JPS55121253A - Focusing lens of electron gun for cathode-ray tube - Google Patents
Focusing lens of electron gun for cathode-ray tubeInfo
- Publication number
- JPS55121253A JPS55121253A JP2786079A JP2786079A JPS55121253A JP S55121253 A JPS55121253 A JP S55121253A JP 2786079 A JP2786079 A JP 2786079A JP 2786079 A JP2786079 A JP 2786079A JP S55121253 A JPS55121253 A JP S55121253A
- Authority
- JP
- Japan
- Prior art keywords
- grid
- lens
- accelerating
- cathode
- 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
- H01J29/58—Arrangements for focusing or reflecting ray or beam
- H01J29/62—Electrostatic lenses
- H01J29/622—Electrostatic lenses producing fields exhibiting symmetry of revolution
- H01J29/624—Electrostatic lenses producing fields exhibiting symmetry of revolution co-operating with or closely associated to an electron gun
Abstract
PURPOSE:To widely suppress an aberration of the lens and enable a beam spot to be small in diameter, by arranging a plurality of electron lenses with at least an accelerating bipotential lens included in a front stage of the main electron lens. CONSTITUTION:On a central axis S of the electron gun, are arranged a cathode K, the first grid 1, the second grid 2, the third grid 3, the fourth grid 4, the fifth grid 5 and the sixth grid 6, which constitute a focusing lens Lf in the front stage. In the rear stage of the prearranged lens Lf, a focussing lens L is located. An accelerating bipotential lens is constructed by the first accelerating bipotential lens constituted by between the thrid grid 3 and the fourth grid 4 and the second accelerating bipotential lens constituted by between the fifth grid 5 and the sixth grid 6.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2786079A JPS55121253A (en) | 1979-03-09 | 1979-03-09 | Focusing lens of electron gun for cathode-ray tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2786079A JPS55121253A (en) | 1979-03-09 | 1979-03-09 | Focusing lens of electron gun for cathode-ray tube |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55121253A true JPS55121253A (en) | 1980-09-18 |
Family
ID=12232659
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2786079A Pending JPS55121253A (en) | 1979-03-09 | 1979-03-09 | Focusing lens of electron gun for cathode-ray tube |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55121253A (en) |
-
1979
- 1979-03-09 JP JP2786079A patent/JPS55121253A/en active Pending
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