The microscope is an instrument used in science for making smaller objects look bigger. Optical microscope was developed first and made in the 1950's in Middleburg, Netherlands. It was then credited by two eyeglass makers who are Hans Lippershey and Hans Janssen. The name microscope was then given by Giovanni Faber in 1625. Magnifying object is the main ideal for using a microscope. The total magnification of the lens would be 10x more. Resolution of the image is important because it will give you a full view on what the object matter is. There are several varieties of a microscope depending on the usage for each object.
Optical
It is known to be the first invention and the most common o all types of microscopes. This is made with two materials separately, which is plastic or mirror-type. The refractive glass focuses a light into the eye and or another light detector wherein a mirror-type microscope also did the same. A technique called Sarfus is done to boost up the visibility of nanometre films. Another factor is the ultraviolet light who gives an eye detail to an image given by the object. The phase contrast microscopy is a technique used for a light through a translucent specimen and changed the contrast in the image. Now digital microscopes have been used as an upgrade version for the optical microscopes.
Electron
The electron microscope was invented in the year 1940. It consists of an insulator, electron gun, binocular viewer, a photo plate, and control panel. The shape of a cylindrical tube about two meters long. In contrast to the light microscope, the electron microscope visualizes objects using a thin of rapidly moving electrons that interfere with the specimen placed in the tube. The electrons are emitted by the cathode at the top of the tube and then accelerate by the anode. They then pass through a small aperture which forms them into a beam and into the vacuum inside the tube. Because different regions of the specimen are variously transparent to electrons, different amounts of electrons with changed energy passed through these regions. At the end of the tube, the electrons are collected on fluorescent or photographic film or on the screen that generates an image of the specimen. The beam that reaches the film consists of the different amounts of electrons that pass through a particular region of the specimen. This difference is responsible for the contrast in the film. The original image produced by the electron microscope is always black and white. And it is impossible to see directly with the eye.
If you need a Dino microscope for your science class or perhaps a handheld magnifying glass for your personal use. You can now get these stuff with ease, by shopping online!
Article Source: http://EzineArticles.com/?expert=Greg_Pierce
Optical
It is known to be the first invention and the most common o all types of microscopes. This is made with two materials separately, which is plastic or mirror-type. The refractive glass focuses a light into the eye and or another light detector wherein a mirror-type microscope also did the same. A technique called Sarfus is done to boost up the visibility of nanometre films. Another factor is the ultraviolet light who gives an eye detail to an image given by the object. The phase contrast microscopy is a technique used for a light through a translucent specimen and changed the contrast in the image. Now digital microscopes have been used as an upgrade version for the optical microscopes.
Electron
The electron microscope was invented in the year 1940. It consists of an insulator, electron gun, binocular viewer, a photo plate, and control panel. The shape of a cylindrical tube about two meters long. In contrast to the light microscope, the electron microscope visualizes objects using a thin of rapidly moving electrons that interfere with the specimen placed in the tube. The electrons are emitted by the cathode at the top of the tube and then accelerate by the anode. They then pass through a small aperture which forms them into a beam and into the vacuum inside the tube. Because different regions of the specimen are variously transparent to electrons, different amounts of electrons with changed energy passed through these regions. At the end of the tube, the electrons are collected on fluorescent or photographic film or on the screen that generates an image of the specimen. The beam that reaches the film consists of the different amounts of electrons that pass through a particular region of the specimen. This difference is responsible for the contrast in the film. The original image produced by the electron microscope is always black and white. And it is impossible to see directly with the eye.
If you need a Dino microscope for your science class or perhaps a handheld magnifying glass for your personal use. You can now get these stuff with ease, by shopping online!
Article Source: http://EzineArticles.com/?expert=Greg_Pierce
July 31, 2012 at 3:13 AM
Appealing information you have provided. It gained me more knowledge and idea on different types of microscopes. Please keep up the good because i like the way you are writing. Thanks!
stereo microscopes