Édouard Belin

In 1907 Belin invented a phototelegraphic apparatus called the Bélinographe (télestéréographe)—a system for receiving photographs over telephone wires via telegraphic networks.

[1] Belin's invention had been used for journalistic photos since 1914, and the process was improved by 1921 to enable transmission of images by radio waves.

In 1926, with Holweg, he tested the capacity for the eye to perceive pictures proposed at a very high speed, using a mirror drum.

[3] Belin was born in Vesoul, Haute-Saône, France, and died, aged 86, in Territet, Canton of Vaud, Switzerland.

At each point a measurement of light intensity[clarification needed] is made with an electric eye.