1 / 25

The History and Working of a Microscope

Explore the history of microscopes, from ancient lens usage to the invention of the compound microscope. Learn how microscopes work and understand their parts. Discover essential tips for caring for and using a microscope correctly.

cjessie
Download Presentation

The History and Working of a Microscope

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Microscope www.assignmentpoint.com

  2. The History • Many people experimented with making microscopes • Was the microscope originally made by accident? (Most people were creating telescopes) • The first microscope was 6 feet long!!! • The Greeks & Romans used “lenses” to magnify objects over 1000 years ago. www.assignmentpoint.com

  3. The History • Hans and Zacharias Janssen of Holland in the 1590’s created the “first” compound microscope • Anthony van Leeuwenhoek and Robert Hooke made improvements by working on the lenses Robert Hooke 1635-1703 Anthony van Leeuwenhoek 1632-1723 Hooke Microscope www.assignmentpoint.com

  4. The History The “First” Microscope Zacharias Jansen 1588-1631 www.assignmentpoint.com

  5. How a Microscope Works Convex Lenses are curved glass used to make microscopes (and glasses etc.) Convex Lenses bend light and focus it in one spot. www.assignmentpoint.com

  6. 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). www.assignmentpoint.com

  7. The Parts of a Microscope www.assignmentpoint.com

  8. Ocular Lens Body Tube Nose Piece Arm Objective Lenses Stage Stage Clips Coarse Adj. Diaphragm Fine Adjustment Light Source Base www.assignmentpoint.com Skip to Magnification Section

  9. Body Tube • The body tube holds the objective lenses and the ocular lens at the proper distance Diagram www.assignmentpoint.com

  10. Nose Piece • The Nose Piece holds the objective lenses and can be turned to increase the magnification Diagram www.assignmentpoint.com

  11. Objective Lenses • The Objective Lenses increase magnification (usually from 10x to 40x) Diagram www.assignmentpoint.com

  12. Stage Clips • These 2 clips hold the slide/specimen in place on the stage. Diagram www.assignmentpoint.com

  13. Diaphragm • The Diaphragm controls the amount of light on the slide/specimen Turn to let more light in or to make dimmer. Diagram www.assignmentpoint.com

  14. Light Source • Projects light upwards through the diaphragm, the specimen and the lenses • Some have lights, others have mirrors where you must move the mirror to reflect light Diagram www.assignmentpoint.com

  15. Ocular Lens/Eyepiece • Magnifies the specimen image Diagram www.assignmentpoint.com

  16. Arm • Used to support the microscope when carried. Holds the body tube, nose piece and objective lenses Diagram www.assignmentpoint.com

  17. Stage • Supports the slide/specimen Diagram www.assignmentpoint.com

  18. Coarse Adjustment Knob • Moves the stage up and down (quickly) for focusing your image Diagram www.assignmentpoint.com

  19. Fine Adjustment Knob • This knob moves the stage SLIGHTLY to sharpen the image Diagram www.assignmentpoint.com

  20. Base • Supports the microscope Diagram www.assignmentpoint.com

  21. Magnification www.assignmentpoint.com

  22. Magnification • To determine your magnification…you just multiply the ocular lens by the objective lens • Ocular 10x Objective 40x:10 x 40 = 400 So the object is 400 times “larger” Objective Lens have their magnification written on them. Ocular lenses usually magnifies by 10x www.assignmentpoint.com

  23. Caring for a Microscope • Clean only with a soft cloth/tissue • Make sure it’s on a flat surface • Don’t bang it • Carry it with 2 HANDS…one on the arm and the other on the base www.assignmentpoint.com

  24. Carry a Microscope Correctly www.assignmentpoint.com

  25. 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 (if it’s a mirror…don’t stand in front of it!) • Use fine adjustment to focus www.assignmentpoint.com

More Related