Electron gun

Details Electron gun Electron gun

H - Electricity

01

J

313/35.32

H01J 29/48 (2006.01)

Patent

CA 1196677

ABSTRACT OF THE DISCLOSURE An electron gun of uni-potential type is disclosed, which includes a main electron lens system consisting of a front electron lens system formed of a third grid and a fourth grid and a rear electron lens system formed of the fourth grid and a fifth grid of which the electron lens action regions are separated from each other. In this case, the electron lens diameter of the front electron lens system is selected smaller than that of the rear electron lens system, and the aperture diameter of the fifth grid in the rear electron lens system is selected larger than that of the fourth grid, and may be nearly as large as the inner diameter of the tube in which it is placed for use.

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