Animal Husbandry
The Microscope
FEDERICO G. PINEDA M. Sc.
Associate Professor III Department of Biological Sciences, College of Arts and Sciences Central Luzon State University, Science city of Muñoz, Nueva Ecija
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• Was the microscope originally made by accident?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
Zacharias Jansen 1588-1631
The “First” Microscope
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
Hooke Microscope
Robert Hooke 1635-1703
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
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).
The Parts of a Microscope
Ocular Lens Draw Tube
Nose Piece Arm LPO HPO Stage Clips Iris Diaphragm Light Source Base Stage Coarse Adj. Fine Adjustment
Body Tube
• The body tube connects and 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 change the objective in place to increase/ decrease the magnification
Diagram
Ocular Lens/Eyepiece
• Gives final magnification of the specimen image • Supported by the draw tube
Diagram
Objective Lenses
• The Objective Lenses (Scanner,LPO,HPO,OIO) increase
FEDERICO G. PINEDA M. Sc.
Associate Professor III Department of Biological Sciences, College of Arts and Sciences Central Luzon State University, Science city of Muñoz, Nueva Ecija
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• Was the microscope originally made by accident?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
Zacharias Jansen 1588-1631
The “First” Microscope
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
Hooke Microscope
Robert Hooke 1635-1703
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
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).
The Parts of a Microscope
Ocular Lens Draw Tube
Nose Piece Arm LPO HPO Stage Clips Iris Diaphragm Light Source Base Stage Coarse Adj. Fine Adjustment
Body Tube
• The body tube connects and 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 change the objective in place to increase/ decrease the magnification
Diagram
Ocular Lens/Eyepiece
• Gives final magnification of the specimen image • Supported by the draw tube
Diagram
Objective Lenses
• The Objective Lenses (Scanner,LPO,HPO,OIO) increase
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.