Microscope Parts and Functions

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Presentation transcript:

Microscope Parts and Functions Presented by: Joevani S. Peñol

Microscope An optical instrument that uses a lens or a combination of lenses to produce magnified images of small objects, especially of objects too small to be seen by the unaided eye.

Microscope Parts and Functions Arm- Supports the tube and connects it to the base Base- The bottom of the microscope, used for support Eyepiece- Where you look to see the image of your specimen.

Eyepiece Arm Base

Microscope Parts and Functions Body tube- Connects the eyepiece to the objective lenses. Revolving Nosepiece- This is the part that holds two or more objective lenses and can be rotated to easily change power. Stage- The flat platform where you place your slides.

Body tube Revolving Nosepiece Stage

Microscope Parts and Functions Fine Adjustment Knob-small, round knob on the side of the microscope used to fine-tune the focus of your specimen Coarse Adjustment Knob--large, round knob on the side of the microscope used for focusing the specimen. Stage Clips-hold the slide in place

Stage Clips Coarse Adjustment Knob Fine Adjustment Knob

Microscope Parts and Functions Iris Diaphragm- controls the light going thorough the aperture. Mirror/Light source-used to reflect light to the specimen/source of light. Objective lenses-may have (scanner, Low, high Oil immersion objectives) and is used use to increase the magnification of the specimen.

Objective Lenses Iris Diaphragm Light Source

Microscope Parts and Functions Aperture is the hole in the stage through which the base (transmitted) light reaches the stage. Condenser is used to collect and focus the light from the illuminator on to the specimen. It is located under the stage often in conjunction with an iris diaphragm.

Proper Way of Focusing the Microscope Always observe the specimen or object using the LOWEST POWER object first. Focus using the COARSE ADJUSTMENT KNOB to bring the object into focus. Bring the object into sharp focus by using the fine adjustment knob.

Proper Way of Focusing the Microscope Focus, and then move to a higher power objective, if needed. Use only the FINE ADJUSTMENT KNOB when using the HIGHEST (longest) POWER OBJECTIVE.

Proper Way of Focusing the Microscope Keep both eyes open to reduce eyestrain. Keep eye slightly above the eyepiece to reduce eyelash interference. To find out the total magnification of the object, multiply the power of the eyepiece lens (10X) by the power of the objective.

Handling the Microscope Always use two hands to move the microscope. Place one hand around the arm, lift the scope, and then put your other hand under the base of the scope for support. Be gentle.

Storing the Microscope Dust is an enemy to microscope lenses; always keep the microscope covered when not in use.

References http://www.thefreedictionary.com/microscope http://www.saskschools.ca/curr_content/biology20/unit1/UNIT1MODULE2LESSON1c.htm http://www.microscope-microscope.org/basic/microscope-parts.htm