Are Polarized Glasses UV Resistant?
Are Polarized Glasses UV Resistant?
The deflection mirror is UV resistant, but its protection ability is weak.
The primary function of polarized sunglasses is to prevent ultraviolet rays and filter polarized light. Good polarized sunglasses can block the penetration of more than 90% ultraviolet rays. Polarized sunglasses with the "UV400" best UV blocking logo have the best UV effect.
Polarizer is a lens made according to the polarization principle of light, which can exclude and filter the scattered light in the beam, and filter polarized light in an ultraviolet resistant way. A good polarizer can ensure that the color of the surrounding environment is not distorted, the edge of the object is clear, can effectively identify different color signal lights, and reduce the effect of ultraviolet rays shining into the pupil.
The polarizer is like a shutter, which only blocks part of the light, but still allows light (including ultraviolet) that is basically parallel to the polarization angle. The shielding rate is less than 50%. From the perspective of protection, it is equivalent to adding a layer of soft yarn to the window, which is only partially blocked.
How to judge whether polarized sunglasses have anti ultraviolet function?
1. Look at the label
Sunglasses with UV function generally have several ways:
1) Mark "UV400": this means that the cut-off wavelength of the lens to ultraviolet light is 400mm
2) Mark "UV", "UV protection": this means that the cut-off wavelength of the lens to UV is 380mm
3) Mark "100% UV absorption": this means that the lens has 100% UV absorption function.
2. Verify with banknote+banknote verification pen
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