How to better maintain biological microscopes
1. The biological microscope should be placed in a dry and clean room to avoid moldy optical parts, rusty metal parts and dust accumulation. After using the microscope, put it back into the box (cabinet), or cover it with a glass cover or plastic cover, and put in a dry operating agent.
2. Do not disassemble the components by yourself; the lens tube must be inserted into the eyepiece or the eyepiece cover to prevent dust from entering from the upper part of the lens tube; do not touch or wipe the surface of the lens with your fingers. If there is dust, first use a soft brush to gently remove it. Gently brush it off, and then wipe it with a soft clean cloth. You can also use lens cleaning paper dipped in a little xylene or petroleum to try to wipe it, but be careful not to draw streaks on the lens surface. If there is mild mildew on the lens and it cannot be wiped off with a wiping paper, you can use a cotton swab dipped in a mixture of 70% ethanol and 30% ethanol to gently wipe it.
3. Biological microscopes cannot be placed together with corrosive acids, reducing chemicals or highly volatile chemicals to avoid corrosion and shorten their service life. In principle, when observing specimens containing liquid, a cover slip should generally be covered; if the liquid contains corrosive chemicals such as acids and alkalis, the surroundings of the cover slip should be sealed with paraffin or vaseline, and then the specimen should be observed. . However, since this type of reagents are often used during microscopic identification of traditional Chinese medicines, it is impossible to seal them all. Therefore, special care must be taken to prevent the liquid from flowing onto the stage and from getting on the objective lens.
4. The biological microscope should not be exposed to direct sunlight, nor should it be placed near a stove or heater to avoid excessive changes in heat and cold that may cause degumming, deformation or damage to the lens and components.
5. Cleaning the objective lens is limited to the outer surface. If the contact surface is contaminated by drugs, wipe it with lens paper dipped in a little lens cleaning solution (do not use ethanol); if the back needs to be cleaned, wipe it with a soft brush or use a leather suction head to absorb the dust.
6. When turning the coarse and fine adjustment ratio aluminum to adjust the focus, the movement should be slow and do not crush the cover sheet to prevent the objective lens and light collector from being damaged by controlled impact.
7. After using the oil lens, the cedar oil on the lens must be wiped clean (you can wipe it with lens cleaning paper dipped in a little xylene, but be careful that xylene cannot penetrate into the inside of the lens, otherwise xylene will dissolve the adhesive between the lenses) , can cause the lens to fall off).
8. The surface of the reflector must be protected and clean. Do not allow water, xylene or cedar oil to penetrate to prevent the mercury from the reflector from falling off.
9. If the mechanical part is not flexible, you can use a fine silk cloth dipped in xylene to wipe off the rust and grease (do not use ethanol, because these solvents will corrode the paint), and then use a little liquid stone to lubricate it; do not force the twist if it is too tight. Twist to avoid damage.
10. Sometimes stains or foreign objects are found in the field of view of the biological microscope. You can first rotate the eyepiece. If the stains follow the rotation, it can be determined that the stain is on the eyepiece; otherwise, you can move the specimen piece. If the stain follows the movement, the stain is on the specimen slide. If it is neither, the stain is on the objective lens. You can first pick up the front lens of the food mirror, and then check the rear lens. Clean as appropriate.
Sometimes a part of the field of view is not clear. This may be due to fingerprints or dust on the surface of the front lens of the objective or eyepiece. It may also be due to poor specimen preparation or improper use of the microscope, such as improper adjustment of the lighting system. The situation should be identified. Solve them separately.
11. After using the biological microscope, all parts should be wiped clean, the objective lens should be turned into a figure-eight shape, then the lens barrel and light collector should be lowered and fixed, and then the mirror surface of the reflector should be placed in a vertical position.
