The Fascinating World of Microscopes: From Ancient Origins to Modern Mechanisms

 
The Microscope
 
Mr. Ryan
6
th
 Grade
 
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Was the microscope originally made by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.
 
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
 
 
Anthony van Leeuwenhoek
1632-1723
 
Robert Hooke
1635-1703
 
Hooke Microscope
 
The History
 
Zacharias Jansen
1588-1631
 
The “First” Microscope
 
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.
 
How a Microscope Works
 
O
c
u
l
a
r
 
L
e
n
s
(Magnifies Image)
 
O
b
j
e
c
t
i
v
e
 
L
e
n
s
(Gathers Light,
 Magnifies
 And Focuses Image
 Inside Body Tube)
 
B
o
d
y
 
T
u
b
e
(Image Focuses)
 
B
e
n
d
i
n
g
 
L
i
g
h
t
:
 
T
h
e
 
o
b
j
e
c
t
i
v
e
 
(
b
o
t
t
o
m
)
 
c
o
n
v
e
x
 
l
e
n
s
m
a
g
n
i
f
i
e
s
 
a
n
d
 
f
o
c
u
s
e
s
 
(
b
e
n
d
s
)
 
t
h
e
 
i
m
a
g
e
 
i
n
s
i
d
e
 
t
h
e
b
o
d
y
 
t
u
b
e
 
a
n
d
 
t
h
e
 
o
c
u
l
a
r
 
c
o
n
v
e
x
 
(
t
o
p
)
 
l
e
n
s
 
o
f
 
a
m
i
c
r
o
s
c
o
p
e
 
m
a
g
n
i
f
i
e
s
 
i
t
 
(
a
g
a
i
n
)
.
 
The Parts of a Microscope
 
Body Tube
 
Nose Piece
 
Objective
Lenses
 
Stage
 Clips
 
Diaphragm
 
Light Source
 
Ocular Lens
 
Arm
 
Stage
 
Coarse Adj
.
 
Fine Adjustment
 
Base
 
Skip to Magnification Section
 
Body Tube
 
The body tube holds the objective
lenses and the ocular lens at the proper
distance
 
Diagram
 
Nose Piece
 
The Nose Piece holds the objective
lenses and can be turned to increase
the magnification
 
Diagram
 
Objective Lenses
 
The Objective Lenses increase
magnification (usually from 10x to 40x)
 
Diagram
 
Stage Clips
 
These 2 clips hold the slide/specimen in
place on the stage.
 
Diagram
 
Diaphragm
 
The Diaphragm controls the amount of
light on the slide/specimen
 
Turn to let more light in or to
make dimmer.
 
Diagram
 
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
 
Ocular Lens/Eyepiece
 
Magnifies the specimen image
 
Diagram
 
Arm
 
Used to support the microscope when
carried.  Holds the body tube, nose
piece and objective lenses
 
Diagram
 
Stage
 
Supports the slide/specimen
 
Diagram
 
Coarse Adjustment Knob
 
Moves the stage up and down (quickly)
for focusing your image
 
Diagram
 
Fine Adjustment Knob
 
This knob moves the stage SLIGHTLY
to sharpen the image
 
Diagram
 
Base
 
Supports the microscope
 
Diagram
 
Magnification
 
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”
 
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
 
Carry a Microscope Correctly
 
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
 
References
 
http://www.cerebromente.org.br/n17/history/neurons1_i.htm
Google Images
http://science.howstuffworks.com/light-microscope1.htm
 
 
This powerpoint was kindly donated to
www.worldofteaching.com
 
 
 
 
http://www.worldofteaching.com
 is home to over a
thousand powerpoints submitted by teachers. This is a
completely free site and requires no registration. Please
visit and I hope it will help in your teaching.
Slide Note
Embed
Share

Delve into the intriguing history of microscopes, from ancient experimentation to the innovative creations of individuals like Zacharias Janssen, Anthony van Leeuwenhoek, and Robert Hooke. Explore how these optical instruments work, utilizing convex lenses to bend and focus light for magnification. Discover the essential parts of a microscope and how they come together to enhance our ability to observe the microscopic world.

  • Microscopes
  • History
  • Optics
  • Magnification
  • Instruments

Uploaded on Oct 05, 2024 | 0 Views


Download Presentation

Please find below an Image/Link to download the presentation.

The content on the website is provided AS IS for your information and personal use only. It may not be sold, licensed, or shared on other websites without obtaining consent from the author. Download presentation by click this link. If you encounter any issues during the download, it is possible that the publisher has removed the file from their server.

E N D

Presentation Transcript


  1. The Microscope Mr. Ryan 6thGrade

  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.

  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

  4. The History The First Microscope Zacharias Jansen 1588-1631

  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.

  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).

  7. The Parts of a Microscope

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

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

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

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

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

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

  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

  15. Ocular Lens/Eyepiece Magnifies the specimen image Diagram

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

  17. Stage Supports the slide/specimen Diagram

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

  19. Fine Adjustment Knob This knob moves the stage SLIGHTLY to sharpen the image Diagram

  20. Base Supports the microscope Diagram

  21. Magnification

  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

  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

  24. Carry a Microscope Correctly

  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

  26. References http://www.cerebromente.org.br/n17/history/neurons1_i.htm Google Images http://science.howstuffworks.com/light-microscope1.htm

  27. This powerpoint was kindly donated to www.worldofteaching.com http://www.worldofteaching.com is home to over a thousand powerpoints submitted by teachers. This is a completely free site and requires no registration. Please visit and I hope it will help in your teaching.

More Related Content

giItT1WQy@!-/#giItT1WQy@!-/#