television camera tube
Quick Summary
A television camera tube is a vacuum tube that converts an optical image into electrical impulses, forming the primary components of a picture signal. Early television cameras used mechanical spinning disks, but by the mid-20th century, these were replaced by electronic camera tubes.12
These tubes, such as the Iconoscope, Image Dissector, Orthicon, Image Orthicon, and Vidicon, utilize light-sensitive materials and electron beam scanning to create the signal. The Vidicon, for example, focuses an optical image onto a photoresistive layer. An electron beam then scans this layer, and the resulting electrical signal is derived from the changes in potential. Color cameras typically used three such tubes, each sensitive to a different primary color. While largely replaced by solid-state imagers today, these camera tubes were crucial to the development of television technology.2345
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