Multilayer optical bodies

摘要

In various aspects, the present invention provides optical bodies configured and arranged to reflect at least a portion of light over at least one wavelength region, the bodies comprising a plurality of first optical layers (12) comprising a polyester having terephthalate comonomer units and ethylene glycol comonomer units and a plurality of second optical layers (14) disposed in a repeating sequence with the plurality of first optical layers. The first optical layers also comprise a polymor having a glass transition temperature of at least 130 DEG C. In other aspects, the invention provides optical bodies comprising a plurality of first optical layers, each first optical layer being oriented; and a plurality of second optical layers disposed in a repeating sequence with the plurality of first optical layers, each second optical layer comprising a blend of polymethylmethacrylate and polyvinylidene fluoride. Methods of making the above-described optical bodies, and articles employing such optical bodies are also provided.