Felix Jentzsch

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Felix Hermann Ferdinand Jentzsch (born September 14, 1882 in Königsberg , † November 10, 1946 in Berlin ) was a German physicist who dealt with applied optics and is known for inventing the microscope .

Jentzsch studied from 1902 at the TH Berlin-Charlottenburg and the University of Berlin with his doctorate in 1908 (on the electron emission of glowing metal oxides). Then he was an assistant at the TH Berlin and the University of Gießen and from 1909 employee of the optical workshops of Ernst Leitz I in Wetzlar and in 1912 he completed his habilitation in Gießen with the thesis Studies on Emission and Diffuse Reflection . Since 1914 he was a member of the Berlin Freemason Lodge Friedrich Wilhelm zur Morgenröthe . After military service in World War I from 1915 onwards, he became an extraordinary associate professor (with a teaching assignment for applied optics) in Gießen in 1919 and in Berlin in 1925. He became associate professor in 1928 and was personally full professor of physics at the University of Jena at the Institute for Microscopy and Applied Physics from 1932 to 1934 , of which he was director. In 1935 he left the university as a victim of political discrimination by the National Socialists.

At Leitz he developed a new type of binocular tube for microscopes, which was introduced in 1913 with great success and which was also taken over by other companies. The binocular tube made it possible to distribute the light from one lens to both eyes without reducing the numerical aperture . He also developed a mirror condenser. Jentzsch dealt with diffraction theory. He wrote several articles in the Handbuch der Physik .

He was the older brother of the mathematician Robert Jentzsch .

Fonts

  • The binocular microscope 1914
  • Limits of microscopy - beginning of molecular optics in 1930

Web links

Individual evidence

  1. ↑ Dieter Hoffmann, Mark Walker (Ed.) Between Autonomie and Adaptation , Wiley 2007, table with victims of racial and political discrimination of the DPG, p. 573
  2. ↑ Microscope Museum ( Memento of the original from May 13, 2011 in the Internet Archive ) Info: The archive link has been inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. @1@ 2Template: Webachiv / IABot / www.mikrebs-museum.de
personal data
SURNAME Jentzsch, Felix
ALTERNATIVE NAMES Jentzsch, Felix Hermann Ferdinand (full name)
BRIEF DESCRIPTION German physicist
DATE OF BIRTH September 14, 1882
PLACE OF BIRTH Koenigsberg
DATE OF DEATH November 10, 1946
Place of death Berlin