CRT with elongated envelope having non-coaxial portions

Details CRT with elongated envelope having non-coaxial portions CRT with elongated envelope having non-coaxial portions

1988-02-02

1989-05-02

DeMeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Beam deflecting means

313495, 313477R, 313475, H01J 2986, H01J 2976

Patent

active

048271829

ABSTRACT:
A cathode ray tube useful as a transducer in a recording system is provided with a cylindrical envelope whose length is much longer than its width. An electron gun at one end of the envelope provides an electron beam directed for flow along the longitudinal axis of the envelope. A fiber optics faceplate is positioned to extend longitudinally in a sidewall of the envelope. The inner surface of the faceplate is coated with an electron-sensitive coating and the outer surface is positioned in contact with a recording medium. An array of electromagnets are positioned along the envelope and when energized the electron beam is deflected for repetitive linear scan of the faceplate. For relaxing the requirements of the deflecting system, various techniques are described, including modification of the tube envelope.

REFERENCES:
patent: 2244748 (1941-06-01), Walker
patent: 2657257 (1953-10-01), Lesti
patent: 2880341 (1959-03-01), Aiken et al.
patent: 2975230 (1961-03-01), Schlesinger
patent: 3609233 (1971-09-01), Nagao

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