Celestron Advanced Stereo Microscope Microscope Basics - Page 8

Other Types of Microscopes

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Stereo Microscope There are two separate light paths (as opposed to a single light path in a compound microscope) which produce a true stereo, three dimensional (3-D) image of the specimen or object. Within the objective lens you will find two lenses (one for each path of light) side-by-side. The optical design parameters of a stereo microscope limit its 3-D effects to low powers only. Also in the category of low power microscopes is the single light path (like a compound microscope) type usually referred to as a dissecting microscope. This type is more economical than the stereo type but is very useful for examining large sized specimens and objects. In the standard form the lenses consist of objective lenses (closest to the object or specimen) and eyepiece lenses (closest to the observers' eyes) and a means of adjusting the focus (rack and pinion style) and position of the object or specimen. In addition, a stereo microscope uses light (from desk or table lamps, indirect sunlight, other interior light sources, or from built-in or attached lamps) to illuminate the specimen or object so that you can see it with your eyes. The images you see are correct (upright and normal which is the opposite of compound microscopes). Most stereo microscopes have both top and bottom built-in or attached illumination to handle various objects and specimens of all varieties, shapes, and colors. Other Types of Microscopes These are usually advanced and expensive type microscopes made for specific usages mainly in advanced medical and research. There are many, many types but some of the more popular types are listed below. Phase Contrast -- This is a microscope that uses the differences in the phase of light transmitted or reflected by a specimen to form distinct, contrasting images of different parts of the specimen. Polarizing - A microscope in which the object viewed is illuminated by polarized light for typically analyzing the content and make-up of organic or inorganic material like crystals, chemical microscopy, and optical mineralogy. 8

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8
Stereo Microscope
There are two separate light paths (as opposed to a single light path in a compound microscope) which produce a true
stereo, three dimensional (3-D) image of the specimen or object.
Within the objective lens you will find two lenses (one for
each path of light) side-by-side.
The optical design parameters of a stereo microscope limit its 3-D effects to low powers
only.
Also in the category of low power microscopes is the single light path (like a compound microscope) type usually referred
to as a dissecting microscope.
This type is more economical than the stereo type but is very useful for examining large
sized specimens and objects.
In the standard form the lenses consist of objective lenses (closest to the object or specimen) and eyepiece lenses (closest to
the observers’ eyes) and a means of adjusting the focus (rack and pinion style) and position of the object or specimen.
In
addition, a stereo microscope uses light (from desk or table lamps, indirect sunlight, other interior light sources, or from
built-in or attached lamps) to illuminate the specimen or object so that you can see it with your eyes.
The images you see are correct (upright and normal which is the opposite of compound microscopes).
Most stereo
microscopes have both top and bottom built-in or attached illumination to handle various objects and specimens of all
varieties, shapes, and colors.
Other Types of Microscopes
These are usually advanced and expensive type microscopes made for specific usages mainly in advanced medical and research.
There
are many, many types but some of the more popular types are listed below.
Phase Contrast
--
This is a microscope that uses the differences in the phase of light transmitted or reflected by a specimen to form
distinct, contrasting images of different parts of the specimen.
Polarizing –
A microscope in which the object viewed is illuminated by polarized light for typically analyzing the content and make-up
of organic or inorganic material like crystals, chemical microscopy, and optical mineralogy.