Parts of the microscope and their functions
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Convex lenses are curved glass that are used in microscopes and glasses to bend and focus light. A microscope uses two convex lenses, an objective lens that gathers and magnifies the light from the specimen, focusing the image inside the body tube. The ocular lens at the top of the microscope then further magnifies this image for viewing. Turning the nose piece changes the objective lens, altering the magnification of the specimen.
Parts of the microscope and their functions
- 2. Convex Lenses are curved glass used to make microscopes (and glasses etc.) Convex Lenses bend light and focus it in one spot. How a Microscope Works
- 3. How a Microscope Works Ocular Lens (Magnifies Image) Objective Lens (Gathers Light, Magnifies And Focuses Image Inside Body Tube)Body Tube (Image Focuses) •Bending Light: The objective (bottom) convex lens magnifies and focuses (bends) the image inside the body tube and the ocular convex (top) lens of a microscope magnifies it (again).
- 4. Body Tube Nose Piece Objective Lenses Stage Clips Diaphragm Light Source Ocular Lens Arm Stage Coarse Adj. Fine Adjustment Base Skip to Magnification Section
- 6. Eyepiece / Ocular Lens • Magnifies the specimen image • It is where you look through to view the object placed on the stage.
- 7. Body Tube • It supports the eyepiece and lenses. • It also maintains the proper distance between the eyepiece and the objective lenses.
- 8. Nose Piece • It holds the objective lenses and can be turned to increase the magnification.
- 9. Objective Lenses • It is used to magnify the images of the specimen to form an enlarged image.
- 10. Stage Clips • These 2 clips hold the slide/specimen in place on the stage.
- 11. Diaphragm • It controls the amount of light on the slide/specimen Turn to let more light in or to make dimmer.
- 12. Mirror • It reflects light to the lens of the microscope.
- 13. Arm • It is the frame to which the base, body and stage are attached.
- 14. Stage • Supports the slide/specimen
- 15. Coarse Adjustment Knob • Moves the stage up and down LARGER focusing of the image.
- 16. • This knob moves the stage slightly to sharpen the image for PRECISION focusing. Fine Adjustment Knob
- 17. Base • Supports the microscope and is also used for carrying the microscope.
- 18. Magnification • To determine your magnification…you just multiply the ocular lens by the objective lens • Ocular 10x Objective 40x:10 x 40 = 400 Objective Lens have their magnification written on them. Ocular lenses usually magnifies by 10x So the object is 400 times “larger”
- 19. Caring for a Microscope • Clean only with a soft cloth/tissue • Make sure it’s on a flat surface • Carry it with 2 HANDS…one on the arm and the other on the base
- 20. Using a Microscope • Start on the lowest magnification • Don’t use the coarse adjustment knob on high magnification … you’ll break the slide. • Place slide on stage and lock clips • Adjust light source/ mirror. • Use fine adjustment to focus
- 21. Credits • You and the Natural World: Integrated Science by Lilia G. Vengco and Teresita F. Religioso. Phoenix Publishing House, Inc. • Discover Science by Allas, et. al. Diwa Learning Systems Inc. • http://www.freeclubweb.com/powerp oints/science/index.html