Carl Zeiss AG (/zajs/ ZYSE, German: [ka乴 萾sajs]),[3][4] branded as ZEISS, is a German manufacturer of optical systems and optoelectronics, founded in Jena, Germany in 1846 by optician Carl Zeiss. Together with Ernst Abbe (joined 1866) and Otto Schott (joined 1884) he laid the foundation for today's multinational company. The current company emerged from a reunification of Carl Zeiss companies in East and West Germany with a consolidation phase in the 1990s.[5] ZEISS is active in four business segments with approximately equal revenue (Industrial Quality and Research, Medical Technology, Consumer Markets and Semiconductor Manufacturing Technology) in almost 50 countries, has 30 production sites and around 25 development sites worldwide.
Carl Zeiss opened an optics workshop in Jena in 1846. By 1847 he was making microscopes full-time. In 1861 the rapidly growing company had a staff of about 20[citation needed] and won a gold medal at the Thuringian Industrial Exposition.[8] By 1866 Zeiss sold their 1,000th microscope. In 1872 physicist Ernst Abbe joined Zeiss, and along with Otto Schott designed greatly improved lenses for the optical instruments they were producing. After Carl Zeiss's death in 1888, the business was incorporated as the Carl-Zeiss-Stiftung in 1889
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