Driving glasses are designed according to the polarization angle and radian of the lens, according to the principle of precision optics, and can only allow beneficial light to pass through, while other light sources, such as strong sunlight, car headlights and other light sources, are filtered. Eliminate the interference of external light and avoid dazzling and dazzling situations. This is basically how the driver's mirror is designed.

After we know the design principle of the driver's mirror, how should we detect the driver's glasses? Because the time to buy the glasses is always during the day, we can't always check whether the driver's mirror has an anti-glare function during the day, right? How to do it, it's very simple, prepare a UV lamp, then prepare a piece of white paper, first shine the UV lamp on the white paper to see what happens, then block the lens of the driver's mirror in the middle, and then pass the UV lamp Irradiate the lens and see what happens. A good driver's mirror should be able to block the UV light well, so if you see the result directly on the white paper, you will see the purple light, but on the white paper passing through the lens If you can't see the purple light, or the intensity of the purple light is very weak, it proves that this driving mirror has a good anti-glare function.