The use of microscopes

When using natural light sources for mirror inspection, it is best to use a light source facing north and not direct sunlight; When using artificial light sources, it is advisable to use the light source of a fluorescent lamp.
During the microscopic examination, the body should be facing the internship platform in an upright posture, with both eyes naturally open. The left eye should observe the specimen, while the right eye should observe, record and draw. At the same time, the left hand should adjust the focus to make the object clear and move the specimen's field of view. Record and draw with the right hand.
During microscopic examination, the stage should not be tilted because when the stage is tilted, liquid or oil can easily flow out, damaging the specimen, contaminating the stage, and affecting the examination results.
During microscopic examination, the specimen should be moved in a certain direction until the entire specimen is observed, so as not to miss or repeat the examination.
The heavy light of a microscope is focused on the light, the conversion of the objective lens, and the adjustment of the light. When observing parasitic specimens, light regulation is crucial. Because the observed specimens, such as insect eggs, cysts, etc., are all objects in natural light state, ranging in size, color, depth, and light, some are colorless and transparent, while low and high magnification lenses have more transitions. Therefore, it is necessary to adjust the focal length and light at any time according to different specimens and requirements during microscopic examination, so as to make the observed object clear. In general, stained specimens should have strong light, while colorless or unstained specimens should have weak light; The light should be weak when observing with a low magnification lens, and strong when observing with a high magnification lens.