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Optical properties of Acrylic at elevated temperatures

Optical properties of Acrylic at elevated temperatures

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 US.  DOes anyone know of a material with similar optical performance (>90% transmissivity, ~1.5 refractive index, with superior thermal characterisitcs.


RE: Optical properties of Acrylic at elevated temperatures

Try ATOHAAS North America Inc  800 523 1532 or 215 785 8290.

Other possibilities:   Cyro Industries 203 795 6081

                            ICI Acrylics    800 386 2175

Good Luck

RE: Optical properties of Acrylic at elevated temperatures

Why you do not take e.g. from the company BULKHEAD to glass in Mainz. With plastics you have always the problem with the high thermal expansion.
Heinz Federau

RE: Optical properties of Acrylic at elevated temperatures

Try TOPAS from TICONA. It is a cyclo-olefinic copolymer with excellent optics and a high glass transition temperature and a low thermal expansion, so I assume this would solve your birefringence problems.

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