Electron beam device having a glass envelope and a focussing len

Electric lamp and discharge devices – Cathode ray tube – Ray generating or control

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Details

313479, 313452, H01J 2946

Patent

active

055106706

ABSTRACT:
A focussing lens for an electron beam device is formed by a helically coiled resistance layer of a fired suspension of a conductive material of a mixture of a lead rathenate, a lead titanate and a ruthenium oxide in a glass formed of silicon dioxide, aluminum oxide and lead oxide.

REFERENCES:
patent: 4713879 (1987-12-01), Vrijssen
patent: 4827184 (1989-05-01), Spanjer et al.
patent: 4853589 (1989-08-01), Vrijssen
patent: 4857797 (1989-08-01), Vrijssen et al.

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