Light-focusing plastic rod prepared from diallyl isophthalate-methyl methacrylate copolymerization

We have prepared a light-focusing plastic rod, having a parabolic refractive-index distribution, from a special and simple technique of diallyl isophthalate-methyl methacrylate copolymerization. The internal transmission loss at 6328-Å wavelength is 1.0 dB/m. The period of sine curved ray path through the rod and the constant of refractive-index gradient are 50 mm and 0.0158 mm−2, respectively. The 13-mm-long 3.35-mm-diam rod functions as a lens with a 38 ° 54′ field angle.