The difference between sunglasses and polarized glasses
When purchasing sunglasses, although most of my friends choose polarized sunglasses, do you know the difference between polarized sunglasses and ordinary sunglasses?
First, the difference between polarized glasses and sunglasses
In fact, polarizers also belong to a category of sunglasses. It and ordinary sunglasses have the effect of preventing ultraviolet rays and reducing the intensity of light, while polarizers have an effect that ordinary sunglasses do not have. This effect is to effectively block and filter out various harmful to the eyes. polarized light.
To easily identify whether it is a polarized lens, just stack two polarized lenses vertically. If it is not light, it means that it is a real polarized lens, otherwise it is an ordinary sunglasses. The principle is because the special design of polarized lenses only allows parallel light to pass through the lenses, so when two lenses are stacked vertically, most of the light will be blocked.
Second, what is polarized light
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 light rays directly irradiate people's eyes, it will make people's eyes uncomfortable and easy to fatigue, so they cannot see objects for a long time, and the clarity of the objects they see is obviously insufficient.
3. The main purpose of polarizer
The main purpose of polarizers is to protect the eyes from damage under certain conditions. But for those who are not very demanding, ordinary sunglasses can be used. Of course, if you are a car owner who needs to drive, it is better to wear polarized sunglasses when driving, because driving often encounters various glare, and polarized sunglasses can block part of the glare, and can also filter out the ground or oncoming vehicles. The strong light reflected from the body makes the field of vision clearer, reduces visual fatigue, and is conducive to safe driving. In addition, it is also more appropriate to wear polarized glasses when fishing, skiing, and vacationing outdoor sports.
