Repair and maintenance of microscopes
1. Regular maintenance
(1) Moisture-proof: If the room is damp, optical lenses are prone to mold and mist. Once the lenses become moldy, it is difficult to remove them. The lenses inside the microscope are inconvenient to wipe, and moisture poses a greater risk to them. Mechanical parts are prone to rust after being damp. To prevent moisture, when storing the microscope, in addition to choosing a dry room, the storage location should also be away from the wall or ground Keep away from wet sources. 1-2 bags of silicone gel should be placed inside the microscope box as a desiccant, and the silicone should be frequently baked. After its color turns pink, it should be baked in a timely manner before continuing to use
(2) Dust falling on the surface of dustproof optical components not only affects the passage of light, but also generates large stains after being magnified by the optical system, which affects observation. Dust and sand particles falling into mechanical parts can also increase wear and tear, causing movement obstruction and posing great harm. Therefore, it is necessary to maintain the cleanliness of the microscope regularly
(3) The anti-corrosion microscope should not be placed together with corrosive chemical reagents such as sulfuric acid, hydrochloric acid, strong alkali, etc
(4) The main purpose of heat protection is to prevent the opening and detachment of lenses caused by thermal expansion and contraction
2. Wiping of optical systems
Usually, clean the surface of each optical part of the microscope with a clean brush or wipe it clean with lens wiping paper. When there are stains, oil stains, or finger marks that cannot be wiped off the lens, mold, fog, or reuse after long-term use, it is necessary to wipe it first before use
(1) The scope of wiping is that the eyepiece and condenser lens can be disassembled for wiping. Due to the complex structure of the objective lens, specialized instruments need to be used for calibration during assembly to restore the original accuracy. Therefore, it is strictly prohibited to disassemble and wipe
When disassembling the eyepiece and condenser, pay attention to the following points:
a. Be cautious and cautious
b. When disassembling, it is necessary to mark the relative position of each component (which can be marked with a line on the shell), the relative order, and the front and back sides of the lens to prevent errors during reassembly
c. The operating environment should be kept clean and dry. When disassembling the eyepiece, just unscrew the upper and lower lenses from both ends. The field of view light bar inside the eyepiece cannot be moved. Otherwise, the field of view boundary will be blurred. After loosening the condenser, it is strictly prohibited to further disassemble the upper lens. As the upper lens is oil immersed, it is well sealed before leaving the factory, and further disassembly will damage its sealing performance and damage it
Wiping method: First, use a clean brush or hair dryer to remove dust from the surface of the lens. Then, use a clean lint cloth to make a spiral unidirectional movement from the center of the lens to the edge. After wiping, change the lint cloth to another place and wipe until it is completely wiped. If there are oil stains, dirt, or fingerprints on the lens that cannot be wiped off, wrap a willow stick with absorbent cotton, Dip a small amount of alcohol and ether mixture (80% alcohol, 20% ether) to wipe. If there are heavy mold spots or spots that cannot be removed, you can use a cotton swab to moisten them with water and stick calcium carbonate powder (with a content of over 99%) for wiping. After wiping, the powder should be cleaned. Whether the lens is wiped clean, you can observe and check the reflected light on the lens. It should be noted that the dust must be removed before wiping. Otherwise, The sand particles in the dust can create grooves on the mirror surface. It is not allowed to use towels, handkerchiefs, clothes, etc. to wipe the lens. Alcohol ether mixture should not be used too much to prevent the liquid from entering the adhesive part of the lens and causing the lens to unglue. There is a layer of purple blue transparent film on the surface of the lens, and it should not be mistakenly wiped away by dirt
3. Wiping of mechanical parts
The painted part of the surface can be wiped with a cloth. However, organic solvents such as alcohol and ether cannot be used to prevent paint detachment. If there is rust on the unpainted part, a cloth dipped in gasoline can be used to wipe it off. After wiping it off, protective grease can be reapplied
