Vacuum Coating Machine Optical Lens Coating and Development

Vacuum coating machine optical lens coating and its development, whether it is an inorganic or organic spectacle lens, in daily use, due to friction with dust or grit (silicon oxide) will cause lens wear and scratches on the lens surface mark. Compared with glass sheets, the hardness of organic materials is relatively low, and it is more prone to scratches. Through the microscope, we can observe that the scratches on the surface of the lens are mainly divided into two types. One is the scratches caused by the gravel, which are shallow and small, which is difficult for the wearer to notice; the other is the scratches caused by the larger gravel , Deep and rough on the periphery, in the central area will affect vision.

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The anti-wear film began in the early 1970s, when it was believed that glass lenses were not easy to grind because of their high hardness, while organic lenses were too soft to wear easily. Therefore, the quartz material is coated on the surface of the organic lens under vacuum to form a very hard anti-wear film, but due to the mismatch of its thermal expansion coefficient and the base material, it is easy to peel off and the film layer is brittle, so it is resistant to The wear effect is not ideal.

The most important modern anti-wear film coating technology is the immersion method, that is, the lens is immersed in the hardening liquid after multiple cleanings, and after a certain time, it is lifted at a certain speed. This speed is related to the viscosity of the hardening fluid and plays a decisive role in the thickness of the anti-wear film. After lifting, it is polymerized in an oven at about 100 ° C for 4-5 hours, and the thickness of the coating is about 3-5 microns.

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The anti-reflection coating on the lens surface of vacuum coating machines and vacuum coating equipment is a very thin inorganic metal oxide material (thickness less than 1 micron), which is hard and brittle. When plated on glass lenses, because the base is hard, the gravel is scratched on it, and the film layer is relatively unlikely to produce scratches; but when the anti-reflection film is coated on the organic lens, because the base is soft, the gravel is on the film The layer is scratched, and the film layer is prone to scratches. Therefore, organic lenses must be coated with anti-wear films before the anti-reflection coating, and the hardness of the two layers must match.

Zunhua Baorui Titanium is dedicated to the research and development and production of vacuum coating machines and vacuum coating equipment. It is specialized in the manufacture of various coating equipment and provides customers with customized process solutions and vacuum coating equipment.