JPS5519731A - Electron gun - Google Patents

Electron gun

Info

Publication number
JPS5519731A
JPS5519731A JP9224878A JP9224878A JPS5519731A JP S5519731 A JPS5519731 A JP S5519731A JP 9224878 A JP9224878 A JP 9224878A JP 9224878 A JP9224878 A JP 9224878A JP S5519731 A JPS5519731 A JP S5519731A
Authority
JP
Japan
Prior art keywords
electrode
thickness
cathode
diameter
grid
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
Application number
JP9224878A
Other languages
Japanese (ja)
Inventor
Hiroshi Suzuki
Katsuyuki Yamashita
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electronics 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 Matsushita Electronics Corp filed Critical Matsushita Electronics Corp
Priority to JP9224878A priority Critical patent/JPS5519731A/en
Publication of JPS5519731A publication Critical patent/JPS5519731A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To widely reduce the beam spot diameter when in a big current, by setting the values of proportion, to within a prescribed range, that is, the sum of distance across cathode G1 to electrode and thickness of electrode G2, each with respect to the electrode G1 hole diameter.
CONSTITUTION: When assumed g1 for the distance, between a cathode 1 and the first grid G1 electrode 2, t1 for the thickness of the G1 electrode 2 and D1 for the G1 electorde hole diameter, the value of (g1+t1)/D1 is made more than 0.4, with an aberration of cathode lens decreased to reduce the diameter of crossover. On the other hand, the ratio, of a second grid G2 electrode 3 thickness t2 for D1, t2/D1, is made more than 0.4, with a divergence angle 12 made small further with a setting made to within a range of (t2/D1<1) not to provide an excessive prefocus lens action. And to maintain the beam divergence angle 12 at an accurate value, the maximum value of (g1+t1)/D1 is determined to set to less than 0.8.
COPYRIGHT: (C)1980,JPO&Japio
JP9224878A 1978-07-27 1978-07-27 Electron gun Pending JPS5519731A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9224878A JPS5519731A (en) 1978-07-27 1978-07-27 Electron gun

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9224878A JPS5519731A (en) 1978-07-27 1978-07-27 Electron gun

Publications (1)

Publication Number Publication Date
JPS5519731A true JPS5519731A (en) 1980-02-12

Family

ID=14049116

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9224878A Pending JPS5519731A (en) 1978-07-27 1978-07-27 Electron gun

Country Status (1)

Country Link
JP (1) JPS5519731A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4852371A (en) * 1971-11-01 1973-07-23
JPS4958745A (en) * 1972-06-24 1974-06-07

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4852371A (en) * 1971-11-01 1973-07-23
JPS4958745A (en) * 1972-06-24 1974-06-07

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