kinoscope

The Kinescope was an early electronic device used for recording and displaying television images. Invented by Philo Farnsworth in 1929, it was a crucial component in the development of television technology. The Kinescope camera tube, also known as a cathode ray tube (CRT), was responsible for converting light signals into electrical signals that could be transmitted. Later versions of the CRT were used as the display screen in television sets for decades.

Farnsworth's Kinescope was a vacuum tube containing an electron gun that emitted a beam of electrons. This beam scanned across a phosphorescent screen inside the tube, creating a visible image. The intensity of the electron beam was modulated by the incoming television signal, causing different parts of the screen to glow brighter or dimmer, thus reproducing the original image. This principle formed the basis of early television broadcasting and reception. The term "Kinescope" itself is often associated with a method of recording television programs by filming the image displayed on a CRT screen, a practice common before the advent of video tape recording. While the original Kinescope camera tube is now obsolete, its underlying technology paved the way for modern electronic imaging and display systems.