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 light area. There is also a high smooth transmission curve in the forest. For example, the glass used in film baking, film projection, slide show, color printing, etc., not only requires the heat generated by the light source to be isolated, to protect the film, but also does not affect the color reproduction. In terms of composition, this glass generally belongs to the phosphate glass system. The other type requires absorption of some infrared rays. The glass is also allowed to have some colors. For example, windows in buildings in hot areas, shadowless lamps for surgery, and windshields for automobiles. This glass generally belongs to the silicate glass system.

They do not significantly absorb visible light but absorb a lot of near-infrared light that generates heat. Among them, XRB1 and XRB3 have the most obvious performance characteristics when they need high light intensity and need to remove heat. The use of coated hot glass in construction can directly reduce the temperature, the temperature difference is about 3 ℃ -6 ℃.