Albrecht Wilhelm Tronnier

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Albrecht Wilhelm Tronnier (born February 19, 1902 in Göttingen ; † December 1, 1982 there ) was an influential German optics designer of the 20th century. In Germany alone, Tronnier successfully registered 124 patents.

Career history

Schneider Kreuznach

Tronnier joined Jos on October 1, 1924 as head of the scientific and mathematical office . Schneider Optical Works in Bad Kreuznach. He began there with a reorganization of the production program. During the management of Tronnier u. a. developed and patented:

The lenses developed by Tronnier were also of great military importance. Important war goods were, for example, the aero-xenars developed from 1934 for aerial reconnaissance . The xenon 1: 2.0 developed in 1934 was used from 1936 as an Air Force hand-held camera with a 12.5 cm focal length for 7x9 cm negatives and was built 54,950 times at ISCO (see below).

ISCO Göttingen

On July 1, 1936, Stefan Roeschlein took over the job from Tronnier, who had taken over the establishment of Schneider's Göttingen sister company, ISCO . In ISCO, which was founded on March 30, 1936 as "Jos. Schneider & Co., Optische Werke, Göttingen, KG", Tronnier was appointed managing director and authorized signatory. To expand the armaments production of Schneider, the Reich Ministry of Aviation accelerated the construction of a highly specialized factory in Göttingen. In addition to the aero xenars, the high -intensity night xenons for aerial reconnaissance were developed under Tronnier's direction in Göttingen :

  • 1940: night xenon 1: 1.5 / 300 mm,
  • 1943: Night xenon 1: 2.2 / 300 mm,
  • 1943: Night xenon 1: 2.3 / 400 mm,
  • 1944: Night xenon 300 mm f / 1.7.

The Xenar 1: 2.8 developed in 1937 was also sold internationally as the Kodak Ektar 1: 2.8.

In the 1940s, Tronnier also worked on the development of large military binoculars for aircraft observation and identification. For this purpose, he designed ultra-wide-angle eyepieces with an apparent field of view of 82 ° and 110 °.

Farrand Optical Company, New York

After the end of the Second World War, Tronnier stayed at least temporarily in the USA. For the Farrand Optical Company he worked on the development of the military field glasses T14 (7 * 50). In the mid to late 1950s, Tronnier, who lived in New York, filed several patents for Farrand (e.g. No. 2,807,983 for a fast, modified Gaussian double lens ; No. 2.923.203 for a fast lens with a large angle of view; also: 2,837,009). He filed a patent for an extremely fast lens (up to 1: 1.2 and below) for Farrand in 1955 (No. 2.861.500).

Voigtlander Braunschweig

Since 1944 Tronnier was a scientific advisor to Voigtländer in nearby Braunschweig . After the end of the Second World War, Tronnier worked, at least partially as a "freelancer" and initially at the request of the English occupation administration, for the Brunswick company Voigtländer. Important lenses developed for Voigtländer were

  • Color-Skopar 1: 2.8 (small picture) to 1: 3.6 (6x9 medium format); U.S. Patent 2,573,511; a Tessar variant derived from the older Skopar
  • Color-Heliar 1: 3.5 (6x9 medium format); DBP 888772; for the Bessa II
  • Ultron 1: 2.0 (small picture); U.S. Patents 2,627,204 and 2,627,205
  • Super Ultron 1: 0.87 (Suer-Farron 0.87),
  • Nokton 1: 1.5 (small picture); US patents 2,645,155 and 2,646,721 or the similar septon as a seven-lens version for single lens reflex cameras .

In 1956, Tronnier also filed a US patent for a telephoto lens (No. 2,810,322) for Voigtländer.

Zeiss / Voigtländer

From 1956 Voigtländer joined the West German Zeiss concern. For Zeiss / Voigtländer, Tronnier calculated until 1970 a. a.

Honors

On February 14, 1951, A. W: Tronnier was awarded the honorary title of Doctor of Engineering (Dr.-Ing. E. h.) At the suggestion of the Mathematical-Philosophical Faculty of the Technical University of Braunschweig .

literature

  • Lower Saxony Office for State Planning and Statistics: New Archive for Lower Saxony, Volume 5, in: Publications of the Lower Saxony Office for State Planning and Statistics, W. Dorn, Bremen-Horn, 1952, p. 69.

Literature by AW Tronnier

  • Albrecht Wilhelm Tronnier (1933) The deviations of inclined bundles of finite opening in the meridional section of centered lens systems. Union Publishing House. 4 p.
  • Albrecht Wilhelm Tronnier (1935) The modern look. Elsner. 2 pp.

Web links

Individual evidence

  1. ↑ grabsteine.genealogy.net family grave
  2. ↑ Patent research at DEPATISnet, accessed on July 14, 2011
  3. ^ Anniversary brochure from Jos. Schneider (1938) ( Memento from October 11, 2011 in the Internet Archive )
  4. ↑ H.-M. Brandt (1956) The Photo Lens. Structure and mode of operation of the most important brand lenses in world production. Friedr. Viehweg & Sohn, Braunschweig. P. 162
  5. ↑ H.-M. Brandt (1956) The Photo Lens. Structure and mode of operation of the most important brand lenses in world production. Friedr. Viehweg & Sohn, Braunschweig. Pp. 152, 217
  6. ↑ H.-M. Brandt (1956) The Photo Lens. Structure and mode of operation of the most important brand lenses in world production. Friedr. Viehweg & Sohn, Braunschweig. P. 137
  7. ↑ Image on hand-held camera , accessed on October 16, 2016
  8. ^ Anniversary brochure from Jos. Schneider (1938) ( Memento from October 11, 2011 in the Internet Archive )
  9. ^ RW Gordon (2007) A Chronological History of Smyth & Barlow Lenses. available online, accessed September 5, 2011
  10. ^ RW Gordon (2007) A Chronological History of Smyth & Barlow Lenses. available online, accessed September 5, 2011
  11. ↑ Arne Cröll (2005) Voigtländer large format lenses from 1949-1972. View Camera May / June 2005, pp. 34-42; Revised online version (PDF; 1.6 MB), accessed on November 24, 2011
  12. ↑ Receipt is still missing
  13. ↑ http://www.vdi-bs.de/docs/Pressemappe-BS12520081127_0159.pdf (link not available)
  14. ↑ H.-M. Brandt (1956) The Photo Lens. Structure and mode of operation of the most important brand lenses in world production. Friedr. Viehweg & Sohn, Braunschweig. Pp. 64, 139
  15. ↑ H.-M. Brandt (1956) The Photo Lens. Structure and mode of operation of the most important brand lenses in world production. Friedr. Viehweg & Sohn, Braunschweig. P. 143
  16. ↑ H.-M. Brandt (1956) The Photo Lens. Structure and mode of operation of the most important brand lenses in world production. Friedr. Viehweg & Sohn, Braunschweig. Pp. 77, 153
  17. ↑ H.-M. Brandt (1956) The Photo Lens. Structure and mode of operation of the most important brand lenses in world production. Friedr. Viehweg & Sohn, Braunschweig. P. 153
  18. ↑ Inventory B2 - files of honorary doctors ( memento from June 26, 2013 in the Internet Archive ), University Archives of the Technical University of Braunschweig, accessed July 13, 2011
personal data
SURNAME Tronnier, Albrecht Wilhelm
BRIEF DESCRIPTION German optics designer
DATE OF BIRTH February 19, 1902
PLACE OF BIRTH Goettingen
DATE OF DEATH 1st December 1982
Place of death Goettingen