How to distinguish between polarized sunglasses

As people a more profound understanding of sunglasses, commuters, outdoor travel and sports leisure, people would choose the polarized sunglasses as they travel supplies, because polarized sunglasses can filter the glare, and can better prevent ultraviolet ray, see things more clearly. But now the sunglasses on market is multifarious, how should we recognize polarized sunglasses? 1. Polarization test card polariscope with a polarization test card, can't see through the polaroid can see normal light images. Clear image contour, polaroid quality, the better. 2. Polarized sunglasses overlap put two polarizing lenses stacked vertically, the lens will not pervious to light. Because the polarizer lens special design of parallel light through the lens, when the two lenses stacked vertically, most of the light is blocked. Everybody when buy, as long as such a simple operation, can immediately know the authenticity of a product and the good or bad. 3. A LCD screen, LCD display will glasses level on the screen, lens did not change at this moment, and then clockwise the glasses up to 45 ° Angle, see the lens color is darker, then turn back to normal again, this is polarized lens, if there is no change, no matter how is not a polaroid. ( Attention must be liquid crystal display) Ms sunglasses factory YC9703 sunglasses C2 red box grey/gold 4 legs. Yanchao ultraviolet ray of light is polarized sunglasses can block ultraviolet light completely, if you want to know if your sunglasses polarizer, you also can test the lens can isolate uv: looking for a uv yanchao lights, a one hundred - yuan RMB. Direct illuminate can see above one hundred yuan RMB uv anti-counterfeiting. If through the lens with UV400 functions, see the anti-counterfeiting. Above is the distinguish method of polarized sunglasses, on the other hand, polarized sunglasses price is generally more expensive sunglasses, small make up recommend to normal optician to buy. If you want to learn more knowledge of polarized sunglasses, can go to the glasses sunglasses factory network view.
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