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Those bubbles in the glass that you can see when viewed from certain angles, are those normal?
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I understand this is due to slight differences in stress in laminated glass. You can see it with polarized lenses in your sunglasses, or in the case of that picture, a polarized filter on the camera lens. But you typically won't be able to see it with the naked eye.
If you look at certain types laminate, plex or lexan, you will also see it. You can make the marks change/move around if you push on the sheet with your finger, thereby stressing the sheet in a different way. Kinda fun. Nerdy fun.
Polarized light is also used to QA big sheets of the stuff to make sure it doesn't have defects (aka to make sure it isn't pre-stressed in such a way that it will fail).
A different process is used to build the side glass -v- the front windshield or you'd have a tough time seeing out the front with your polarized sunglasses.
Normal.