The scientists used yellow and red dye concentrators, either luminescent or pigmented, based on a tinted and luminescent acrylic glass known as polymethyl methacrylate (PMMA). For their testing ...

PMMA, polymethyl-methacrylate, is a thermoplastic acrylic linear polymer, the mer of which is illustrated in the diagram. PMMA is transparent, with a refractive index of 1.49, and easily formed into ...