Usage examples (20)

• In this device, photons are detected by a photocathode similar to that in an image intensifier.
• In vidicons, the photosensitive surface stores charge rather than liberating electrons as in a photocathode.
• They have an input photocathode followed by a micro-channel plate electron multiplier and a phosphorescent output screen.
• Low levels of ambient light pass through a photocathode that converts the light photons to electrons, then amplifies them.