Pickup tube structure with an improved magnetic shield

Details Pickup tube structure with an improved magnetic shield Pickup tube structure with an improved magnetic shield

1978-02-21

1979-03-20

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Electron or ion beam deflecting type

335211, H01F 100

Patent

active

041456785

ABSTRACT:
A pickup tube structure comprises an image pickup tube and a yoke assembly mounted on the pickup tube. The yoke assembly includes a magnetic shield in a specific arrangement with respect to the axis of the pickup tube, as well as beam focusing and deflecting coils. The shield is shaped in a cylindrical form with an almost linear joint portion placed in parallel with the tube axis. The angle between the plane including the joint portion and the tube axis and the plane including the direction of the magnetic field for the beam horizontal deflection and the tube axis is not smaller than about -30.degree. and is not larger than about +30.degree..

REFERENCES:
patent: 2217409 (1940-10-01), Hepp
patent: 3052809 (1962-09-01), Bahring et al.
patent: 3974421 (1976-08-01), Holman

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