In-line type electron gun

Details In-line type electron gun In-line type electron gun

H - Electricity

01

J

313/35.14

H01J 29/50 (2006.01) H01J 29/48 (2006.01)

Patent

CA 1272503

ABSTRACT OF THE DISCLOSURE The in-line type electron gun of this invention is formed so that a depression, which is formed at the lower voltage electrode face opposing to the higher electrode of the two electrodes for forming a common main focusing lens in the opposing gap thereof and has three lens holes for in- dividual electron beams arrayed in-line at the bottom there- of, is formed so that the width in the direction perpendicu- lar to the lens hole array direction is smaller at the cen- tral part in the lens hole array direction as compared with the other parts. Also the center lens hole of the three lens holes at the bottom of the depression is smaller in di- ameter than the other two. Accordingly, the focus voltages of the three beams passing through the three lens holes and the shapes of beam spots are made more uniform as compared with the prior art.

518520

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