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Developmental Biology
It had two tubes tilted towards each
other at a convergence angle of 14
degrees with objective lenses at the
lower ends. Carl Zeiss ensured that
the axes on the two lenses were in
one plane, i.e. they actually intersected.
Porro erecting prisms were used
between the lenses and the eyepieces.
These prisms ensure that images
are upright and unreversed, i. e.
the images can be viewed as they
are in reality. This was also a demand
from Greenough and the guarantee
of a true orthoscopic impression
when looking through the stereomicroscope,
or dissecting microscope
as it was called back then.
The invention of the stereomicroscope
at Carl Zeiss was an essential
contribution to the rapid upswing in
the still young developmental and
Innovation 15, Carl Zeiss AG, 2005
marine biology: the Greenough stereomicroscope
enabled exact research
into the lifecycle of many invertebrates
(e. g. polyps, bristle worms,
snails) for the first time. It also contributed
considerably to the most important
discoveries in developmental
biology and genetics of the early 20 th
century (Wilhelm Roux, Hans Spemann,
Thomas Hunt Morgan).
Today, the SteREO Lumar. V12 is
setting new standards for the fluorescence
microscope examination of
complex issues related to developmental
genetics in biological and
clinical research.
www.zeiss.de/micro
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Fig. 2:
Sketch of Greenough’s
idea for a binocular
microscope that renders
true 3D images.
Fig. 3:
The Greenough
double microscope
from Carl Zeiss.
Fig. 4:
Dissecting microscope
following the design
of Paul Mayer.
Fig. 5:
SteREO Lumar.V12.
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