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  1. andyhodgkinson

    Optical properties of Acrylic at elevated temperatures

    I am in a situation where I have a 40mm thick piece of Acrylic between two polarizers. My problem is that the acrylic turns birefringent at around 35 deg C, and optical performance is badly degraded. I have contacted Ineos about Perspex, but it is not available in the right thickness in the...

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