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Topic: Compound microscope

	Microscope - Wikipedia, the free encyclopedia
		Van Leeuwenhoek's microscopes consisted of a single, small, convex lens mounted on a plate with a mechanism to hold the material to be examined (the sample or specimen).
		Compound optical microscopes can magnify an image up to 1000× and are used to study thin specimens as they have a very limited depth of field.
		Anton van Leeuwenhoek (1632-1723) is generally credited with bringing the microscope to the attention of biologists, even though simple magnifying lenses were already being produced in the 1500's, and the magnifying principle of water-filled glass bowls had been described by the Romans (Seneca).
	en.wikipedia.org /wiki/Microscope (1240 words)

	Microscope -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-09-07)
		A microscope ((A native or inhabitant of Greece) Greek: micron = small and scopos = aim) is an instrument for viewing objects that are too small to be seen by the naked or unaided (The organ of sight) eye.
		Compound optical microscopes can magnify an image up to 1000× and are used to study thin specimens as they have a very limited (additional info and facts about depth of field) depth of field.
		The stereo microscope is often used to study the surfaces of solid specimens or to carry out close work such as sorting, dissection, (Surgery using operating microscopes and miniaturized precision instruments to perform intricate procedures on very small structures) microsurgery, watch-making, small circuit board manufacture or inspection, and the like.
	www.absoluteastronomy.com /encyclopedia/m/mi/microscope.htm (1445 words)

	APSnet Education Center - Lab Exercises in Plant Pathology - Basic Microscopy (Site not responding. Last check: 2007-09-07)
		Microscopes were developed during the late 17th century and continue to be important in identifying fungi and other causal agents of plant diseases.
		Compound microscopes are used for the observation of smaller specimens which are placed on microscope slides and topped with a cover slip.
		There are several differences between using a compound microscope and using a dissecting microscope (sometimes referred to as a stereo-microscope because it is like two microscopes set to focus on one point providing a 3-dimensional or stereoscopic view of the specimen).
	www.apsnet.org /education/LabExercises/Microscopes/top.html (3410 words)

	The compound light microscope
		The first microscopes were invented in 1590 by two Dutch spectacle makers, Zacharias and Francis Janssen, who combined two convex lenses in a tube to magnify objects.
		The inability of the human eye to see microscopic objects is a consequence of the arrangement of receptor cells at the rear of the eye.
		Microscopes which use two or more magnifying lenses are called compound because the lenses work in tandem to magnify the image which ultimately appears on the back of the eye.
	arnica.csustan.edu /boty1050/Lab/microscope.htm (1112 words)

	The Compound Light Microscope (Site not responding. Last check: 2007-09-07)
		Microscope is the combination of two words; "micro" meaning small and "scope" meaning view.
		The creation of the compound microscope by the Janssens helped to advance the field of microbiology light years ahead of where it had been only just a few years earlier.
		Simple light microscopes of the past could magnify an object to 266X as in the case of Leeuwenhoek's microscope.
	www.cas.muohio.edu /~mbi-ws/microscopes/compoundscope.html (178 words)

	A-Z Microscope
		Today, the term "microscope" is generally used to refer to this type of compound microscope.
		In the compound microscope, the lens closer to the object to be viewed is refers to as the "objective", while the lens closer to the eye is called the "eyepiece".
		Using a compound microscope that he had built himself, the 17th-century Englishman Robert Hooke discovered the fact that living things are composed of cells.
	www.az-microscope.on.ca /history.htm (500 words)

	The compound microscope (from microscope) -- Encyclopædia Britannica
		The compound microscope, using an objective and an eyepiece, was first described in the 16th century, but all drawings of the period indicate very impractical arrangements of lenses.
		Compounds of carbon are classified as organic except for carbides, carbonates, cyanides, and a few others.
		The compound microscope uses a lens called the objective to produce a primary magnified image and another called the eyepiece, or ocular, to magnify this image.
	www.britannica.com /eb/article-8958?tocId=8958 (816 words)

	Compound Microscope and Case (Getty Museum)
		This microscope was made for an aristocratic amateur scientist, who would have used it in his cabinet de curiosité to explore the mysteries of the natural world.
		The Getty Museum's microscope still works, and the case is fitted with a drawer filled with the necessary attachments such as tweezers, extra lenses, and slides of such items as geranium petals, hair, fly wings, and fleas.
		A microscope of this same model belonged to Louis XV, King of France, and was part of his observatory at the Château de La Muette.
	www.getty.edu /art/collections/objects/o6789.html (213 words)

	Light microscopy
		Other than the compound microscope, a simpler instrument for low magnification use may also be found in the laboratory.
		The stereo microscope, or dissecting microscope usually has a binocular eyepiece tube, a long working distance, and a range of magnifications typically from 5x to 35 or 40x.
		With a conventional bright field microscope, light from an incandescent source is aimed toward a lens beneath the stage called the condenser, through the specimen, through an objective lens, and to the eye through a second magnifying lens, the ocular or eyepiece.
	www.ruf.rice.edu /~bioslabs/methods/microscopy/microscopy.html (2057 words)

	AllRefer.com - microscope : Compound Microscopes : Computation of Magnifying Power (Technology: Terms And Concepts) - ...
		The compound microscope consists essentially of two or more double convex lenses fixed in the two extremities of a hollow cylinder.
		The lower lens (nearest to the object) is called the objective; the upper lens (nearest to the eye of the observer), the eyepiece.
		For example, if a lens magnifies an object 5 times, the magnification is said to be 5 diameters, commonly written simply "5x." The total magnification of a compound microscope is computed by multiplying the magnifying power of the objective by the magnifying power of the eyepiece.
	reference.allrefer.com /encyclopedia/M/microsco-compound-microscopes.html (296 words)

	A one Dollar Compound Microscope
		Microscopes may be thought of as very intricate and mysterious instruments but in reality, they are not as complicated as one may think.
		A microscope is essentially formed by two lenses: the objective and the eyepiece which is also referred to as the ocular.
		Usually, microscope condensers are provided with an iris diaphragm, where the aperture is continuously adjustable to fit the cone of light that is directed to the specimen according to the numerical aperture of the objective.
	www.funsci.com /fun3_en/ucomp1/ucomp1.htm (7494 words)

	Choosing a Microscope - Meiji Techno
		Stereo microscopes are typically used in work or study environments that require users to work with the specimen with their hands or with tools under the microscope.
		Compound microscopes like the one pictured here are what most people visualize when they think about microscopes.
		Typically the range of magnification on a compound microscope is between 40x and 1000x, although some are capable of higher or lower magnifications.
	www.meijitechno.com /choosing.htm (964 words)

	Light Microscopy and Photomicrography
		A compound microscope is made out of various mechanical and optical components.
		When light is generated by the lamp filament of a compound microscope using illumination with transmitted light, the light first passes through collector lenses and filters and then through the condenser, microscope slide, specimen, cover glass (if available), objective, and ocular.
		For instance, a microscope with excellent objectives and a great condenser performs rather poorly if the front focal plane of the condenser (location of the contrast iris diaphragm) is not "in focus" with the back focal plane of the objective.
	www.microscopy-uk.org.uk /mag/artjul03/gocompmic.html (2094 words)

	Building a Stereoscopic Microscope
		The main difference between these two types of microscope is that the compound microscope sees the sample from a single direction, whereas the stereoscopic type sees the object from two slightly different angles which provides the two images needed for the stereoscopic vision.
		Also, conventional compound microscopes are used to observe objects that are transparent or translucent and typically have a magnification ranging from 50 to 1,200 times.
		The construction of this microscope is beneficial from a educational point of view since it provides the young scientist an opportunity to learn some of the basic principles of optics, it also requires one to work out the mechanical details of the project, to obtain the necessary components and to assemble the microscope.
	www.funsci.com /fun3_en/uster/uster.htm (8596 words)

	The Compound Light Microscope and Stereoscopic (Dissecting) Microscope (Site not responding. Last check: 2007-09-07)
		The compound light microscope and the stereoscopic microscope are 2 instruments essential to the study of biology.
		These microscopes will be used in the lab to examine specimens that are too large or too thick to be viewed through the compound light microscope.
		Examine the letter "e" under the appropriate magnification and note that the image is not reversed as in the case of the compound light microscope.
	www.usd.edu /biol/labs/151/micro51.htm (3258 words)

	microscope -> Compound Microscopes on Encyclopedia.com 2002 (Site not responding. Last check: 2007-09-07)
		The compound microscope is widely used in bacteriology, biology, and medicine in the examination of such extremely minute objects as bacteria, other unicellular organisms, and plant and animal cells and tissue—fine optical microscopes are capable of resolving objects as small as 5000 Angstroms.
		The ultramicroscope is an apparatus consisting essentially of a compound microscope with an arrangement by which the material to be viewed is illuminated by a point of light placed at right angles to the plane of the objective and brought to a focus directly beneath it.
		The phase-contrast microscope, a modification of the compound microscope, makes transparent objects visible; it is used to study living cells.
	www.encyclopedia.com /html/section/microsco_compoundmicroscopes.asp (841 words)

	The First Compound Microscope: (Site not responding. Last check: 2007-09-07)
		Since a microscope could be made by just reversing a telescope, this may be where the idea originated.
		This is also very untrue, as while his microscopes were very simple and crude, he started making them long after very elaborate models were available and many important discoveries had been made by them.
		The microscope at the Middleburg museum was said to have a magnification of 3X when fully closed, and 9X when fully extended.
	www.sfusd.k12.ca.us /schwww/sch773/zimmerman/c2.html (632 words)

	Simple top lighting for the compound microscope
		The basic compound microscope that many amateurs like myself use is primarily designed for use with transmitted light.
		But if you don't have a stereo microscope, a compound microscope with low power objectives can also be used to good effect despite the lack of 3D and shallower depth of focus.
		Although top lighting with a compound microscope doesn't quite have the versatility of a stereo microscope it can still be used to good effect particularly at higher magnifications than your stereo' may be capable of.
	www.microscopy-uk.org.uk /mag/art98/incid1.html (1313 words)

	Using the Microscope (Site not responding. Last check: 2007-09-07)
		"Compound" just refers to the fact that there a two lenses magnifying the specimen at the same time, the ocular and one of the objective lenses.
		Be sure to center your specimen before switching to a higher power objective or it may disappear.
		The ratio of low to high power for this microscope is 10/40 or 1/4.
	www.borg.com /~lubehawk/mscope.htm (1771 words)

	Compound Microscope (Site not responding. Last check: 2007-09-07)
		A Zeiss Axioscop compound microscope is being prepared for use on the space station to provide 40 X to 1000 X magnification of specimens.
		The microscope supports differential interference contrast, phase contrast, fluorescence, bright field, and dark field microscopy of fresh, live, fixed, and/or stained samples.
		In order to ensure crew safety and contain potentially hazardous biological samples or stains, the microscope is being modified by Lockheed-Martin Engineering to function while completely enclosed within the life sciences glove box.
	spaceprojects.arc.nasa.gov /Space_Projects/SSBRP/compound_scope.html (147 words)

	Accelerated Biology- Compound Light Microscope (Site not responding. Last check: 2007-09-07)
		Microscopes are instruments that allow you to magnify an image of microscopic structures and organisms so that they can be studied in detail.
		Microscopes present an image to the viewer that is upside-down and backward from the original specimen.
		The resolution of a microscope is its ability to separate close objects.
	www.bethtfiloh.com /compoundmicroscope.htm (370 words)

	Microscope (Site not responding. Last check: 2007-09-07)
		In a working microscope, the length L in the sketch above is much longer than either of the lens focal lengths f
		A compound microscope uses a very short focal length objective lens to form a greatly enlarged image.
		This calculation is the standard form which is usually quoted for microscopes, but it is an approximation which may not be a good one under certain circumstances.
	hyperphysics.phy-astr.gsu.edu /hbase/geoopt/micros.html (155 words)

	BestScopes.com - Compound Microscope Accessories
		When attached on top of your existing microscope stage, this handy device will hold your slide firmly and allow you to move it precisely by means of two dials.
		All of BestScopes.com's compounds have room for this lens; however, it is best for our Observer and Revelation lines since they both have fine focus.
		This carry case is the perfect thing to protect your Observer Microscope.
	www.bestscopes.com /micro-acc.html (367 words)

	Microscopes - Compound Microscope Simple (Site not responding. Last check: 2007-09-07)
		In optics, this microscope is defined as simple, because.....it less effective than a simple microscope.
		A simple microscope, as opposed to a standard compound microscope (see below) with multiple lenses, is a microscope that uses only one lens for...
		A history of the microscope - starting with use of a simple lens in ancient times to the first compound microscope circa 1590 and including the...
	www.microscopeland.com /directory/compound-microscope-simple.html (231 words)

	- SHOP.COM (Site not responding. Last check: 2007-09-07)
		This elementary microscope fills the need for a sturdy instrument to study biology in school.
		It has coarse focusing with a slip-clutch to prevent damage to both the microscope and slides.
		All other designated trademarks, copyrights and brands are the property of their respective owners.
	www.shop.com /op/aprod-p20431984 (210 words)

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