JPS5488062A - Single-beam type electron gun - Google Patents

Single-beam type electron gun

Info

Publication number
JPS5488062A
JPS5488062A JP15588177A JP15588177A JPS5488062A JP S5488062 A JPS5488062 A JP S5488062A JP 15588177 A JP15588177 A JP 15588177A JP 15588177 A JP15588177 A JP 15588177A JP S5488062 A JPS5488062 A JP S5488062A
Authority
JP
Japan
Prior art keywords
electron gun
grids
denoted
grid
constituted
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.)
Granted
Application number
JP15588177A
Other languages
Japanese (ja)
Other versions
JPS6149782B2 (en
Inventor
Tsunenari Saito
Masahiro Kikuchi
Akio Ogoshi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sony Corp
Original Assignee
Sony Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Priority to JP15588177A priority Critical patent/JPS5488062A/en
Publication of JPS5488062A publication Critical patent/JPS5488062A/en
Publication of JPS6149782B2 publication Critical patent/JPS6149782B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To obtain an electron gun which has a sufficiently small astigmatism, by reducing the focal length of the lens system in the preceding stage which constitutes the electron gun.
CONSTITUTION: A singls-beam type electron gun is constituted by cathode K, an electrode from first grid G1 to fifth grid G5, lenses 1 and 2, etc., and high- voltage anode voltage VA is applied to grids G3 and G5, and focus voltage VF sufficiently lower than VA is applied to G4. Thus, decelerating preceding-stage electron lens 1 is constituted by grids G3 and G4 and accelerating succeeding-stage lens 2 is constituted by grids G4 and G5, and at this time, diameter D1 of each opposite end part of gride G3 and G4 is difined as smaller than diameter D2 of each opposite end part of G4 and G5. That is, when D1/D2 is denoted as K, K<1 is defined; and the length of the small diameter part and the large diameter part is denoted as l1 and l2 respectively, l1>D1 and are l2 > D2 are defined. Then, the length or grid G4 is denoted as l, and relation l>(D1+D2) is given, thereby improving astigmatism.
COPYRIGHT: (C)1979,JPO&Japio
JP15588177A 1977-12-24 1977-12-24 Single-beam type electron gun Granted JPS5488062A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15588177A JPS5488062A (en) 1977-12-24 1977-12-24 Single-beam type electron gun

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15588177A JPS5488062A (en) 1977-12-24 1977-12-24 Single-beam type electron gun

Publications (2)

Publication Number Publication Date
JPS5488062A true JPS5488062A (en) 1979-07-12
JPS6149782B2 JPS6149782B2 (en) 1986-10-31

Family

ID=15615538

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15588177A Granted JPS5488062A (en) 1977-12-24 1977-12-24 Single-beam type electron gun

Country Status (1)

Country Link
JP (1) JPS5488062A (en)

Also Published As

Publication number Publication date
JPS6149782B2 (en) 1986-10-31

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