When carrying a microscope, grab the arm with one hand and place your other hand under the base.Īrticulated Arm: A type of stand that holds a microscope body. The result is a better (but not perfect) alignment of some of the colors at the focal point, thereby giving you a clearer image.Īrm: The part of the microscope that connects the tube to the base. These lenses are made of different types of glass with different indexes of refraction. To help correct this problem, achromatic lenses are used. Some colors refract more than others and as a result, will focus at different points, reducing resolution. There are two types: one is a spiral type that you turn to move it up or down and the other is on a rack and pinion system and controlled with a condenser focusing knob.Īchromatic Lenses: When light goes through a prism or lens, it is bent or refracted.

Most microscopes that go to 1000x use Abbe condensers with a 1.25 N.A. The condenser lens system should have a numerical aperture equal to or greater than the numerical aperture (N.A.) of the objective lens being used. Abbe condensers really become useful at magnifications above 400x. By changing the size of the iris and moving the lens toward or away from the stage, the diameter and focal point of the cone of light that goes through the specimen can be controlled. It has an iris type aperture to control the diameter of the beam of light entering the lens system. Abbe Condenser: A specially designed lens that mounts under the stage and is usually movable in the vertical direction.

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