How to identify polarized glasses

Polarized sunglasses, some people also call for polarized glasses, polarized lens is used as well as contact lenses and precision made of synthetic resin, made after, can filter the humid from the surface of the water or sunlight reflection of the road. Main advantages: light, can filter to the reflection of dazzling light, 99% 99% of harmful ultraviolet light, and not easily broken. In order to filter the sun shone on the water, land, or snow in the direction of equality of dazzling light, special coating on the lens in vertical, is called a polarized lens. Suitable for outdoor sports, For example: driving, offshore activities, skiing or fishing) When use. More and more people are choosing sunglasses when they choose the polarized sunglasses. So how to identify polarized glasses? In the optical shop the choose and buy when POLARIZED glasses, usually in sunglasses, or in the inner side of the glasses legs will have a POLARIZED ( Polarized lens) Annotations, but there are some famous brand is polarized glasses don't do this kind of marking. This venter introduces three methods of identifying sunglasses really polarized sunglasses. Methods a small card, with test, store had such CARDS are a little formal, as follow: polarizer test card if saw shark 'hidden' by the lens, this is a polarizing glasses ( Sunglasses) 。 If through the lens 'shark' still can't see, this is a common sunglasses method 2, if the store had no test small card, you can ask friends, see who has polarized sunglasses, borrowed test is ok. Will friends polarizing sunglasses and you buy sunglasses added together, if through the two lenses, still can see objects after the lens, you buy is not polariscope. If the lens dark overlay, unable to see the back of the object, is the real polarized sunglasses. Test way below: methods, according to the principle of LCD display, through the polarized lens watch mobile phone LCD screen, when the rotation to a certain Angle, the phone's screen will become a black screen, the phone's screen for polarized lens filter on the direction of the light lead to the phone's screen. Pictures from the network, if you want to delete please contact kaity @ yichao. Cn
related: sunglasses polariscope