A microscope is an instrument used for seeing small objects that are too small to see with the naked eyes. The most common microscope we see is the light microscope. We can see this type almost anywhere where there is a laboratory. There are two types of this kind, the single lens or more commonly known as the optical lens and the compound. The single lens uses a system of lenses to magnify objects and uses light. Compound microscope uses multiple lenses to collect light from the specimen and a different set of lens to direct light to the eye piece or camera. These two are the most common type. The optical microscope is the oldest design of all. There are also other kinds of microscopes.
An electron microscope magnifies an object electronically. It does by using a beam of electrons to light the object and focus it to form an image. It has a greater magnifying power than the optical one and can magnify objects up to two million times. It is used in observing biological and inorganic specimens including microorganisms and metals. When used in industry, it is used for quality control and analysis of semiconductors.
A scanning probe microscope produces and image by scanning the surface of the specimen using a scanning probe. The probe scans the specimen in a rectangular manner and then records the image. This type can see and magnify objects up to the atomic level. It can do this because of its use of the piezoelectric actuators.
Fluorescence microscope is used in life sciences. In this kind, the excitatory light is passed from above through the objective lens first then to the object rather than from the object first. The specimen is first applied with fluorescent and the emitted is then focused to the objective lens.
No comments:
Post a Comment