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Ernst August Friedrich Ruska (; 25 December 1906 – 27 May 1988)His Nobel bio claims he died on 25 May, while the Ruska memorial site says 27 May was a German physicist who won the Nobel Prize in Physics in 1986 for his work in electron optics, including the design of the first electron microscope.
After completing his PhD in 1933, Ruska continued to work in the field of electron optics, first at Fernseh AG in Berlin-Zehlendorf, and then from 1937 at Siemens. At Siemens, he was involved in developing the first commercially produced electron microscope in 1939. As well as developing the technology of electron microscopy while at Siemens, Ruska also worked at other scientific institutions, and encouraged Siemens to set up a laboratory for visiting researchers, which was initially headed by Ruska's brother Helmut Ruska, a medical doctor who developed the use of the electron microscope for medical and biological applications.
After leaving Siemens in 1955, Ruska served as director of the Institute for Electron Microscopy of the Fritz Haber Institute until 1974. Concurrently, he served at the institute and as professor at Technische Universität Berlin from 1957 until his retirement in 1974.
In 1960 he won the Lasker Award. In 1986, he was awarded half of the Nobel Prize in Physics for his many achievements in electron optics; Gerd Binnig and Heinrich Rohrer won a quarter each for their design of the scanning tunneling microscope. He died in West Berlin in 1988.
Asteroid 1178 Irmela, discovered by Max Wolf, is named after Ruska's wife Irmela, who was Wolf's niece.
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