Hans Walter Hugo Busch[1] (27 February 1884 in Jüchen, North Rhine-Westphalia, Germany – 16 February 1973 in Darmstadt, Hesse) was a German physicist.
In 1940 Busch and his team started to work on data transmission in Peenemünde Army Research Center.
[1] Ernst Ruska read a paper by Busch in the academic journal Archives Elektrotechnik where Busch suggested that magnetic fields could be used to direct beams of electrons analogous to the way light is refracted by optical lenses.
[2] His proof that a small angle electron beam can be focused to a point by a cylindrical magnetic lens [3] was the basis for the development of the transmission electron microscope by Ruska and Knoll.
[4] In recognition of his work in the field, Busch was unanimously elected an honorary fellow of the German Society for Electron Microscopy at its first meeting in 1949.