GB496603A - Improvements in or relating to electron lenses - Google Patents

Improvements in or relating to electron lenses

Info

Publication number
GB496603A
GB496603A GB21457/37A GB2145737A GB496603A GB 496603 A GB496603 A GB 496603A GB 21457/37 A GB21457/37 A GB 21457/37A GB 2145737 A GB2145737 A GB 2145737A GB 496603 A GB496603 A GB 496603A
Authority
GB
United Kingdom
Prior art keywords
electrode
diaphragm
diameter
electrodes
relating
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
GB21457/37A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB21457/37A priority Critical patent/GB496603A/en
Priority to US221920A priority patent/US2212208A/en
Publication of GB496603A publication Critical patent/GB496603A/en
Expired legal-status Critical Current

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

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

496,603. Cathode - ray tubes. KLEMPERER, O., and WRIGHT, W. D. Aug. 4, 1937, No. 21457. Addition to 480,857. [Class 39 (i)] In an electron lens which consists of coaxial cylindrical electrodes, the ratio of the effective diameters of which is between 1À5 : 1 and 2À5: 1, as described in the parent Specification, the electrode which has the smaller effective diameter is provided with a diaphragm intermediate its length to reduce longitudinal spherical aberration. The lens may consist of two electrodes 8, 9, Fig. 1, having the same diameter ; the electrode 8 is given the higher potential and contains the more nearly parallel of the incident and emergent beams. A diaphragm 10 in the electrode 8 has an aperture, the diameter of which is half that of the electrode 8, and is spaced from the end adjacent the electrode 9 a distance which is between half and twice, but is preferably equal to, the radius of the electrode 9. The diaphragm may be of frusto-conical or spherical shape.
GB21457/37A 1937-08-04 1937-08-04 Improvements in or relating to electron lenses Expired GB496603A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB21457/37A GB496603A (en) 1937-08-04 1937-08-04 Improvements in or relating to electron lenses
US221920A US2212208A (en) 1937-08-04 1938-07-29 Electron lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB21457/37A GB496603A (en) 1937-08-04 1937-08-04 Improvements in or relating to electron lenses

Publications (1)

Publication Number Publication Date
GB496603A true GB496603A (en) 1938-12-02

Family

ID=10163256

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21457/37A Expired GB496603A (en) 1937-08-04 1937-08-04 Improvements in or relating to electron lenses

Country Status (2)

Country Link
US (1) US2212208A (en)
GB (1) GB496603A (en)

Also Published As

Publication number Publication date
US2212208A (en) 1940-08-20

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