About the use of optical microscope: 1. Microscopy: 1 right hand holding mirror arm; 2 left hand holder; 3 placed on the chest. 2. Rotation of the microscope: 1 the lens barrel is facing forward, the mirror arm is facing backwards; 2 is placed on the table in front of the observer's seat, leaning to the left side of the body to facilitate the left eye to observe inside the eyepiece; 3 placed on the inside of the table, away from the table edge About 5cm. 3. Opposite light: 1 Rotate the coarse quasi-focus spiral to make the lens barrel rise slowly, then rotate the converter to align the low magnification objective lens with the light-passing hole; 2 Turn the shutter (or sheet-like aperture) with your finger to make the Zui large aperture Align the light through hole, and the left eye will look into the eyepiece while turning the mirror to face the light source to make the brightness in the field of view uniform. 4. Use of low magnification objective lens: 1 Turn the coarse eccentric spiral by hand to make the lens cylinder slowly descend, while the two eyes gaze at the objective lens from the side, and stop when the objective lens is separated from the slide of the stage by 2 to 3 mm. 2 Use the left eye to look into the eyepiece (note that the right eye should be squatting at the same time), and turn the coarse focus screw to make the lens tube rise slowly until you see the object. If it is not clear, you can adjust the fine focus spiral until it is clear. 5. Use of high magnification objective lens: Before using the high magnification objective lens, you must first find the observed object with a low magnification objective lens, and adjust it to the center of the field of view, then turn the converter and change the high magnification lens. After switching to a high power mirror, the brightness in the field of view becomes darker, so a larger aperture is generally used and the concave surface of the mirror is used, and then the fine focus spiral is adjusted. The number of objects viewed is reduced, but the volume becomes larger. 6. Use of Mirrors: Mirrors are often used in conjunction with a shutter (or aperture) to adjust the brightness in the field of view. The mirrors are flat and concave. For light, if the field of view is too strong, use the plane of the mirror. If the light is still too strong, use a smaller aperture. Conversely, if the light in the field is weak, use a larger aperture or use a mirror. Concave. 7. Wipe the lens: 1 Use special lens paper; 2When rubbing the lens, first fold the lens paper several times, then rub it in one direction, not rub it back or rub it; 3If the lens is contaminated by oil, then A few drops of xylene were dropped on the mirror paper and then wiped as described above. 8. Magnifying object of the microscope: it is the length and width of the object, not the area, not the volume. 9. The focal length of the microscope: the distance of the objective lens from the loading piece, the use of the quasi-focus spiral. 10. When the microscope is used, the moving direction of the object is opposite: that is, when the object is in the field of view, the loading piece moves in this direction. 11. Judgment of foreign matter when using the microscope: On the eyepiece, objective lens or loading sheet, it is usually judged by moving the slide (whether on the slide) or by rotating the converter (whether on the objective lens) and remaining on the eyepiece. 12. Placement of the microscope after the experiment: After the microscope is used, the slide should be scared, and the mechanical part should be wiped clean with white gauze; turn the converter so that the two objective lenses are on both sides; turn the coarse focus screw to make the mirror The tube descends to the low point of zui, the mirror is erected, covered with red silk, and the microscope is locked into the box. 

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