Video camera tubes were devices based on the cathode ray tube that were used in television cameras to capture television images prior to the introduction of charge-coupled device (CCD) image sensors in the 1980s. Several different types of tubes were in use from the early 1930s, and as late as the 1990s. . In these tubes, the cathode ray was scanned across an image of the …

A Geissler tube is an early gas discharge tube used to demonstrate the principles of electrical glow discharge, similar to modern neon lighting.The tube was invented by the German physicist and glassblower Heinrich Geissler in 1857. It consists of a sealed, partially evacuated glass cylinder of various shapes with a metal electrode at each end, containing rarefied gasses such …

Un tube cathodique (en anglais, cathode-ray tube : CRT) est un tube à vide constitué d'un filament chauffé, d'électrodes en forme de lentilles trouées qui, soumises à une différence de potentiel (tension), créent un champ électrique accélérant les électrons.Ces derniers viennent frapper l'écran, sur lequel est déposée une couche luminescente réagissant au choc des électrons en ...