GB835271A - Periodic magnetic electron beam focusing arrangement - Google Patents

Periodic magnetic electron beam focusing arrangement

Info

Publication number
GB835271A
GB835271A GB2609956A GB2609956A GB835271A GB 835271 A GB835271 A GB 835271A GB 2609956 A GB2609956 A GB 2609956A GB 2609956 A GB2609956 A GB 2609956A GB 835271 A GB835271 A GB 835271A
Authority
GB
United Kingdom
Prior art keywords
electron beam
beam focusing
focusing arrangement
periodic magnetic
magnetic electron
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.)
Expired
Application number
GB2609956A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB2609956A priority Critical patent/GB835271A/en
Publication of GB835271A publication Critical patent/GB835271A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • H01J23/08—Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream
    • H01J23/087—Magnetic focusing arrangements
    • H01J23/0873—Magnetic focusing arrangements with at least one axial-field reversal along the interaction space, e.g. P.P.M. focusing
    • 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
    • H01J29/64—Magnetic lenses
    • H01J29/68—Magnetic lenses using permanent magnets only

Abstract

835,271. Electron beam focusing apparatus. STANDARD TELEPHONES & CABLES Ltd. (Nippon Electric Co. Ltd.). Aug. 27, 1956 No. 26099/56. Class 39(1). [Also in Group XXXV] Annular permanent magnets for periodic focusing are axially magnetized so that the poles are situated on the ends of the inner surface of the annulus, so that the return flux 9 passes through the body of the magnet. The magnets are arranged end to end with ring pole pieces 10, Fig. 4, inside and covering the joins.
GB2609956A 1956-08-27 1956-08-27 Periodic magnetic electron beam focusing arrangement Expired GB835271A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2609956A GB835271A (en) 1956-08-27 1956-08-27 Periodic magnetic electron beam focusing arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2609956A GB835271A (en) 1956-08-27 1956-08-27 Periodic magnetic electron beam focusing arrangement

Publications (1)

Publication Number Publication Date
GB835271A true GB835271A (en) 1960-05-18

Family

ID=10238359

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2609956A Expired GB835271A (en) 1956-08-27 1956-08-27 Periodic magnetic electron beam focusing arrangement

Country Status (1)

Country Link
GB (1) GB835271A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3328619A (en) * 1963-06-17 1967-06-27 Gen Electric Aiding magnets for minimizing length of reversal zone
DE2403627A1 (en) * 1973-01-26 1974-08-01 Thomson Csf CONCENTRATING DEVICE FOR AN ELECTRON TUBE
EP0522544A1 (en) * 1991-07-10 1993-01-13 Matsushita Electric Industrial Co., Ltd. Flat tube display apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3328619A (en) * 1963-06-17 1967-06-27 Gen Electric Aiding magnets for minimizing length of reversal zone
DE2403627A1 (en) * 1973-01-26 1974-08-01 Thomson Csf CONCENTRATING DEVICE FOR AN ELECTRON TUBE
EP0522544A1 (en) * 1991-07-10 1993-01-13 Matsushita Electric Industrial Co., Ltd. Flat tube display apparatus
US5325014A (en) * 1991-07-10 1994-06-28 Matsushita Electric Industrial Co., Ltd. Flat tube display apparatus

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