1. The Microscope

2. The First Light Microscopes
Around 1590 Zaccharias and Hans Janssen experimented with lenses in a tube, leading to the forerunner of the microscope and the telescope
In the late 1600’s, Anton van Leeuwenhoek was the first to see bacteria, yeast, and many other microbes using a microscope

3. the Microscope and Their Function
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Parts of
the Microscope and Their Function
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4. #1 Body Tube – Reflects light up to the viewers eye
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5. #2 Revolving Nosepiece (Turret) – Allows for quick change of objectives/power
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6. # 3 Low Power Objective – The shortest lens and the first you use
# 3 Low Power Objective – The shortest lens and the first you use. Usually 4 X
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7. #4 Medium Power Objective – The second lens you use when doing proper microscope work. Usually 10 X
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8. #5 High Power Objective –
The longest lens and the highest magnification used. Usually 40 X.
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9. #6 Stage Clips – Use to keep the slide in place.
Slide- flat glass or plastic rectangle plate that the specimen is placed on
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10. #7 Diaphragm – Use to vary the amount of light passing through the slide. Usually it is better if the amount of light is low.
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11. #8 Light Source/mirror – Sends light up through the diaphragm and through the slide for viewing
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12. #9 Eye Piece—The part you look at with your eye
#9 Eye Piece—The part you look at with your eye. Usually 10 X magnification.
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13. #10 Arm – Used to safely transport microscope
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14. #11 Stage – Slides are placed on this
#11 Stage – Slides are placed on this. Can move it left and right and up and down
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15. #12 Coarse Adjustment – Used to make large changes in focus
#12 Coarse Adjustment – Used to make large changes in focus. NOTE Never use this when viewing on high power
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16. #13 Fine Adjustment – Used to make small adjustments of focus.
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17. #14 Base – Used to safely transport the microscope
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18. Parts of the Microscope
Eyepiece
Body Tube
Revolving Nosepiece
Arm
Objective Lens
Stage
Stage Clips
Coarse Focus
Diaphragm
Fine Focus
Light
Base

19. _________ ___ Always carry with 2 hands
_________ ___
Always carry with 2 hands
Only use lens paper for cleaning
Do not force knobs
Always store covered
Keep objects clear of desk and cords

20. ____ ___ _________ Place the Slide on the Microscope Use Stage Clips
____ ___ _________
Place the Slide on the Microscope
Use Stage Clips
Click Nosepiece to the lowest (shortest) setting
Look into the Eyepiece
Use the Coarse Focus

21. ____ ___ ____ Follow steps to focus using low power
____ ___ ____
Follow steps to focus using low power
Click the nosepiece to the longest objective
Do NOT use the Coarse Focusing Knob
Use the Fine Focus Knob to bring the slide into focus
To find total magnification: Multiply the eyepiece magnification by the objective lens magnification