Prism system for a stereoscopic microscope
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United States of America Patent
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Apr 23, 1991
Grant Date -
N/A
app pub date -
Jul 28, 1989
filing date -
Jul 30, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A prism system for a stereoscopic microscope in which both an image inversion and also an interchanging of the sides of the two beam paths can occur. In order to achieve a reliable simply constructed design of a small size, the prism system has four reflecting surfaces for each beam path, of which two surfaces are constructed as reflection surfaces and are arranged in planes parallel with respect to the optic longitudinal axis. The two other surfaces are constructed as inlet or rather outlet surfaces and are inclined at 45.degree. with respect to the optic longitudinal axis and at 90.degree. with respect to one another. The inventive prism system makes it possible with a distinctly low structural height to interchange beam paths which are parallel with one another, and to carry out an image inversion at the same time. The prism system according to the invention can be utilized in particular in stereoscopic microscopes to carry out surgeries, in particular eye surgeries.
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