There are two types of glass surface cleaning: atomic level cleaning surface and process technology cleaning surface. Atomic level cleaning is required for special scientific applications because it needs to be carried out under ultra vacuum conditions. Generally, only the clean surface in process technology is required to meet the requirements for product processing.
Optical glass is used for lenses, prisms, lenses, etc. of instruments. In manufacturing and use, it is easy to get greasy dirt, water wet dirt, fingerprints, etc., which affects imaging and light transmittance. To clean the optical glass, different cleaning agents, tools and methods should be selected according to the characteristics and structure of the dirt. Clean the lens coated with antireflection film, such as camera, slide projector and microscope lens, and use about 20% alcohol and 80% ether as cleaning agent. When cleaning, use a soft brush or cotton ball dipped with a small amount of cleaning agent to make a circular movement from the center of the lens outward. Do not immerse such lenses in cleaning agent for cleaning, and do not wipe them hard when cleaning them, otherwise the antireflection film will be damaged and the lens will be damaged.
There are many methods to clean the glass surface, and one of them can be selected or combined according to the original pollution degree of the glass surface, the subsequent glass surface treatment process and the purpose of the final product.
The oil mist, water wet mist and oil-water mixed mist on the optical glass can also be cleaned by using the cleaning agent, and the cleaning method is similar to that of the lens.
Mold on the surface of optical glass is a common phenomenon. When the optical glass is mouldy, the light will scatter on its surface, making the image blurred, and in serious cases, the instrument will be scrapped. The reason for the mildew of optical glass is that there are microbial spores on its surface. When the temperature and humidity are appropriate and "nutrients" are needed, it will grow rapidly and form mildew spots.
It is particularly important to make the optical glass anti mildew and antifouling. Once mildew occurs, it should be cleaned immediately. Pay attention to dryness.