What are the best Polarized Sunglasses?

i-657b3aad5096f591d534bed7db3dd91c-broken_glasses.jpgA while back, I explained how polarized sunglasses work, the short version of which is that light reflected off the ground in front of you tends to be polarized, and by blocking that light, they reduce the effects of glare. This is why fishermen wear polarized sunglasses (they make it easier to see through the surface of water) and why they’re good for driving (they cut down on glare off the road ahead). I almost exclusively buy polarized sunglasses, because I like this feature.

But let’s say you have a pair of polarized sunglasses that broke, because they were cheap to begin with (such as the ones at right). At that point, they’re useless, right? Not if you’re a physicist– you can use them to answer the burning question, “How good are the polarizers in those sunglasses, anyway?”

The answer turns out to be “surprisingly good.” Here’s the apparatus you need to do this test:

On the left, the black tube is a helium-neon laser I borrowed from the teaching labs. The light from the laser passes through a research-grade polarizer (a Glan-Thompson, also borrowed from the teaching lab) on a rotating mount, then one lens from the broken sunglasses taped to another rotating mount, then onto a photodiode. The white-and-blue oscilloscope at the left served to make the necessary voltage measurements, which is overkill, but we have a bunch of them kicking around, and all the voltmeters in the basement labs had dead batteries (as did the nice power meter, because my summer student left it turned on, and we’re out of the special batteries it takes).

The procedure is simple: the laser passes through the G-T polarizer, which establishes a linear polarization for the beam, then it goes through the sunglasses lens, which transmits a fraction of the light that depends on the angle between its polarization axis and the G-T polarizer. The figure you use to measure the quality of the polarizer is the “extinction ratio, ” which is the ratio of the minimum and maximum transmitted intensities. For an ideal polarizer, this would be zero– perfectly polarized light would be completely blocked by an ideal polarizer at 90 degrees from the light polarization– but nothing is perfect, so there’s always a little bit of light leaking through.

To establish a baseline for this, the first thing I did was to test two G-T polarizers together (part of the reason for using that type in the first place was that we have two identical ones in the optics lab). With the two G-T polarizers in the beam, the diode output was 0.134V with a neutral-density filter with OD 30 (that is, a filter that reduced the intensity of the light by a factor of 1000) in front of the diode. Why knock the power down this way? Because if I didn’t, the diode would saturate at its maximum value, and I wouldn’t get an accurate reading. This way, the diode is safely in a regime where the output voltage increases linearly with the input intensity.

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Ray-Ban Ray-Ban RB3016 Classic Clubmaster Sunglasses, Non-Polarized, Tortoise/Arista Frame/Crystal Green Lens, 49 mm
Apparel (Ray-Ban)
  • Every model in the Ray-Ban collection is the product of meticulous, original styling that translates the best of the latest fashion trends into an ever-contemporary...
  • Ray-Ban sizes refer to the width of one lens in millimeters.
  • Ray-Ban products sold by authorized sellers, like Amazon.com, are eligible for all manufacturer warranties and guarantees.
  • Protective case included, cases come in a variety of colors.
  • Lenses are prescription-ready (Rx-able).
  • Made in China
  • Made in Italy or China.
  • Ray-Ban products include an etched RB on the left lens. The RB is not a scratch or defect.
  • The shape and curvature of these sunglasses may need adjustments. Adjustments should only be made by a professional.

Wade-fishing tips from a retiring FWC staffer  — Hernando Today
Don't overfill your bait bucket. You only need 10 to 20 specimens at a time. More than that can kill the bait. ♢ Protect yourself from the sun. Kirkland wears long sleeves, a hat, a Buff and good polarizing sunglasses and says all are a must.

Oakley Oakley Men's Flak Jacket XLJ Polarized Sunglasses,Jet Black Frame/Black Iridium,one size
Shoes (Oakley)
  • Case Type: hard
  • Hinge: O Matter
  • Lens: plutonite polycarbonate
  • Polarized: yes
  • Interchangeable Lens: yes
The Best Polarized Fishing Sun Glasses - Ocean Waves
The Best Polarized Fishing Sun Glasses - Ocean Waves
Polarized sunglasses
Polarized sunglasses
AquaRayPromo.flv
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Ray-Ban Junior Ray-Ban RB2132 New Wayfarer Sunglasses,Black Frame/G-15-XLT Lens,55 mm
Apparel (Ray-Ban Junior)
  • Every model in the Ray-Ban collection is the product of meticulous, original styling that translates the best of the latest fashion trends into an ever-contemporary...
  • Ray-Ban sizes refer to the width of one lens in millimeters.
  • Ray-Ban products sold by authorized sellers, like Amazon.com, are eligible for all manufacturer warranties and guarantees.
  • Protective case included, cases come in a variety of colors.
  • Lenses are prescription-ready (Rx-able).
  • Made in Italy or China.
  • Ray-Ban products include an etched RB on the left lens. The RB is not a scratch or defect.
  • The shape and curvature of these sunglasses may need adjustments. Adjustments should only be made by a professional.
Excelvan Excelvan Polarized Sunglasses HD 720P 5MP Mini Camera Digital Video Recorder DV Eyewear Camcorder Audio-Support TF Card Up to 32GB
Photography (Excelvan)
  • HD Camera: Work as a HD Mini Camera to record gorgeous moments
  • TF Card: Support TF Card (Max. 32GB), can watch what you record in TF Card by computer/ smartphone and so on
  • U Disk: Support TF Card (Max. 32GB), can store movie/ music/ documents and so on
  • PC Camera: Work as pc camera to communicate with your friends/ family, let them to see you, more warm
  • Sunglasses: Polarized Sunglasses can protect your eyes as it can effectively prevent ultraviolet and harmful blue light. So it is the best partner for driver and...
Ray-Ban Ray-Ban RB2140 Original Wayfarer Sunglasses 50 mm,Black frame/Crystal Green Polarized lens
Apparel (Ray-Ban)
  • Every model in the Ray-Ban collection is the product of meticulous, original styling that translates the best of the latest fashion trends into an ever-contemporary...
  • Ray-Ban sizes refer to the width of one lens in millimeters.
  • Ray-Ban products sold by authorized sellers, like Amazon.com, are eligible for all manufacturer warranties and guarantees.
  • Protective case included, cases come in a variety of colors.
  • Lenses are prescription-ready (Rx-able).
  • Made in Italy or China.
  • Ray-Ban products include an etched RB on the left lens. The RB is not a scratch or defect.
  • Slight adjustments to the shape and curvature of the sunglasses arms may be needed to get a custom fit. Adjustments should be made by a professional.
  • The shape and curvature of these sunglasses may need adjustments. Adjustments should only be made by a professional.

Popular Q&A

avatar
Ray Ban Top Bar Oval Frame Polarized Sunglasses


Not only should it have the logo on the top right corner of the right lens, it should have an etched RB logo on the left lens. Most fakes are printed.
In most optical stores or sunglasses stores, they will have an image for you to compare polarized versus non-polarized lenses against. However, since you are buying them online, you will not be able to test them out until they are in your hands.
Ebay has a very strict policy on selling fakes and if you call the seller on it, they will back-paddle pretty quickly to make sure you don't report them and thereby getting their account suspen…

avatar
Does every Ray Ban Original WAYFARER Sunglasses RB2140 Polarized have the RAY BAN logo on the top corner?

I am wondering because i am trying to buy some on ebay and im worried if they are fake or not, they have the logo on the arm but not on the lens, and how would i know if they are fake, and it says they are polarized, PLEASE HELP IM WORRIED

If you are looking for polarized then it should have Ray-Ban - P.
Not only should it have the logo on the top right corner of the right lens, it should have an etched RB logo on the left lens. Most fakes are printed.
In most optical stores or sunglasses stores, they will have an image for you to compare polarized versus non-polarized lenses against. However, since you are buying them online, you will not be able to test them out until they are in your hands.
Ebay has a very strict policy on selling fakes and if you call the seller on it, they will back-paddle pretty quickly to make s…

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