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Compound
Microscopes
Hans Lippershey and his son, Zaccharias Hanssen were
experimenting with a variety of lenses. In the late 1590’s, they
used many lenses in a tube and were amazed to see that the
object at the end of the tube was magnified well beyond
that of a magnifying glass. Little did they know, they had just
invented the compound microscope.
A Compound Microscope can be used for a number of
different things, from finding medical miracles to a day at the
park.
Compound Microscope consists of an eyepiece which is
usually 10x magnified followed by 10x, 40x and 100x objective
lenses. A light then passes through the object to the objective
lens, making an enlarged image of the object allowing you
to see what the naked eye alone can’t.
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Dissecting
Microscope
Philip O. Gravelle, a chemist, developed the
Dissecting Microscope to compare bullets for
identification in forensic science. It's history dates
back to the 1920s.
A Dissecting Microscope is a pair of microscopes
placed next to each other, the optical paths of
each microscope are connected together by the
optical bridge, this helps the forensic examiners to
simultaneously compare two things.
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Transmission
Electron
Microscopes
The first TEM was built by Max Knoll and Ernst Ruska
in 1931.
TEM forms a major method in a range of scientific
fields, in both physical and biological sciences.
TEMs find most use in cancer research, virology,
materials science as well as pollution and
semiconductor research.
A TEM
image of
the polio
virus.
More on
Scanning
Electron
Microscopes
Charles Oatley in 1952 created the Scanning
Electron Microscope, but Max Knoll created the
first prototype of the SEM in 1935.
SEM is a type of electron microscope that images
the objects surface by scanning it with a highenergy beam of electrons.
pollen grains
taken on an SEM
Information/Images for Compound Microscopes:
http://www.labessentials.com/Microscopes_Compound_Basics.htm
http://leavingbio.net/Cell%20Structure_files/Cell%20Structure_files/image002
.jpg
Information/images for Dissecting Microscope
http://dissectingmicroscopes.biz/dissecting-microscopes/the-dissectingmicroscope-and-forensics/
http://www.clt.astate.edu/mhuss/stereoparts.jpg
Information/Images for Transmission Electron Microscope
http://www.udel.edu/biology/Wags/histopage/illuspage/lec1/iintro9.gif
http://en.wikipedia.org/wiki/Transmission_electron_microscope
Information/Images for Scanning Electron Microscope
http://en.wikipedia.org/wiki/Scanning_Electron_Microscope
http://www.purdue.edu/REM/rs/graphics/sem2.gif