Optical filter is an optical device used to select the required radiation band. A common feature of filters is that no filter can make the imaging of celestial bodies brighter, because all filters will absorb certain wavelengths, making objects darker. The filter is made of plastic or glass with special dyes. The red filter can only let the red light pass through, and so on.
Optical filters play an important role. Widely used in photography. Color filter is a kind of optical filter that represents color. It can accurately select the light wave in a small range to pass through, and reflect other unwanted bands. Color optical filters are usually installed in front of the light source, so that the human eye can receive saturated light of a certain color.
All optical elements are precision instruments, especially optical filters, whose surfaces are easily scratched. Improper cleaning and storage may damage the surface of the filter surface, reduce its application performance and shorten its service life. Therefore, the correct maintenance method is very important.
During the normal use of optical filters, they should be taken and placed as carefully as possible, and pay attention to the external environment to prevent scratching the filters. Wear a finger sleeve when contacting the filter to avoid the corrosion of the substrate surface by salt and acidic substances on your hands. If the acid left by fingers stays too long, it is easy to react with the surface coating material and become permanent stains. Therefore, the surface stains of the filter should be cleaned in time. Pay special attention not to stack the filters together to avoid wear.
All optical elements are precision instruments, especially optical filters, whose surfaces are easily scratched. The above methods are only for optical glass and are not completely applicable to optical filters made of plastic and other substrate materials. Please note that the maintenance methods of different optical filters depend on the type of product and the nature of care needs. I hope this knowledge can give you some help.