Electric lamp and discharge devices – Cathode ray tube – Ray generating or control
Patent
1982-12-13
1985-12-24
Moore, David K.
Electric lamp and discharge devices
Cathode ray tube
Ray generating or control
313382, 313383, 313458, H01J 2900, H01J 3126
Patent
active
045608997
ABSTRACT:
An electron beam focusing lens comprises at least two cylindrical electrodes one of which is to be applied with a high potential and the other of which is to be applied with a low potential. A plate electrode having an aperture at a central portion thereof is provided at an end face of the high-potential cylindrical electrode opposite to the low-potential cylindrical electrode. The plate electrode may be of a circularly curved shape which is projected toward the low-potential cylindrical electrode between the outer and inner circumference of the plate electrode.
REFERENCES:
patent: 3193721 (1965-07-01), Nakayama et al.
patent: 4268777 (1981-05-01), Van Roosmalen
Fukushima Masakazu
Maruyama Masanori
Takayama Shigehiko
Hitachi , Ltd.
Moore David K.
Wieder K.
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