How does the microscope make the object image clearer
Microscopes have been widely used in modern science.
The types of microscopes are divided into optical microscopes and electron microscopes according to the broad category.
Optical microscopes can be divided into transmission type and reflection type according to the difference of optical path form;
Electron microscopes can be divided into transmission type and electronic scanning type. The difference from optical microscopes is that the resolution is greatly enhanced. However, samples are generally required to be placed in a vacuum chamber, and some samples are not suitable.
Here we take the common reflective optical microscope as an example to illustrate the adjustment imaging method, and the principle of the transmissive optical microscope is the same.
The optical microscope mainly uses the objective lens group and the eyepiece lens to form an image, and the objective lens and the eyepiece lens are usually equipped with lens groups with different magnifications. Through combination, a very large magnification range can be formed. This configuration is because although the details of the high-magnification lens group are clearly displayed, the field of view and depth of field are narrow, and it is not convenient to move in different target areas. Although the magnification of the low-power lens group is small, the field of view and depth of field are large, which is convenient for searching targets in a wide range. In addition, some specific samples do not require a large magnification, but all objects in the field of view are required to be as clear as possible, so the low-magnification lens group is also useful. The combination of the two can obtain perfect clear imaging.
