An electron source of the field emission type

Details An electron source of the field emission type An electron source of the field emission type

1989-12-18

1991-12-03

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

313336, H01J 2952

Patent

active

050702823

ABSTRACT:
An electron source is formed by at least one elementary electron emitter in which an emissive point having a very small radius of curvature operates on the field emission principle and produces an electron beam, the intensity of which is independent of any possible variations of electron emission. The emissive point cooperates with an extracting electrode, and a control electrode having a negative potential with respect to the extracting electrode is placed downstream of the extracting electrode with respect to the direction of propagation of the beam.

REFERENCES:
patent: 3753022 (1973-08-01), Fraser, Jr.
patent: 3810025 (1974-05-01), Aihara et al.
patent: 4513308 (1985-04-01), Green et al.
patent: 4578614 (1986-03-01), Gray et al.
patent: 4596942 (1986-06-01), Oshima et al.
patent: 4663559 (1987-05-01), Christensen
patent: 4721885 (1988-01-01), Brodie

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