Illumination system for single objective lens binocular microscope

摘要

An illumination system is provided for a single objective lens-type binocular microscope. The arrangement features a slot cut in a single objective lens. A prism is inserted into this slot. An illuminating light flux is conducted to the prism at an axis different from the axis of observation through the objective lens. The prism conducts this light to the axis of observation so as to illuminate the area to be observed. Thus, the angle between the illuminating light flux and observing light flux can be made extremely small permitting the deep illumination of the area to be observed.