Cathode ray tube used as light source

Details Cathode ray tube used as light source Cathode ray tube used as light source

1980-05-07

1982-08-10

Gensler, Paul L.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Plural concentrating, accelerating, and/or de-accelerating...

313449, H01J 2946, H01J 2956

Patent

active

043440177

ABSTRACT:
The disclosed cathode ray tube for use as a light source has an electron gun including a first, a second and third grid electrodes similar to conventional three electrode electron guns but the axial length of the second grid electrode is adjusted to form a bipotential electron lens with the third grid electrode. An electron beam emitted from a cathode electrode is focussed by the electron lens and then diverged until it reaches an associated phosphor screen. The phosphor screen is luminesced with a desired diameter by the diverged electron beam.

REFERENCES:
patent: 2367130 (1945-01-01), Klemperer
patent: 3189784 (1965-06-01), Fyler
patent: 3374379 (1968-03-01), Maruyama et al.
patent: 3417199 (1968-12-01), Yoshida et al.
patent: 4287450 (1981-09-01), Kawakami et al.

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