JPS54157076A - Electron gun - Google Patents

Electron gun

Info

Publication number
JPS54157076A
JPS54157076A JP6536878A JP6536878A JPS54157076A JP S54157076 A JPS54157076 A JP S54157076A JP 6536878 A JP6536878 A JP 6536878A JP 6536878 A JP6536878 A JP 6536878A JP S54157076 A JPS54157076 A JP S54157076A
Authority
JP
Japan
Prior art keywords
lens
caliber
grids
distance
relation
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
JP6536878A
Other languages
Japanese (ja)
Other versions
JPH0353733B2 (en
Inventor
Tsunenari Saito
Masahiro Kikuchi
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 JP6536878A priority Critical patent/JPS54157076A/en
Publication of JPS54157076A publication Critical patent/JPS54157076A/en
Publication of JPH0353733B2 publication Critical patent/JPH0353733B2/ja
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To improve effectively aberration by making the caliber of a deceleration- type bipotential lens system smaller than the caliber of the extended field effect-type acceleration lens system and holding the practical focus relation of an electron gun.
CONSTITUTION: Anode voltage VA is applied to grids G3 and G6, and voltages 0.3VA and 0.5VA are applied to grids G4 and G5 respectively. Then, deceleration- type bipotential lens 1 is constituted by grids G3 and G4, and extended field effect- type acceleration lens 2 is constituted by grids G4, G6 and G5. The relation between caliber D1 (the edge diameter opposite to G3 and G4) of lens 1 and caliber D2 (the edge diameter of G4 and G6 opposite to G5) of lens 2 is selected to be 0.3≤D1/ D2<1. Then, the lens interval, the distance from lens 1 to the caliber step part of grid G4, the distance from the step part to the intermediate point between G4 and G5, and the distance from the intermediate point between G4 and G5 to the intermediate point between G5 and G6 are denoted as l, λ2, λ3, and λ4, and the relation among them is selected to be λ2+λ3=l-λ4/2≥2D2. Further, when 0.3≤λ4/D2≤ 1 is selected, this main electron lens has a small spherical aberration, and blooming of a beam spot is avoided effectively on the fluorescent surface.
COPYRIGHT: (C)1979,JPO&Japio
JP6536878A 1978-05-31 1978-05-31 Electron gun Granted JPS54157076A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6536878A JPS54157076A (en) 1978-05-31 1978-05-31 Electron gun

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6536878A JPS54157076A (en) 1978-05-31 1978-05-31 Electron gun

Publications (2)

Publication Number Publication Date
JPS54157076A true JPS54157076A (en) 1979-12-11
JPH0353733B2 JPH0353733B2 (en) 1991-08-16

Family

ID=13284940

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6536878A Granted JPS54157076A (en) 1978-05-31 1978-05-31 Electron gun

Country Status (1)

Country Link
JP (1) JPS54157076A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58147943A (en) * 1982-09-25 1983-09-02 Sony Corp Electron gun

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58147943A (en) * 1982-09-25 1983-09-02 Sony Corp Electron gun

Also Published As

Publication number Publication date
JPH0353733B2 (en) 1991-08-16

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