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microscopes - These are the simplest most widely used type...

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History Microscopes have been used for almost 1200 years with Abbas Ibn Firnas 's corrective lenses, and it was Ibn al-Haytham 's Book of Optics written between 1011 and 1020 that laid the foundation for optical research on the magnifying glass . The first true microscope was made around 1595 in Middelburg , The Netherlands . Three different eyeglass makers have been given credit for the invention: Hans Lippershey ; Sacharias Jansen ; and his son, Zacharias . Types optical theory microscopes (Light microscope): Optical microscopes are microscopes which function through the optical theory of lenses in order to magnify the image generated by the passage of a wave through the sample, or reflected by the sample. electron microscopes : Almost the same but the waves also use electromagnetic. scanning probe microscopes : It is based on the same principles of the first two but it also uses electron beams. Optical microscopes Optical microscopes
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Unformatted text preview: : These are the simplest most widely used type of microscope. They typically use refractive glass and occasionally of plastic or quartz , to focus light into the eye or another light detector. And other important type of microscope which is included in this category is the Digital microscope appeared a few years ago, using optics and a charge-coupled device (CCD) camera to output a digital image to a monitor. Electron microscopes Three major variants of electron microscopes exist: • Scanning electron microscope ( SEM ): looks at the surface of bulk objects. (it scans the surface with electron beams). • Transmission electron microscope ( TEM ): This is a scientific device that allows people to see objects that could normally not be seen by the naked or unaided eye. • Scanning Tunneling Microscope ( STM ): is a powerful technique for viewing surfaces at the atomic level....
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