New polarized sunglass + stock tint = LCD flashback!
#1
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From: Orlando, FL
New polarized sunglass + stock tint = LCD flashback!
What is the deal? I got these polarized glasses from my GF and went driving today. I believe my car has stock tinting. It was purchased used. I can only describe the effect of some sort of rainbow waves. Do I just get used to it? Do all tint jobs have this effect?
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From: long island new york
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From: Dallas
I've experienced the same thing before with a pair of glasses. All factory tinted windows with the chemical layer between glass layers gave me the rainbow. A couple of times I got a similar effect with some no-name aftermarket films. Get used to the rainbows, or get new glasses.
#7
Ive seen this effect too so dont worry your not alone. not sure what causes it I think it had something to do with the reflexive ability of the tint and the way it looks threw polarized glasses.
It sure would be nice to know what causes this but at least I know im not crazy not either.
It sure would be nice to know what causes this but at least I know im not crazy not either.
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From: Las Vegas, from Crystal Lake IL
I wear Oakley iridium Polarized sunglasses only and also have tinted windows.
the reason the rainbow effect or oil mixed with water look happens is because Polorized lense are made to focus out certain color spetrums/uv spectrums. With tinted windows this becomes noticable because the tint is already filtering the light and UV rays.
the reason the rainbow effect or oil mixed with water look happens is because Polorized lense are made to focus out certain color spetrums/uv spectrums. With tinted windows this becomes noticable because the tint is already filtering the light and UV rays.
#14
its normal. its the polarized glasses. also a good way to test if there really polarized. there probably one of the best sunglasses you have owned aren't they? i know mine where b4 they broke
#19
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The reason you sometimes can't see the LCD screen is because LCD screens also have a polarizing filter in them and when you look through two polarizing filters that are at opposing angles, no light passes through. This has to do with the way polarizing filters work.
Here is a visual...
Light waves travel in all directions and orientations (Waves: | / - \ = )
Visualize a polarizing filter as a filter that only allows vertical waves to pass (Waves: ||||).
Now visualize an identical polarizing filter rotated 90*, in this rotation only horizontal waves pass (Waves: ======).
When you layer them, they cancel each other out and no light gets through.
--
This is how they filter out glare. They only allow light to pass through in one orientation.
--
Next time you look at your phone through your polarized sunglasses, rotate the phone and watch the screen go black and clear up again.
--
Here is an interesting tidbit. If you want to invert the color on an LCD (gray text on a black background instead of black text on a gray background) rotate its polarizing filter 90*. This changes which light is allowed to pass through, in effect, inverting the colors.
--
The reason you see rainbows on certain surfaces while wearing polarized sunglasses is the same principle. Basically, the glare was hiding it. Well, thats one way of thinking of it. Take a look at a plastic screen/window. You'll see stress points show up as rainbowed areas.
Here is a visual...
Light waves travel in all directions and orientations (Waves: | / - \ = )
Visualize a polarizing filter as a filter that only allows vertical waves to pass (Waves: ||||).
Now visualize an identical polarizing filter rotated 90*, in this rotation only horizontal waves pass (Waves: ======).
When you layer them, they cancel each other out and no light gets through.
--
This is how they filter out glare. They only allow light to pass through in one orientation.
--
Next time you look at your phone through your polarized sunglasses, rotate the phone and watch the screen go black and clear up again.
--
Here is an interesting tidbit. If you want to invert the color on an LCD (gray text on a black background instead of black text on a gray background) rotate its polarizing filter 90*. This changes which light is allowed to pass through, in effect, inverting the colors.
--
The reason you see rainbows on certain surfaces while wearing polarized sunglasses is the same principle. Basically, the glare was hiding it. Well, thats one way of thinking of it. Take a look at a plastic screen/window. You'll see stress points show up as rainbowed areas.
Last edited by VIP1; 04-02-2008 at 12:26 PM.