deflection yoke
kind of magnetic lens, used in cathode ray tubes (CRT) to scan the electron beam both vertically and horizontally over the whole screen
en-GB/dɪˈflɛkʃn ˈjəʊk/
en-US/dɪˈflɛkʃən ˈjoʊk/
kind of magnetic lens, used in cathode ray tubes (CRT) to scan the electron beam both vertically and horizontally over the whole screen