Nikon’s Museum of Microscopy

Model GH Microscope

( Circa early 1970s )

Like the Model G, the Model GH microscope was a basic monocular light microscope, differing only in that it had a rectangular mechanical stage instead of a plain square stage.

Nikon Model GH Monocular Microscope with Mechanical Stage

Otherwise, the model GH came equipped with identical Model G specifications: an inclined monocular eyepiece tube, three eyepiece magnifications, two sets of objectives, and an Abbe two-lens condenser. The microscope could also accept most of the accessories designed for the Model S, such as the photomicrographic attachment, phase contrast equipment, episcopic illuminator, etc. A reflecting mirror provided illumination for this model from ambient daylight, an ordinary 60-watt light bulb, or a Nikon 15 watt substage lamp. The mirror had a flat surface on one side and a concave surface on the other to provide even illumination into the substage condenser (numerical aperture 1.3), which had an iris aperture diaphragm controlled by a single lever. There was also a filter case mounted beneath the condenser for use with color conversation, polarizing or compensating filters. The objective range offered with this model was 4x through 100x at modest numerical apertures. Focusing was accomplished through separate fine and coarse knurled knobs that moved the stage in relation to the microscope body. Specimen translation was accomplished with a pair of knurled chrome-plated knobs that moved the microscope slide in the X- and Y-directions.

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