Scientists
Zacharias Janssen
yahn-sen
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Dutch spectacle maker traditionally credited, alongside Hans Lippershey, with building an early compound microscope around 1590. The claim rests entirely on testimony given in 1655 by his son Johannes, more than two decades after Zacharias died and inconsistent across retellings; historians Van Helden, Dupre, Van Gent and Zuidervaart concluded the son invented the story for fame and financial gain. Even Zacharias's own birth year is uncertain, given variously as 1580 to 1588.
The attribution itself is the subject of the dispute, not merely the date.
Facts
FieldOptics and instrument making 1 Cross-Tradition Connections
Invented
Why this is disputed. Credit for the first compound microscope around 1590 is debated among several Dutch spectacle makers of the same era.
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