What are the main differences between light microscope and electron microscope
Optical microscope and electron microscope are two different kinds of microscopes, which are different in definition, classification and composition.
1. Different definitions
Optical microscope (English Optical Microscope, abbreviated as OM) is an optical instrument that uses optical principles to magnify and image tiny objects that cannot be distinguished by the human eye, so that people can extract microstructure information.
The application of electron microscope technology is based on the optical microscope. The resolution of the optical microscope is 0.2μm, and the resolution of the transmission electron microscope is 0.2nm. That is to say, the transmission electron microscope is magnified by 1000 on the basis of the optical microscope. times.
2. Different categories
There are many classification methods for optical microscopes. According to the number of eyepieces used, they can be divided into trinocular, binocular and monocular microscopes; according to whether the image has a stereoscopic effect, they can be divided into stereoscopic vision and non-stereoscopic vision microscopes; according to the object of observation, they can be divided into Biological and metallographic microscopes, etc.; according to the optical principle, it can be divided into polarized light, phase contrast and differential interference contrast microscopes, etc.
Electron microscopes can be divided into transmission electron microscopes, scanning electron microscopes, reflection electron microscopes, and emission electron microscopes according to their structures and uses.
