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When setting up a compound microscope, it is important to optimize the illumination in order to produce clear and crisp images. There are four areas that should be considered when setting up the microscope illumination. #1 - Microscope Rheostat The microscope rheostat control can be found on the side of the compound microscope body. It will typically be a knob that is turned clockwise in order to …

Koehler illumination is obtained by focusing and centering microscopy light on the field of view in order to increase contrast and resolution. Koehler illumination was first introduced in 1893 by August Köhler of the Carl Zeiss corporation as a method of providing optimum specimen illumination. Microscope manufacturers have since designed microscopes with Koehler illumination so the collector …