Celestron Advanced Stereo Microscope Microscope Basics - Page 7

Stereo Microscope

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Compound Microscope Compound refers to the fact that in order to enlarge an image, a single light path passes through a series of lenses in a line where each lens magnifies the image over the previous one. In other words, one light path with multiple lenses equals a compound microscope. The image is seen by the observer as if it were only 10" (250mm) from your eye. In the standard form the lenses consist of an objective lens (closest to the object or specimen) and an eyepiece lens (closest to the observers' eye) and a means of adjusting the focus and position of the specimen or object. In addition, a compound microscope uses light (reflected from a mirror, from indirect sunlight, from desk lamps or other interior light sources, or from built-in lamps) to illuminate the specimen or object so that you can see it with your eye. The objective lens usually consists of three or four lenses (sometimes even five) on a rotating nosepiece (turret) so that the power can be changed. The image produced at the eye is two dimensional (2-D) and usually reversed and upside down. The most used light method is trans-illumination (light projected from below to pass through the specimen). At 400x much detail can be seen at the cellular level of biological specimens. Learning about cells and microorganisms is both educational and important for medical and science applications. Stereo Microscope Stereo microscopes are the second most common type of microscope. They can also be referred to as dissecting, dissection, or inspection microscopes. The stereo microscope is what many refer to as a low power microscope. Magnification (power) can have a range from about 10x to 80x with magnification in the 10x to 40x the most popular. Also, zoom models from about 10x to 60x or so are very convenient. Low power is used for examining larger sized items like insect parts, plant and flower parts, rocks and fossils, stamps, coins, PC boards, material surfaces, hair, etc. However, specimen slides can also be observed albeit at these lower powers. 7

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Compound Microscope
Compound refers to the fact that in order to enlarge an image, a single light path passes through a series of lenses in a line
where each lens magnifies the image over the previous one.
In other words, one light path with multiple lenses equals a
compound microscope.
The image is seen by the observer as if it were only 10” (250mm) from your eye.
In the standard form the lenses consist of an objective lens (closest to the object or specimen) and an eyepiece lens (closest
to the observers’ eye) and a means of adjusting the focus and position of the specimen or object.
In addition, a compound
microscope uses light (reflected from a mirror, from indirect sunlight, from desk lamps or other interior light sources, or
from built-in lamps) to illuminate the specimen or object so that you can see it with your eye.
The objective lens usually consists of three or four lenses (sometimes even five) on a rotating nosepiece (turret) so that the
power can be changed.
The image produced at the eye is two dimensional (2-D) and usually reversed and upside down.
The most used light method is trans-illumination (light projected from below to pass through the specimen).
At 400x much detail can be seen at the cellular level of biological specimens.
Learning about cells and microorganisms is
both educational and important for medical and science applications.
Stereo Microscope
Stereo microscopes are the second most common type of microscope.
They can also be referred to as dissecting, dissection,
or inspection microscopes.
The stereo microscope is what many refer to as a low power microscope.
Magnification (power) can have a range from
about 10x to 80x with magnification in the 10x to 40x the most popular.
Also, zoom models from about 10x to 60x or so
are very convenient.
Low power is used for examining larger sized items like insect parts, plant and flower parts, rocks and fossils, stamps,
coins, PC boards, material surfaces, hair, etc.
However, specimen slides can also be observed albeit at these lower powers.