The difference between polarized and unpolarized sunglasses

If you want to get a pair of sunglasses, so sunglasses have polarized and non-polarized points, you are in the purchase is not the introduction of the hype? Want to know the difference between polarized and unpolarized sunglasses?

One, the difference between sunglasses polarized and non-polarized

The difference between polarized and unpolarized sunglasses lies in the way they deal with reflected light. In our living environment, there are three kinds of light: direct light, reflected light and diffuse light. Diffuse light is not perceived by us at ordinary times, but it is the most important kind of light that our eyes can see objects. Direct light, on the other hand, because it has a fixed source of light (such as the sun), will not cause harm to our lives as long as we pay attention to it. These common reflectors in life often reflect light suddenly, which will bring a lot of inconvenience to our life. For example, the rear view mirror in front of a driver is an uncertain reflection light source. The water on the side of the road or the smooth plane objects carried by passers-by can become a reflection light source, which may bring trouble or even danger to the driver's driving.

Polarized sunglasses are designed to filter out the reflected glare, so they can prevent vertigo, and they can also make the field of vision clearer and reduce visual fatigue on summer trips. Unpolarized sunglasses, on the other hand, are the opposite, so polarizing mirrors are much more expensive than unpolarized ones.

Second, the main use of polarizer

The main purpose of polarizer is to protect the eye from damage under certain conditions. However TO THE PERSON WITH GENERAL REQUIREMENT NOT VERY TALL, IT IS OK TO USE COMMON SUNGLASSES, BECAUSE POLARIZED SUNGLASSES BELONG TO THE RELATIVELY HIGH-GRADE POINT IN SUNGLASSES. Of course, if you need to drive car owners, it is better to wear while driving polarized sunglasses, because driving often will encounter all sorts of dazzle light, polarized sunglasses can block part of dazzle light at the same time, also can filter out the ground or across the body reflected light, so that the vision more clearly, reduce visual fatigue, is helpful to safe driving.

Three, polarizing lens and ordinary solar lens discrimination

When buying polarized sunglasses, pay attention to identification. In fact, the difference between polarizer and sunglasses and other methods are relatively simple. As long as the two polarizing lenses are stacked vertically, if they are not transparent, it indicates that they are real polarizers. Because the polarizing lenses are specially designed to allow only parallel light to pass through the lens, most of the light will be blocked when the two lenses are stacked vertically.