Image orthicon

An Image Orthicon is a type of television camera tube developed in the 1940s that converts light images into electrical signals for broadcasting. It uses a photocathode to turn light into electrons, then a series of electron streams and prisms to scan the image line by line. As the electrons are processed, they produce an electrical signal that accurately represents the brightness and details of the original scene. This technology was known for its high sensitivity and image quality, making it a key advancement in early television broadcasting before electronic sensors replaced it.