What is the role of polarized sunglasses?
How to identify?
Now on the market of sun glasses is varied, not only style variety, function also is not the same, there is a kind of polarized sunglasses is the quality of many choice, why do you say that?
Because of the effect of polarized sun glasses is not small.
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Polarization is a kind of function actually, not natural light in the initial polarization, it spread in all directions, but when its in a smooth, flat, such as water, snow, beach, the road surface reflection, light is broken into the vertical and horizontal wave.
Vertical direction of the light is a useful light level in the direction of the light is bad for our eyes glare, polarized lens is to use colored silicon crystal coating arrangement in vertical direction, like the shutter will parallel light cover, so that glare don't into our eyes.
What is a polarized sunglasses?
Polarized sun glasses is to use the feature block harmful light, because the sun both in touch any objects by natural reflection or refraction of harmful glare, polarized sunglasses can fully absorb the cause dazzling light and eye damage.
Polarized sunglasses because has the function of the polarization of light, so will all the harmful rays of blocking off does not affect the visible light through, can truly achieve the purpose of protecting our eyes.
What's the function of polarized sunglasses?
When driving, if you exercise of traffic in zigzag, you won't be as from the sun and the number of vehicles in front of the reflective distress;
Fishing, water waves in the sun shine, but you won't feel not adapt, feels more comfortable unfettered: reflective disappeared;
On the boundless fallen snow. where, ski, you don't have to worry about reflective and ultraviolet ray, can enjoy gliding;
When it rains, the rainwater flowing of road traffic signs clearly in front of your eyes;
On vacation, more ultraviolet effectively block, let you enjoy this rare leisure time.
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Polarization test card.
The simplest method is to use polarization test card glasses to test whether there is polarization effect, general polarized glasses box will be accompanied by polarization test card, if it is not polarized test card can try the following method.
Screen test method.
Combining polariscope principle of polarized light and screen display principle, when rotating polarized lenses watching screen, the screen will appear black screen phenomenon, which is composed of a single direction, and the polarizer filter screen of light.
And because the display screen can be seen everywhere, this also is to identify the most viable method of polarizer.
So how do you choose polarized sunglasses?
Pink or red lens, in the case of strong glare, can enhance contrast and bright degree, is very suitable for water sports and activities using snow.
Brown or brown lens, because can enhance the contrast of color, so become the first choice of lenses while driving.
Amber, yellow or orange lenses, cloudy day is very suitable for wear in, can have a very clear vision, but it is not suitable for strong sunlight.
Depending on the grey or green lens, can retain the original color of the most natural, when is a good choice.
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