CRT lensing electrodes having tapered apertures

摘要

The invention pertains to an improved lensing means employed in compact plural beam in-line CRT electron gun assemblies resulting in small round spot sizes on the screen. This is effected by forming cooperating tapered apertures in a low potential lensing electrode and similar facing apertures in an adjacent high potential lensing electrode. The larger openings of the two sets of facing tapered apertures provide lenses of larger than normal dimensions. Additionally, partial overlapping of the apertures permits even larger lenses in the available electrode areas, thereby effecting further improved lensing of the beams.