1. When using the optical microscope, everyone should pay attention to whether the overall installation of the microscope is loose. For example, if the optical microscope is used for a long time, it will cause problems such as the loose support frame and the loose installation of the objective lens. If it is too loose, it will jeopardize the practical effect of the inspection, and it is also very easy to damage the optical microscope.

2. Common problems of using the quasi-focus screw. In the whole process of operation, it is very easy for everyone to focus immediately under the high-power lens, or regardless of whether the lens barrel is raised or lowered, the eyes are always looking at the eyepiece, or it is not the critical point to control the object distance, and the object distance is adjusted to When it is 2 to 3 cm, it will go up, and the speed of rotating the focal spiral is fast. This kind of problem is very easy to cause the objective camera lens to feel bad for loading, damage the loading or the camera lens. Regarding the above practical operation problems, we would like to say that when you adjust the focal length of the lens, you must land on the low magnification lens, first rotate the coarse focus screw to slowly lower the lens barrel, and the objective lens is close to the cover glass, but pay attention Do not let the objective lens meet the cover glass. During the whole process, both eyes should look at the objective lens from the side, then look into the eyepiece with the right eye, and slowly adjust the coarse focus screw in the opposite direction, so that the lens barrel rises slowly until It is only necessary to see the virtual image. In addition, it is indicated to the students that the object distance of ordinary optical microscopes is around 1 cm. Therefore, if the object distance is far beyond 1 cm, but no virtual image is seen, it may be that the specimen was collected out of the field of view or rotated. If the speed of the coarse focus screw is too fast, then adjust the mounting position, and then repeat the process. When there is an ambiguous virtual image in the field of view, you need to use the fine focus screw adjustment. Reduce the search range and increase the speed of searching for virtual images.

3. The problem of light in optical microscopes. The light is a very important step when applying an optical microscope. Remember, you must use a low-power mirror to measure the light. When the light source is strong, use a small focal length and a flat mirror, and when the light source is poor, use a large aperture lens, a concave mirror, and rotate. The rearview mirror cannot be pulled out with one hand, but must be rotated with both hands, only when you see a well-proportioned and bright circular field of view. After the light is well aligned, do not move the optical microscope at will, in case the light source cannot accurately enter the Confucius through the light according to the rearview mirror.

4. The problem of objective lens transformation. After using a low magnification lens, switch to a high magnification lens. People usually like to push the objective lens immediately with their fingers. The fineness is high, and the uneven support of the external thread is very easy to loosen. Once the external thread is broken, all converters will be billed. Therefore, we recommend that everyone hold the lower rotating plate of the converter to change the objective lens.

5. The problem of using eyes with high magnification microscopes. When you use the high-power microscope object, you should open your eyes and look into the eyepiece with your right eye, that is, the right eye should be as close to the eyepiece as possible, and the right eye should try to look into the field of view, without covering the right eye forcefully or closing it decisively. Eye, it is not in line with the observation rules of the experiment, the right eye is often tired, and it is not guaranteed to draw while observing.