A DEFLECTION SYSTEM WITH A PAIR OF QUADRUPOLE ARRANGEMENTS

摘要

A deflection apparatus comprising a cathode ray tube includes a pair of quadrupole arrangements (324, 424) for producing a pair of quadrupole fields in a beam path of an electron beam at different distances from a display screen (22"). In an embodiment of the invention, the first and second quadrupole arrangements and a main deflection field producing arrangement (55") cooperate to converge three electron beams, R, G and B, with one another, said quadrupoles being quadrupole doublets.