JPS59117049U

JPS59117049U - Image tube

Info

Publication number: JPS59117049U
Application number: JP1088583U
Authority: JP
Inventors: 洋後藤
Original assignee: 株式会社東芝
Priority date: 1983-01-28
Filing date: 1983-01-28
Publication date: 1984-08-07

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図及び第２図は従来の撮像管の２つの例を示す要部
断面図、第３図はこの考案の一実施例に係る撮像管を示
す要部断面図である。１・・・面板、２・・・透明導電膜、３・・・光導電膜
、９・・・信号取出し用電極棒、１０・・・電子ビーム
、１６ａ、１６ｂ・・・ウオール電極、１８・・・封着
材、１９・・・金属リング、２０・・・真空外囲器、２
０ａ・・・径大部、２０ｂ・・・径小部、２１・・・金
属メツシュ、２２・・・メツシュリング、２３・・・メ
ツシュ電極、２４・・・メツシュ保持リング。1 and 2 are sectional views of main parts showing two examples of conventional image pickup tubes, and FIG. 3 is a sectional view of main parts of an image pickup tube according to an embodiment of this invention. DESCRIPTION OF SYMBOLS 1... Face plate, 2... Transparent conductive film, 3... Photoconductive film, 9... Electrode rod for signal extraction, 10... Electron beam, 16a, 16b... Wall electrode, 18... ...Sealing material, 19...Metal ring, 20...Vacuum envelope, 2
0a... Large diameter part, 20b... Small diameter part, 21... Metal mesh, 22... Mesh ring, 23... Mesh electrode, 24... Mesh holding ring.

Claims

[Scope of utility model registration request]

(1) A face plate with a transparent conductive film and a photoconductive film formed on the inner surface is attached to the open end of the large diameter part of the vacuum envelope, which has a bottomed cylindrical shape and houses an electron gun, and has a large diameter part and a small diameter part. In an image pickup tube which is air-sealed with a sealing material and has a wall electrode formed on each inner surface of the large diameter part and the small diameter part insulated from each other, the large diameter part faces the photoconductive film. Then, a mesh electrode made of a metal mesh stretched over the mesh ring is provided, and a cylindrical mesh holding ring that holds this mesh electrode is brought into close contact with the wall electrode on the inner surface of the large diameter portion, and the sealing material is electrically connected. and an imaging tube characterized in that it is mechanically connected and fixed.

(2) The inner diameter of the mesh electrode is at least larger than the inner diameter of the small diameter portion, and the length of the mesh holding ring is set to be approximately equal to the length of the large diameter portion. The imaging tube according to item 1.