JPS6041414B2 - Focus lens manufacturing method - Google Patents
Focus lens manufacturing methodInfo
- Publication number
- JPS6041414B2 JPS6041414B2 JP14056876A JP14056876A JPS6041414B2 JP S6041414 B2 JPS6041414 B2 JP S6041414B2 JP 14056876 A JP14056876 A JP 14056876A JP 14056876 A JP14056876 A JP 14056876A JP S6041414 B2 JPS6041414 B2 JP S6041414B2
- Authority
- JP
- Japan
- Prior art keywords
- focus lens
- manufacturing
- cylindrical electrode
- electrodes
- cylindrical
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 238000000034 method Methods 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 description 6
- 238000003466 welding Methods 0.000 description 4
- 238000010894 electron beam technology Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Landscapes
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
Description
【発明の詳細な説明】
本発明は映像管あるし、は撮像管に用いられる電子銃の
フオーカスレンズに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a focus lens for an electron gun used in a picture tube or image pickup tube.
映像管あるし、は撮像管に用いられる電子銃のフオーカ
スレンズは２個もしくは３個の同径の円筒電極が互いに
間隔を置いて直列に配設されて成り、２個の円筒電極よ
り成るバィポテンシャル型と呼ばれるものと、３個の円
筒電極より成るュニポテンシャル型と呼ばれるものとが
ある。ところで、前記各円筒電極の軸が同軸でない場合
は、フオーカスレンズ中の電界の対称性がくずれ電子ビ
ームを歪ませるので、フオーカスされた電子ビームは前
記各円筒電極が同軸状にあるフオーカスレンズでフオー
カスされた場合のように電子ビームを小さく絞れなくな
る。つまり、電子銃のフオーカスレンズにおいては各円
筒電極の軸芯が一致していることが必要とされるのであ
る。そこで、従来から各円筒電極の鞄芯の一致したフオ
ーカスレンズを得べく種々のフオーカスレンズの製造方
法が提案されているが、その一例として以下、ュニポテ
ンシャル型のフオーカスレンズの製造方法を第１図に基
づいて説明する。The focus lens of an electron gun used in a picture tube or image pickup tube consists of two or three cylindrical electrodes of the same diameter arranged in series at a distance from each other. There are two types: one is called a bipotential type, and the other is called a unipotential type, which consists of three cylindrical electrodes. By the way, if the axes of the cylindrical electrodes are not coaxial, the symmetry of the electric field in the focus lens will be broken and the electron beam will be distorted. The electron beam cannot be narrowed down as much as it would be if the beam was focused. In other words, in the focus lens of an electron gun, the axes of each cylindrical electrode must be aligned. Therefore, various methods for manufacturing a focus lens have been proposed in the past in order to obtain a focus lens in which the cores of each cylindrical electrode coincide. will be explained based on FIG.
先づ、３個の円筒電極１，２，３をスベンサー４を介し
て直列に配置し、前記各電極１，２，３が同軸になるよ
うに治具５を用いて固定する。次いで前記各電極１，２
，３をセラミックロッド６を介してバンド７をスポット
溶接で固定するか或はビーディングガラスで固定する。
この場合、同軸を出す拾具には電極を出し入れするため
のクリアランスが必要であり、また電極の内径にも公差
があるため、治具５を使用して製造した場合でも前記各
電極１，２，３が同軸になっているとは限らず、フオー
カスレンズの特性にバラッキが生じ、フオーカスされた
電子ビームを絞れなくなるという欠点を有していた。本
発明は上記の欠点を解消すべく成されたものであり、各
電極の軸ずれがなく特性のバラッキのないフオーカスレ
ンズの製造方法を提供せんとするものである。First, three cylindrical electrodes 1, 2, and 3 are arranged in series via a spacer 4, and fixed using a jig 5 so that the electrodes 1, 2, and 3 are coaxial. Next, each of the electrodes 1 and 2
, 3 are fixed to the band 7 via the ceramic rod 6 by spot welding or by beading glass.
In this case, the pick-up tool that takes out the coax requires clearance to take the electrodes in and out, and there is also a tolerance in the inner diameter of the electrodes, so even if the jig 5 is used to manufacture each of the electrodes 1 and 2, , 3 are not necessarily coaxial, and the characteristics of the focus lens vary, resulting in the disadvantage that the focused electron beam cannot be narrowed down. The present invention has been made in order to eliminate the above-mentioned drawbacks, and it is an object of the present invention to provide a method for manufacturing a focus lens in which there is no axis deviation of each electrode and there is no variation in characteristics.
以下、本発明の一実施例を第２図に基づいて説明する。Hereinafter, one embodiment of the present invention will be described based on FIG. 2.
図において、１１は精度よくプレス成型された中空の円
筒電極、１２は該円筒電極の外側に複数個のバンド１３
をスポット溶接する事により固定されたセラミックロッ
ドである。ところで、フオーカスレンズの製造に際して
は、先づ、精度よくプレス成型された中空の円筒電極１
１の外側に該円筒電極１１の軸に添い、かつ管軸に対称
に複数個のセラミックロッド１２がバンド１３をスポッ
ト溶接することにより固定される。次いで、前記セラミ
ックロッド１２で固定された円筒電極１１の内側から例
えばバイト等の切断手段（図示せず）で前記円筒電極部
分のみを鞠方向に切断し、複数部分に分離する。この時
、円筒電極を２分すれば、バイポテンシヤル型のフオー
カスレンズが形成され、３個に分断するとュニポテンシ
ャル型のフオーカスレンズが形成される事になる。なお
、本実施例においては、円筒電極の外側を固定する手段
としてセラミックロッド１２を金属バンド１３でスポッ
ト溶接するものを示したが、他の方法例えばビーディン
グガラスを用いて固定する事も可能である。以上より明
らかなように、本発明によれば各電極の同軸度は円筒電
極の製造精度を高める事によって確保できるので複数個
の円筒電極のそれぞれの治具により同軸を保ちつつ、各
電極間を固定する従来からの製造方法によった場合に生
ずる円筒電極の公差、治臭の公差による同軸度のバラッ
キを除去する事ができるので、鞄芯のズレによるビーム
の歪を著しく小さくできる。In the figure, 11 is a hollow cylindrical electrode that is press-molded with high precision, and 12 is a plurality of bands 13 on the outside of the cylindrical electrode.
It is a ceramic rod fixed by spot welding. By the way, when manufacturing a focus lens, first, a hollow cylindrical electrode 1 that is press-molded with precision is used.
A plurality of ceramic rods 12 are fixed to the outside of the cylindrical electrode 11 along the axis of the cylindrical electrode 11 and symmetrically to the tube axis by spot welding a band 13. Next, from the inside of the cylindrical electrode 11 fixed by the ceramic rod 12, only the cylindrical electrode portion is cut in the crosswise direction using a cutting device such as a cutting tool (not shown), and separated into a plurality of parts. At this time, if the cylindrical electrode is divided into two parts, a bipotential type focus lens will be formed, and if it is divided into three parts, a unipotential type focus lens will be formed. In this embodiment, spot welding of the ceramic rod 12 with the metal band 13 was shown as a means for fixing the outside of the cylindrical electrode, but it is also possible to fix it by other methods, such as using beading glass. be. As is clear from the above, according to the present invention, the coaxiality of each electrode can be ensured by increasing the manufacturing precision of the cylindrical electrodes. Since it is possible to eliminate variations in coaxiality due to tolerances of cylindrical electrodes and odor control tolerances that occur when using the conventional fixed manufacturing method, distortion of the beam due to misalignment of the center of the bag can be significantly reduced.
従ってレンズの特性のバラッキを十分小さくおさえる事
ができる。なお、ここではフオーカスレンズについての
み説明したが、フオーカスレンズを製造する場合に限ら
ず、同軸度を保持する必要のある電極を製造する場合に
も応用できるものである。Therefore, variations in lens characteristics can be kept sufficiently small. Note that although only a focus lens has been described here, the present invention can be applied not only to the case of manufacturing a focus lens but also to the case of manufacturing an electrode that needs to maintain coaxiality.
第１図は従来からのフオーカスレンズの製造方法の説明
図、第２図は本発明の一実施例の説明図である。
１１……中空円筒電極、１２・・・・・・セラミックロ
ッド、１３・・・・・・金属バンド。
第７図
第２図FIG. 1 is an explanatory diagram of a conventional method for manufacturing a focus lens, and FIG. 2 is an explanatory diagram of an embodiment of the present invention. 11...Hollow cylindrical electrode, 12...Ceramic rod, 13...Metal band. Figure 7 Figure 2
Claims (1)
るフオーカスレンズの製造方法において、必要な長さの
中空円筒電極の外側に該円筒電極の管軸にそつて前記円
筒電極の複数箇所間を固定する手段を設ける工程と、前
記円筒電極を管軸方向に垂直に分断し、前記管軸方向に
分離した複数個の中空の円筒電極を形成する工程とから
成るフオーカスレンズの製造方法。1. In a method for manufacturing a focus lens in which a plurality of hollow cylindrical electrodes of the same diameter are arranged in series, a plurality of cylindrical electrodes are arranged outside the hollow cylindrical electrode of a required length along the tube axis of the cylindrical electrode. Manufacturing a focus lens comprising the steps of: providing a means for fixing between points; and dividing the cylindrical electrode perpendicularly to the tube axis direction to form a plurality of hollow cylindrical electrodes separated in the tube axis direction. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14056876A JPS6041414B2 (en) | 1976-11-22 | 1976-11-22 | Focus lens manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14056876A JPS6041414B2 (en) | 1976-11-22 | 1976-11-22 | Focus lens manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5364459A JPS5364459A (en) | 1978-06-08 |
| JPS6041414B2 true JPS6041414B2 (en) | 1985-09-17 |
Family
ID=15271700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14056876A Expired JPS6041414B2 (en) | 1976-11-22 | 1976-11-22 | Focus lens manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6041414B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4215116A (en) * | 1978-06-30 | 1980-07-29 | Block Drug Company Inc. | Propoxylate toxicants |
| JPS60236443A (en) * | 1984-05-10 | 1985-11-25 | Shimadzu Corp | Electrostatic lens for charged particles |
-
1976
- 1976-11-22 JP JP14056876A patent/JPS6041414B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5364459A (en) | 1978-06-08 |
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