![]() ![]() ![]() Controlling the blades affects the size of the aperture.Īnother well-known diaphragm is a Zeiss diaphragm that rotates. There are several types of iris diaphragms the most popular and widely used ones utilize a set of blades in a circular arrangement. The iris diaphragm is a design that allows adjustment and size of the aperture opening as we previously mentioned, the name iris is taken from the eye. Moreover, there’s a direct comparison between the expansion and contraction of the microscope’s diaphragm, which is similar to that of the eye’s iris. In effect, this reduces the illumination of the specimen but increases the contrast. The smaller the aperture on the iris diaphragm, the less light can pass through. The diaphragm sits between the condenser and the specimen. The iris diaphragm controls the aperture size, which is where the light passes through. To make this work, in the center of the diaphragm is a round hole called an aperture. In addition to that, it simultaneously controls the contrast between the background and the specimen. ![]() This light controls the illumination of the object in view. A diaphragm on a microscope is responsible for how much light leaves the microscope condenser. ![]()
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