The basic knowledge of glass lens pvd coating machine, we know that any object has a reflection effect on light, which is also the reason why we can see things. For the lens, in order for the light to be able to completely pass through the lens and fully reflect the true situation of nature on the negative, it is best for the lens to completely pass through all kinds of light. High quality optical glass, its light transmittance can reach 90%Above, the remaining light loss needs to be covered with a film on the surface of the lens. Therefore, the optical lens is mainly plated anti-reflection film also called anti-reflection film. In order to meet various requirements, it is often necessary to plate multilayer films. In order to improve the scratch resistance of the glass, the outermost layer is often a high-hardness film. In the laboratory, modern technology allows almost 100 percent of the light to pass through. The reason for this is that in actual use, the lens will be more or less affected by dust, dirt, etc., so that the light through the lens is reduced. There are many methods of coating, but there are only a few conventional methods.

(A) chemical methods, including sol-gel method, chemical vapor deposition and other methods. A solution of a certain composition is prepared according to the properties of the membrane, and then:
1. Dip plating. The clean glass is heated to a certain temperature, then placed in a prepared chemical solution, taken out and dried. The mask is clearly a double mask.
2. Spray plating. The prepared membrane solution is placed on a spray gun and sprayed onto a clean, hot glass surface. Dry. The vitreous body can be moved or rotated to increase the uniformity of the membrane. Can be plated on both sides or single sides. (In the past, the so-called glue casting method was used for lens coating, but because it is uneconomical, it has been eliminated when plating inorganic film by modern process, but it is still a common and low-cost method for plating organic film).
(2) Physical coating method. pvd coating machine physical coating method has a variety of different forms such as vacuum evaporation, ion coating, sputtering coating (all can be reduced to physical vapor deposition). It is mainly used for metal plating film and reflection film. Like a mirror. Generally, the coating strength of chemical methods is generally lower than that of physical methods, but with the rapid development of coating technology, especially in the past ten or twenty years, the effect achieved by chemical or physical methods is no longer any different. It just makes a difference in cost. Previously, the chemical method can only be plated with a layer of film, plating the second layer, due to the influence of temperature often destroy the upper film, but modern technology has basically solved this problem.以上