Device for the magnetic deflection of electron beams

Details Device for the magnetic deflection of electron beams Device for the magnetic deflection of electron beams

1977-10-12

1979-05-01

Harris, George

Electricity: magnetically operated switches, magnets, and electr

Magnets and electromagnets

Electron or ion beam deflecting type

335213, H01F 700

Patent

active

041526848

ABSTRACT:
A deflection device for the electron beam, in, for example, an image pick-up tube, comprising an annular yoke of a magnetic material, having at least two pairs of diametrically arranged, inwards directed cores which are enveloped by deflection coils. On the inner end of each core there is provided a poleshoe in the form of a ring segment, said poleshoes enclosing a deflection space. In order to ensure that the shape of the generated deflection fields can be accurately and reproducibly defined, each coil is situated, viewed from the deflection space, completely behind the associated poleshoe, the spaces between the poleshoes being bridged by intermediate pieces of a non-magnetic material.

REFERENCES:
patent: 2433682 (1947-12-01), Bradley
patent: 3355586 (1967-11-01), Brechna et al.
patent: 3835426 (1974-09-01), Torsch

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