Although summer is over, the dazzling sunshine will still appear in autumn and winter. How can we lack a pair of sunglasses in the sunbathing season? So when friends started to buy glasses, they often encountered businessmen introducing polarized lenses, which confused them. Because polarizers and sunglasses look exactly the same, what is the difference?
The difference between polarized glasses and sunglasses:
We all know that the primary purpose of sunglasses is to shade and prevent ultraviolet rays. In other words, the sunglasses we often say are tinted glasses used to block sunlight and ultraviolet rays, generally brown or green.
However, in addition to sunlight and ultraviolet rays in our lives, glare is more harmful to the eyes, it will make our eyes tired and affect the clarity of vision, and this glare in ordinary sunglasses cannot be eliminated, only through Thorough filtering through the polarizer. The color of the common polarized glasses is mainly dark gray.
In fact, polarizers can be regarded as sunglasses, but polarizers are a relatively high-end category. Polarizers have an effect that ordinary sunglasses do not have. This effect effectively blocks and filters out all kinds of polarized light that are harmful to the eyes. The so-called polarized light is the irregular reflection of light generated when light passes through uneven roads, water surfaces, etc., also known as glare. When these rays of light directly irradiate people's eyes, it will cause discomfort and fatigue to the eyes, and cannot see objects for a long time, and the clarity of the objects seen is obviously insufficient.
Therefore, the main difference between polarizers and sunglasses is filter glare.
Identification of polarized lenses and ordinary sunglasses
Polarized glasses and ordinary sunglasses look no different, which also creates a means for unscrupulous merchants to take the opportunity to trap them. So how should we identify them when we buy them?
1. Stack two polarized lenses vertically. If they are opaque, it means that they are truly polarized lenses. Because the special design of polarized lenses only allows parallel light to pass through the lenses, when the two lenses are stacked vertically, the light will be larger. the part will be blocked.
2. Find a UV banknote inspection lamp, one hundred yuan. Directly irradiating the top of the RMB can see the UV anti-counterfeiting of RMB 100. If the lens with UV400 function is separated, the anti-counterfeiting cannot be seen.
3. You can also go to the bottom of the sun for a specific experience. Under the sun, polarized glasses will be significantly more comfortable than ordinary sunglasses.
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