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The light diaphragm
The condenser and iris diaphragm.
Equipped on the Condenser of the microscope, the iris diaphragm is a shutter controlled by a lever that is used to regulate the amount of light entering the lens system.
The Iris diaphragm in the condenser. (the lever sticking out just above the "8" in the image above.
The diaphragm reduces the light from under the stage which can improve the image contrast.
The Diaphragm of the microscope regulates the amount of light shown.
The light diaphragm
The light diaphragm
A diaphragm regulates the amount of light entering the microscope. Stage opening allows light to pass through the stage of the microscope.
Too much light overwhelms the eye's ability to distinguish contrast and therefore detail in the specimen. Microscopes therefore have the ability to reduce the amount of light impinging on the specimen using a diaphragm, rather like the iris of the eye does.
light source: An attached lamp that directs a beam of light up through the object.
The condenser and iris diaphragm.
The light diaphragm
An iris diaphragm controls the amount of light admitted to a lens. Closing the iris diaphragm will decrease the brightness and increase the contrast of an image.
You can't change the contrast on the microscope, that would have to be done using dyes.
the diaphragm controls the amount of light entering the microscope
The microscope that is used to see internal structures of cells in a natural state is the compound light microscope. The microscope has a lens and light that allows it to see the internal structures of a cell clearly.