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What is anti-reflective glass

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Update time : 2023-02-21 11:00:00

The projection principle of anti-reflective glass: when the beam is close to normal incidence (the incidence Angle θ is about 0)), the reflectivity calculation formula is: R=(n1-n2)^2/(n1+n2)^2

Where, n1 and n2 are the true refractive indices (that is, refractive indices relative to vacuum) of the two media respectively. Refractive index refers to the phenomenon that the Angle of light rays changes when they enter different media, and is represented by sinθ1/sinθ2. θ1 and θ2 are the angles of incidence and refraction, respectively, the Angle between the ray and the normal.

In general, the reflectance of light rays on the critical plane depends only on the physical properties of the medium, the wavelength of light, and the Angle of incidence.

It can be seen that when nans=nf2, R=0; otherwise, R can be obtained through calculation. For example, in vacuum (na=1.0), light incident vertically on K9 glass (ns=1.5168) coated with single layer MgF2(nf=1.3836) can be obtained. The reflectivity is around 1.34% (i.e., transmittance is around 98.6%); When hot, the actual coating situation is much more complicated than the above formula, through the multilayer coating, we can get the desired reflectance (or transmittance).

Group application of anti-reflective glass

1. Anti-reflective glass (film surface at 1#)+ film +low-E glass (double silver line, film surface at 4#)+ hollow layer + ordinary glass, outdoor reflectance can reach 6-7%, shading 0.35, U value 1.6

2. Anti-reflective glass (film surface in 1#)+ film +low-E and anti-reflection glass (online lowE, both film surface in 4#)+ hollow layer + ordinary glass, outdoor reflectance can reach 6-7%, shading 0.35, U value 1.6

3. Anti-reflective glass (film surface at 1#)+ film + anti-reflection glass (film surface at 4#)+ hollow layer +lowE glass, outdoor reflectance can reach 6-7%, shading rate to be determined, U value 1.6; But lowE's color is going to be a little bit off
4. Anti-reflective glass (film surface at 1#)+ film + anti-reflection glass (film surface at 4#)+ hollow layer + online lowE, outdoor reflectance can reach 6-7%, shading 0.35, U value 1.6

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