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How to prevent contamination by adopting preventive measures for cleaning optical lenses
In the cleaning process of optical lenses, any sticky matter, even nail marks or oil drops, will increase the absorption rate of the lens and reduce the service life. Therefore, the following precautions must be taken:
(1) Never use your bare fingers to install the lens. Wear finger cots or rubber gloves.
(2) Do not use sharp instruments to avoid scratches on the lens surface.
(3) Do not touch the film when taking the lens, but hold the edge of the lens.
(4) The lens should be placed in a dry and tidy place for testing and cleaning. There should be several layers of cleaning tissues or wipes on the surface of a good workbench, and several sheets of lens cleaning tissues.
(5) Users should avoid talking above the lens, and keep food, beverages and other potential contaminants away from the optical lens environment
In the process of cleaning the optical lens, the only purpose is to remove the contaminants of the lens, and not to cause further pollution and damage to the lens.
Optical lens, in general, means that lenses made of optical glass are mainly used in optical instruments. Optical instruments are composed of a single or a combination of multiple optical devices. Optical instruments are mainly divided into There are two major categories, one is the real image-forming optical instruments, slide projectors, cameras, etc., and the other is the virtual image-forming optical instruments, such as telescopes, microscopes, magnifying glasses, etc. Optical lenses play a major role in optical instruments and cannot be ignored.
The refractive index of the optical lens is also different, and the lens will form a 'floating lens' plan. When focusing, each lens group will move independently, and the lenses are all in the lens barrel. The external lens design is moved to complete the focus business. I heard that the refractive index of the optical lens is also different. Milling is to remove the uneven bubbles and impurities on the surface of the lens. The milled lens removes its damage layer and removes the polished lens. The lens will clean the polishing powder on the surface.
The glass used to make the lens was the lumps on the ordinary window glass or wine bottle. At that time, the glass of the optical lens was extremely uneven and foamy. The refractive index of the lens is also different, and the color is yellowish. It is coated with a layer of anti-reflection film to compensate for it. It has an abnormal color light refractive index, so the light of the ED lens can be converged at the same point as before. So it is called ultra-low dispersion.
The addition of optical lens to the absorption of laser wavelength will cause uneven laser lens heating to cause reflection of the lens, the refractive index changes, and the laser wavelength is transmitted or reflected from the high-absorption lens When the laser power is unevenly diffused, the center temperature of the lens is high and the edge temperature is low. This kind of distortion is optically called the lens effect. All lenses are mostly caused by the causes of the craftsmanship or external contamination and other components that cause the lens to converge to a specific laser wavelength. Overnight, the life of the lens is compressed. Due to the damage of the lens, the composition affects the use or even the shutdown occurs. .
When holding the optical system by hand, wear finger cots or medical gloves regardless of pickling, assembly, and installation, and always follow the application for cleaning the lens. And pay attention to accidents. In the cleaning process, only delineated materials can be used, such as optical lens cleaning paper, high-power laser lens set, cotton swabs, and reagent grade ethanol. The pickling, disassembly, and installation of any lens will shorten the life of the lens, or even slack eternally. Therefore, we must use ordinary common sense to prevent the lens from being contaminated by other reasons, such as preventing moisture, smoke, dust and so on. After confirming that a certain lens is polluted, we need to blow the lens with the ear-washing ball until there are no particles on the outside of the optical lens. Never blow with the mouth.
The lens burn caused by the infection caused by the high divergence of the lens will cause a lot of headlines. The generation of irreversible thermal stress on the lens substrate, the short-term power loss of the beam passing through the mirror, the deviation of the focus position, and the premature damage of the coating layer can all cause the lens to be damaged. Regarding the lenses exposed to the air, our mirrors often do not follow the application for cleaning the lenses and pay attention to the disorder, and easily take materials. After all, it will cause new contamination or even scratches on the lenses, which constitutes an irreparable loss. Such as fingerprints and spit flowers. Since most of the air blown out contains oil, water, etc., it will further infect the lens. How can it get rid of most of the infected thin layer.
The infection of the lens in the laser will cause the laser input to cause the data to be trivial and constitute a serious search error pool. If we or the lens often keeps clean, it will be delayed. Time the service life of the whole machine. Therefore, following many years of teaching, it is concluded that no matter which type of optical lens is most needed to maintain cleanliness, a good cleaning folkway to carefully clean the lens can reduce or cause infection caused by irrelevant treatment.