Guns_and_Labs
Member
Oh, the frames were all toast by the time we were done. We were more interested in whether the eyes were protected. As I recall, the winners all survived the pellet gun and the nail gun, the lenses survived the birdshot (the frames did not), and the surviving lenses all failed the .22.The glasses that did not hold up under testing, did the lenses all fail, or was it the frames that got destroyed? Polarized or non ?
For optical quality, we shot broad spectrum lasers through them at different angles and measured any distortion or shift. None were polarized, and I have no idea how to test the polarization anyway.
We also threw them in thermal cyclers, as a kind of accelerated wear test. In retrospect, that was kind of silly. Polycarbonate does degrade in some aspects over time, but not over the time we had.