Cathode ray tubes (CRTs)

Abstract

The cathode ray tube as the key component of a classical TV set and its basic principles and components are described and illustrated. From the emission of electrons through an oxide cathode, the formation of a concentrated electron beam by different focusing techniques, a moving image is generated by a rapidly deflected flow of electrons, which are converted to visible light on a phosphor screen. The basic concepts of cathodes, various electron guns, deflection methods, color generation, and limitations of possible resolution and failure effects are discussed.