Microscopes

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Microscopes
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The Compound Microscope

• A compound Microscope is the type of microscope
  that most people think of when they hear the word
  Microscope.
• It uses two lenses to focus the light that is
  passing through a sample.

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Magnification vs. Resolution

• Magnification
• Is how large an image can be made.

• Resolution
• Is how clear an image can be made.

4

• Robert Hooke made several improvements to the
  first compound microscopes.
• While he was looking at slices of cork under the
  microscope, he called the little rectangles
  Cells because it reminded him of the way cells
  in a prison are arranged.

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Anton van Leeuwenhoek  

• Leeuwenhoek was an amateur scientist who made his
  own lenses for his microscope.
• He looked at pond water and called many of the
  things he saw Animalcules.
• Animalcules means little animals.

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Parts of the Scope

• Eye piece
• The eye piece is what you observe items through.
• This eye piece magnifies objects by 10 times
  (10x)
• Body Tube
• Neck/Arm
• This is where one of your two hands holds the
  scope while you are moving it.

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Parts of the Scope

• Revolving nose piece
• Turns to allow you to change magnification.
• Stage Clip
• Holds microscope slides in place while being
  observed.
• Objectives
• The other lenses of a Compound Microscope
• 4x, 10x and 40x
• Total magnification eyepiece x objective.
• Current magnification 40x

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Parts of the Scope

• Stage Stop
• Keeps the stage from moving too high.
• Microscope slide
• Stage
• This is where the microscope slide is placed to
  observe specimen
• Course Adjustment Knob
• Used at first to bring a specimen into position.
• Must be used on low power only

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Parts of the Scope

• Diaphragm
• Has small holes in it to allow different amounts
  of light through to help view a specimen.
• Light Source
• Can be a mirror to reflect light or an electric
  light source.
• Fine Adjustment knob
• Used on medium and high power to bring the image
  of a specimen into focus.
• Light Switch
• Turn on/off power.
• When not in use, turn off
• Base
• Provides support for the microscope.

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• http//www.microscopy-uk.org.uk/mag/indexmag.html?
  http//www.microscopy-uk.org.uk/mag/wimsmall/sundr
  .html
• http//www.gpmatthews.nildram.co.uk/animalcules/