Insulation glass can be divided into two categories according to different requirements. One is that it can absorb a large amount of infrared rays, and the glass is basically colorless, that is to say, this glass should be 400m to 76 in the visible region.

The anti-wear film began in the early 1970s, when it was believed that optical 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 plated 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.

There are many types of glass, optical glass is one of them, it can change the direction of light propagation. It is widely used in lenses and prisms of optical instruments. Optical glass must meet the requirements of the imaging of light. It is no different from ordinary glass and has high requirements for the quality of optical glass. Qualified optical glass needs to meet the following requirements.

The streaks produced by ordinary glass are mainly caused by uneven batch materials; corrosion of refractory materials (mainly introducing Al); and agitation during the manufacture of glass products.

The raw materials for producing optical glass are some oxides, hydroxides, nitrates and carbonates, and phosphates or fluorides are introduced according to the requirements of the formula. In order to ensure the transparency of glass, the content of colored impurities must be strictly controlled, such as iron, chromium, copper, manganese, cobalt, nickel, etc. It requires accurate weighing and uniform mixing during batching. The main production processes are smelting, forming, annealing and inspection.