Is a Phototube the Same as a Photoresistor?

In the field of optical sensing within the electronics industry, many engineers, students, and tech enthusiasts often get confused or misled when searching for "Is a phototube a photoresistor?", especially in the context of Chinese online resources where the two terms are sometimes used interchangeably, causing misunderstandings. In reality, these two types of optical components differ fundamentally in their basic definitions, operating mechanisms, structural features, and performance characteristics. This article will systematically outline the core properties and differences between phototubes and photoresistors, starting from their fundamental concepts.

A phototube, also known as a photoelectric vacuum tube or photoemission tube, is an electronic device capable of converting incoming light signals into electrical signals. It primarily relies on the photoelectric effect to release and collect photoelectrons. Essentially, a phototube is a type of optical detector that converts light energy directly into an electric current through the electric field between the photocathode and the anode.

Get more details: https://www.smbom.com/news/46222