Henry Siedentopf

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Henry Friedrich Wilhelm Siedentopf (born September 22, 1872 in Bremen , † May 8, 1940 in Jena ) was a German physicist and a pioneer of microscopy.

Life

Siedentopf worked for the Carl Zeiss company in Jena from 1899 to 1938 . There he was head of the microscopy department in 1907. From 1919 to 1940 he was associate professor for physics at the Institute for Microscopy and Applied Optics at the University of Jena .

In 1902/03 he designed the ultramicroscope (optical dark field method) together with Richard Zsigmondy . The ultramicroscope was suitable for the determination of small particles and became the most important instrument of colloid research in colloid chemistry . The chemist Zsigmondy was awarded the Nobel Prize for Chemistry in 1925 “for the elucidation of the heterogeneous nature of colloidal solutions and for the methods used for them, which are fundamental to modern colloid chemistry ”.

He also provided work on the development of microphotography and of slow-motion and time-lapse methods in micro- cinematography. In 1908 he invented the fluorescence microscope together with August Köhler (1866–1948) . In 1930 he was elected a member of the Leopoldina .

Honors

  • In Jena am Abbeanum and at his former house on August-Bebel-Str. 7 memorial plaques for Siedentopf were unveiled in 2006.

literature

Web links

Wikisource: Henry Siedentopf  - Sources and full texts
personal data
SURNAME Siedentopf, Henry
ALTERNATIVE NAMES Siedentopf, Henry Friedrich Wilhelm (full name)
BRIEF DESCRIPTION German physicist
DATE OF BIRTH September 22, 1872
PLACE OF BIRTH Bremen
DATE OF DEATH May 8, 1940
Place of death Jena