Using a microscope, we are entering into a different world, a world of microorganisms.
Microscope is an instrument that gives the enlarged pictures of close subjects, which would not be able to observe with the naked eye. The microscope allows the subject to observe under the wide vision angle as to the maximum, and the eye induces one to come nearer to his picture at the same time remain sharp and clear.
Objective in modern microscopes consist of multiple small lens focal length, which act as a unique convex lens. In order to obtain a clearer picture, in such systems are corrected lens errors (chromatic and spherical aberration.
Objective creates enlarged the picture. Which enlarges it again, so that the final product is obtained trough of the magnification.
Contemporary optical microscopes can magnify lens with a picture of the object up to 2000 times. Besides the ability to magnify, is an important feature of the microscope, his power of discernment. This is the minimum distance at which two adjacent elements in a structure which could still see the separately and depends on the so-called the numeric Aperture Lenses and about the length of the wave of light that is used for lighting.
Application of microscopes in different branches of science and techniques has led to construction of more special types of instruments.
Unlike optical microscopes, electron microscope instead of electromagnetic radiation used by bundles of electrons and instead of the optic lens electric and magnetic fields, the method with a microscope by tunneling at the level of the atoms they observe the surface of the metal and other electrically conductive materials. Many types of microscopes are equipped with special devices for recording. For more info click on microscope objectives.