Nikon’s Museum of Microscopy

Model S Epi-Illuminator

( Circa late 1960s )

The epi-illuminator converted the Model S microscope, built during the late 1960s, from a tool for studying translucent biological specimens into a tool for studying the surface of opaque specimens such as metals.

Nikon Model S Microscope with Epi-Illumination

The illuminator is housed in an intermediate tube positioned above the revolving nosepiece and beneath the binocular eyetubes of the microscope, providing a uniformly bright viewfield at all magnifications. A half-reflecting mirror swings out of the illuminator body making it easy to change from episcopic to diascopic illumination.

Green, yellow, and daylight filters were provided with the illuminator and a polarizing attachment was available as an accessory. The epi-illuminator could be used with any of the eyepiece tubes available for the Model S microscope.

Interchangeable parts made the Model S microscope a versatile tool for studies in biology, medicine, and metallurgy. Depending on the user's needs, it could be equipped with various combinations of eyepieces, eyepiece tubes, objectives, condensers, and stages.

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