Pinched electron beam cathode-ray tube with high-voltage einzel

Details Pinched electron beam cathode-ray tube with high-voltage einzel Pinched electron beam cathode-ray tube with high-voltage einzel

1991-02-11

1991-12-31

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

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

313414, H01J 2946, H01J 2956

Patent

active

050774980

ABSTRACT:
A cathode-ray tube (10) includes a prefocusing lens (14) and an adjacent high-voltage einzel focus lens (16) to form an electron beam with low spherical aberration. The high-voltage einzel focus lens includes a central lens element (52) positioned between a pair of outer lens elements (54) and (56). The outer lens elements receive a common high-voltage potential of more than about 12 kilovolts. The prefocusing lens includes a G3 electrode positioned between an anode (48) and a first one of the outer lens elements of the einzel focus lens. The G3 electrode receives the high voltage applied to the outer lens elements. In a preferred embodiment, the G3 electrode is a flat end disc plate (57b) on the end of the first one of the outer lens elements.

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Clinton Electronics Corp., Rockford, Ill., specification sheets and drawing re Model No. CE869W9P4, Apr. 1988.

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