Research on gradient refractive index (GRIN) rod lens by three-step ion exchange processes

Abstract

Based on our previous work (Opt. Eng. 50 ( 7) 073402 ( 2011)), the diffusion equation in three step ion exchange processes is established, and the concentration ratio impact on the exchanged ion examines in detail. In addition, a theoretical model of the deviation of refractive index (RI) in the three-step ion exchange process is obtained and analyzed. The GRIN rod lens is prepared by three ion exchange processes, and the optical properties of the samples have been evaluated. The results show that the physical and chemical properties of GRIN rod lens in the three-step ion exchange process are better than those in the one-step and two-step ion exchange processes.