Gradient Refractive Index Polymers Produced in a Centrifugal Field

Transparent glasses with a refractive index gradient are useful in a variety of optical applications; however, their low-cost mass-production is difficult, and their stability is poor. Here is reported a new method for the preparation of these materials, whereby a centrifugally produced gradient in a solution of polymer-in-monomer is fixed by polymerization of the monomer. The Figure reflects the optical properties of the produced optical preforms.