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.

1. Required materials and tools:

Objective lens group: such as 100x, 200x, 300x, 600x, etc.

Eyepiece group: such as 5x, 10x, 15x, 20x, etc.

2. Step method:

Replace the appropriate high-magnification objective lens and eyepiece, and focus carefully by fine-tuning the handwheel

2. Matters needing attention:
Focusing skills: When fine-tuning the focus, there must be a blur-clear-re-blur process, the purpose is to confirm the most accurate focus point found, so you need to go a little bit, and then return to the clear focus position.