Details of electron-optical or ion-optical arrangements common to two or more basic types of discharge tubes or lamps

Introduced: September 1968

Last revised: January 2006

Classification Context

ELECTRON sources in discharge tubes; ELECTRON gunselectron or ion GUNSgenerating or handling ION(S) in discharge tubesION(S) guns

12 direct subcodes

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H01J 3/02 Electron guns
H01J 3/04 Ion guns
H01J 3/06 two or more guns being arranged in a single vacuum space, e.g. for plural-ray tubes
H01J 3/07 Arrangements for controlling convergence of a plurality of beams
H01J 3/08 Arrangements for controlling intensity of ray or beam
H01J 3/1 Arrangements for centering ray or beam
H01J 3/12 Arrangements for controlling cross-section of ray or beam; Arrangements for correcting aberration of beam, e.g. due to lenses
H01J 3/14 Arrangements for focusing or reflecting ray or beam
H01J 3/26 Arrangements for deflecting ray or beam
H01J 3/36 Arrangements for controlling the ray or beam after passing the main deflection system, e.g. for post-acceleration or post-concentration
H01J 3/38 Mounting, supporting, spacing, or insulating electron-optical or ion-optical arrangements
H01J 3/4 Arrangements for removing or diverting unwanted particles, e.g. for negative ions or fringing electrons; Arrangements for velocity or mass selection