A microscope is an optical instrument that is used to view objects that are invisible to the naked eye. Microscopes use a combination of lenses to magnify the images of very small objects. The first microscop The art of grinding glasses and making spectacles was known to people since the 14th century. The first microscope was made by Hans
and zacharias janssen of the Netherlands in 1590. Hans and Zacharias Janssen were lens
makers. They made a microscop by placing two lenses in a tube.
Microscopy is the science of small objects using a microscope. The three branches of microscopy are optical microscopy, electron microscopy, and scanning probe microscopy examining microscopy, and scanhing probe microscopy
Charles A. Spencer
Charles A. Spencer was America’s first microscop manufacturer. Spencer published his first catalogue in 1838. He began operating as C. A. Spencer and Sons in 1865. The
company was incorporated in 1895 and named Spencer Lens Company. It was the only microscop manufacturing firm in America for a long time.
The first microscops were known as flea glasses’as they were used to view fleas or
tiny creeping things. These microscops were simple tubes with a plate and a lens at the
ends. They magnified the image to more than 10 times the actual size.
Robert Hooke was a British scientist. He lived in London in the 17th century. He studied various objects with his microscop. He published his results in his book Micrographia. He was the first person Robert Hooke to examine fossils with a microscope. He observed the similarities between fossils of various objects and their living counterparts.
The electron microscope was designed by Ernst Ruska in 1931. Ruska was a German engineer. Electron microscopes allowed scientists to view very small things that could not be seen with a light microscope. Ernst Ruska was awarded the Nobel Prize in physics in 1986 for his fundamental work in electron optics and for his design of the first electron microscope. Electron microscopes use electrons instead of white light to magnify images. Beams of speeding electrons are focused on the sample. These beams are then absorbed by the sample, which then forms the image on an electron-sensitive photographic plate.
Anton van Leeuwenhoek
Anton van Leeuwenhoek is known as the father of microscopy. He was the first person to
lls and bacteria seen through his very small microscop. His Element was a simple
device that used only one lens. The body was made of a brass plare. The lens was mounted
in a tiny hole in the plate. Lecuwenhoek mounted the specimen on a sharp point in front
of the lens. The microscop was 8-10 cm long Leeuwenhoek’s microscops loo
the modern day magnifying lenses. Lecuwenhock made several pioneering studies of
microscopic objects during his lifetime. He made over 500
A compound microscop forms a greatly enlarged image. I
uses an objective lens with a short focal length to form an
image. The focal length of the eyepiece used is also short. The
compound in its simplest form was used by Robert
Hooke. It had three lense
s-one on the nose piece near the
ect, another at the top of the barrel that acted as an cyepiece,and a third field lens inside the barrel close to the objective
Hooke illustrated his compound in his book,Micrographia, in 1665.