding, and the G3 cylinder electrode 1 is deformed. I don't. Therefore, the end surface 1a of the G3 cylinder electrode 1 on the 04 cylinder electrode 2 side is not deformed, and astigmatism is improved.
以上の説明から明らかな如く、本発明によれは、シリン
ダ電極が変形しないので、シリンダ電極の非点収差が向
上する。As is clear from the above description, according to the present invention, since the cylinder electrode is not deformed, the astigmatism of the cylinder electrode is improved.
第１図は従来例の断面図、第２図は本発明の一実施例を
示す要部正面図である。
■・・・Ｇ３シリンダ電極、 ７・・・Ｇ３リング
電極、７ａ・・・スリット。
代理人 弁理士 高 橋 明 岑′・−１・２、ｌ５１
１．）
゛・−Ｉ−′FIG. 1 is a sectional view of a conventional example, and FIG. 2 is a front view of essential parts showing an embodiment of the present invention. ■...G3 cylinder electrode, 7...G3 ring electrode, 7a...slit. Agent Patent Attorney Akira Takahashi 岑′・-1・2, l51
1. ) ゛・−I−′
Claims (1)
接固定してなる静電集束形撮像管用電子銃構体（こおい
て、前記リング電極の嵌合部端面に複数個のスリットを
設けて前記シリンダ電極（こ固定してなる静電集束形撮
像管用電子銃構体。An electron gun assembly for an electrostatic focusing image pickup tube, which is formed by fitting a ring electrode to a cylinder electrode and fixing the fitting part by welding (here, a plurality of slits are provided on the end surface of the fitting part of the ring electrode). An electron gun assembly for an electrostatic focusing image pickup tube, which is formed by fixing the cylinder electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5256983A JPS59180937A (en) | 1983-03-30 | 1983-03-30 | Structure body of electron gun for camera tube of electrostatic focusing type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5256983A JPS59180937A (en) | 1983-03-30 | 1983-03-30 | Structure body of electron gun for camera tube of electrostatic focusing type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59180937A true JPS59180937A (en) | 1984-10-15 |
Family
ID=12918433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5256983A Pending JPS59180937A (en) | 1983-03-30 | 1983-03-30 | Structure body of electron gun for camera tube of electrostatic focusing type |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59180937A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0635863A1 (en) * | 1993-07-19 | 1995-01-25 | Sony Corporation | Electron gun for a cathode ray tube |
-
1983
- 1983-03-30 JP JP5256983A patent/JPS59180937A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0635863A1 (en) * | 1993-07-19 | 1995-01-25 | Sony Corporation | Electron gun for a cathode ray tube |
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