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Thread: Polarized lenses and UV protection

  1. #1
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    Confused Polarized lenses and UV protection

    This is probably a simple question but I am unable to find the answer on this board thus far:

    Do all polarized lenses block UV or is dependent on the lens material?



    I am specifically wondering if CR39 Polarized lenses block most UV light?
    (I would think the filter would block most UV light out, but I am unable to find any information online or on optiboard)



  2. #2
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    I've never heard of a polarized lens that didn't advertize 100% UV protection even in CR39. I'm not sure the polarization itself necessarilly blocks the UV, but nevertheless every manufacturer will incorperate a UV block into the process by some means or another. I think it's a very safe bet they all do, tho put 'em under the spectrometer when back from the lab to confirm.

  3. #3
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    CR39 by itself does not absorb UV unless it has been treated with a UV solution. Poly contains UV absorbers in the material.

  4. #4
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    Quote Originally Posted by David_Garza View Post
    This is probably a simple question but I am unable to find the answer on this board thus far:

    Do all polarized lenses block UV or is dependent on the lens material?



    I am specifically wondering if CR39 Polarized lenses block most UV light?

    (I would think the filter would block most UV light out, but I am unable to find any information online or on optiboard)


    Polarization affects the direction of vibration of light waves, but not their wavelength. In fact, pretty much any sunglass lens you buy from a mainstream manufacturer will be UV-absorbant, whether CR39 or any other material, whether polarized or not. If it is CR39, it will have to have been treated to absorb UV. Polaroid lenses will be UV absorbant, but not because of the polarizing effect.

  5. #5
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    All Polarized lenses sold in the US under the banners of KBco, Nupolar, Specialty Lens iRX and Xperio offer UV protection.

  6. #6
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    I will prefer polarized lens. Cause you can see better and enjoy more the outdoor activities without any disturbance.

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