Rapidly scanning cathode ray tube/scanning laser

Details Rapidly scanning cathode ray tube/scanning laser Rapidly scanning cathode ray tube/scanning laser

1994-12-16

1996-05-28

O'Shea, Sandra L.

Electric lamp and discharge devices

Cathode ray tube

Ray generating or control

313414, H01J 2962

Patent

active

055214649

ABSTRACT:
An electron-optical display device includes a cathode ray tube having a cylindrical neck of very small external diameter, such as .ltoreq.15 mm, the inner surface of the neck having thereon a helical multi-element layer electrode formed of a high ohmic resistance material, which electrode constitutes a focusing lens. In combination with a deflection system of correspondingly small diameter and operating at high scanning frequencies, this makes it possible to use a very small scanning spot of high luminance and without requiring excessive deflection energy. The device may be used as a television image projection tube or as an electron beam pumped scanning laser.

REFERENCES:
patent: 4539687 (1985-09-01), Gordon et al.
patent: 4853589 (1989-08-01), Vrijssen
patent: 4857797 (1989-08-01), Vrijssen et al.
patent: 5015925 (1991-05-01), Spanjer et al.
S. Colak et al., "Electron Beam Pumped II-VI Lasers", Journal of Crystal Growth, 72 (1985), pp. 504-511.

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