Do you know how to test CB Layer Coating lens? Let's take a look at it together!
1. The relationship between anti-reflection film and anti-wear film
The anti-reflection coating on the surface of the lens is a very thin inorganic metal oxide material (thickness less than 1 micron), hard and brittle. When it is plated on a glass lens, since the base is relatively hard and the grit is scratched on it, the film layer is relatively difficult to scratch; but when the anti-reflection film is plated on the organic lens, because the base is soft, the grit is on the film. Scratched on the layer, the film is easily scratched.

2. Frosted test
Place the lens in a promotional material containing gravel (the grain size and hardness of the gravel are specified), and rub back and forth under certain control. After the end, use a haze meter to test the amount of diffuse reflection of light before and after the lens is rubbed, and compare it with the standard lens.
3. Steel wool test
Use a prescribed steel wool to rub the surface of the lens for a number of times under a certain pressure and speed, and then use a haze meter to test the amount of diffuse reflection of the lens before and after the friction, and compare it with the standard lens. Of course, we can also do it manually, rub the two lenses the same number of times with the same pressure, and then observe and compare them with the naked eye.
In summary, it is a brief introduction to related knowledge about testing CB Layer Coating lens.