Studying the Optical Characteristics of Poly-Methyl Methacrylate PMMA Films Doped With Fluorescein Eosin-Y Dye

In this paper, films of pure poly-methyl methacrylate PMMA and doped with Eosin-Y dye with (0.1 mm) thickness were prepared by solution casting technique. A (1 gm) of PMMA polymer in the shape of grain were solved in (100 ml) of chloroform. Eosin-Y dye added to the polymer in different concentration (10-4, 10-5,10-6mol/L). The optical properties (Absorbance, Transmittance, Reflectance) of the pure and doped films were studied by using the spectrometer in the range (200-800 nm). The optical constants: Absorption Coefficient, Refractive Index (n), Energy Gap (Eg), Extinction Coefficient (k), for pure of polymethyl methacrylate PMMA and doped by Eosin-Y dye were calculated. These studies have done to show the effect of adding the Eosin-Y dye on the optical properties of pure PMMA. The results show shifting to the visible area for the optical properties and decreasing in the optical constants after adding the dye