The Compound Microscope Parts of the Microscope Care

The Compound Microscope Parts of the Microscope Care and Use How to Focus

Parts of the Compound Microscope eyepieces (or oculars) arm low-power objective revolving nosepiece stage clips coarse adjustment medium- and highpower objectives stage fine adjustment diaphragm light source base

Microscope Care and Use 1. Always carry the microscope by holding the arm with one hand supporting the base with the other hand. 2. Place the microscope on a flat surface with the arm bent toward you. 3. Look through the eyepiece and adjust the diaphragm so that light comes through the opening in the stage. 4. Place a slide on the stage so that the specimen is in the field of view; hold it in place with the stage clips. 5. ALWAYS focus first with the coarse adjustment and the low-power objective. 6. ONLY the fine adjustment is used with the highest power lens.

Microscope Care and Use • Change objectives by using the revolving nosepiece – keep your fingers off the lenses. • Special lens paper is needed to clean the objectives. Do not attempt to clean the lenses yourself. • Keep the microscope away from the edge of tables. • Before leaving your station, change back to the low-power objective, turn off the light source and cover the microscope. • Do not move the microscope towards you; instead, move over to the microscope.

How to Focus • To focus using the highest power lens, begin with the low-power objective and the coarse adjustment. • Make certain the object you want to view is in the center of your field of vision. • Once the object is clearly viewed, switch to the medium-power objective and focus using the coarse adjustment. field of vision leg of common house fly, 20 X

How to Focus • Once you can see the object clearly under medium-power, move the slide so that the area you want to see is in the center of the field of view. • Change to the high-power objective and focus using the FINE adjustment ONLY. • Recenter. knee joint, 100 X