JPS54144172A - Electron gun - Google Patents
Electron gunInfo
- Publication number
- JPS54144172A JPS54144172A JP5126878A JP5126878A JPS54144172A JP S54144172 A JPS54144172 A JP S54144172A JP 5126878 A JP5126878 A JP 5126878A JP 5126878 A JP5126878 A JP 5126878A JP S54144172 A JPS54144172 A JP S54144172A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- electrodes
- spherical aberration
- electron lens
- constitution
- 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
Abstract
PURPOSE: To decrease spherical aberration, by suitably selecting the electrode length and the electrode voltage, with the electrode constitution the same as the unipotential type electron lens.
CONSTITUTION: The electron lens is composed of three electrodes, and the same potential Eb is applied to the both electrodes 8, and Ef is applied to the intermediate electrode 9. In this case, the spherical aberration Cs is smaller by making longer the length Lf of the intermediate electrode 9, but it saturates at Lf/2R≥1.5. The longer Lf, the higher Ef, and it is recommended that the range of Lf is Lf/2R≤A-2 (Ef/Eb)2 + 0.85, where; A =0.185. Further, when three electrodes are almost of the same diameter, the electron lens having small spherical aberration can be constituted by this method.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5126878A JPS54144172A (en) | 1978-04-29 | 1978-04-29 | Electron gun |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5126878A JPS54144172A (en) | 1978-04-29 | 1978-04-29 | Electron gun |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54144172A true JPS54144172A (en) | 1979-11-10 |
Family
ID=12882189
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5126878A Pending JPS54144172A (en) | 1978-04-29 | 1978-04-29 | Electron gun |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54144172A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0723700A4 (en) * | 1992-08-28 | 1996-01-04 | Kern K N Chang | An improved cathode ray tube apparatus with reduced beam spot size |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5156175A (en) * | 1974-11-12 | 1976-05-17 | Matsushita Electric Ind Co Ltd | INKYOKUSEN KANDENSHIJU |
-
1978
- 1978-04-29 JP JP5126878A patent/JPS54144172A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5156175A (en) * | 1974-11-12 | 1976-05-17 | Matsushita Electric Ind Co Ltd | INKYOKUSEN KANDENSHIJU |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0723700A4 (en) * | 1992-08-28 | 1996-01-04 | Kern K N Chang | An improved cathode ray tube apparatus with reduced beam spot size |
EP0723700A1 (en) * | 1992-08-28 | 1996-07-31 | CHANG, Kern K. N. | An improved cathode ray tube apparatus with reduced beam spot size |
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