katodestrålrør

Katodestrålrør, often abbreviated as KTR, is a vacuum tube technology that was widely used in electronic devices for displaying images and generating radio waves. Its fundamental principle involves the emission of a beam of electrons from a heated cathode. This electron beam is then accelerated and focused by an electron gun, which consists of several electrodes with specific voltage potentials.

The focused electron beam is directed towards a phosphorescent screen located at the front of the tube. When the electrons strike the screen, they cause the phosphors to emit light, thereby creating a visible image. In display applications, such as televisions and computer monitors, deflection coils or plates are used to steer the electron beam across the screen in a precise pattern, line by line, to form the complete image.

Beyond display devices, katodestrålrør have also been employed in oscilloscopes for visualizing electrical signals and in older radar systems. While largely superseded by newer technologies like LCD and LED for visual displays, the principles behind the katodestrålrør remain foundational in understanding electron beam manipulation and vacuum tube electronics. The development and widespread adoption of KTR technology played a significant role in the advancement of electronics during the 20th century.