Conference Proceedings
Refractive index profile determinations using a Lloyd's mirage
BE Allman, T Klein, KA Nugent, GI Opat
Proceedings of SPIE the International Society for Optical Engineering | SPIE - INT SOC OPTICAL ENGINEERING | Published : 1993
DOI: 10.1117/12.163661
Abstract
A novel method is presented for the experimental determination of refractive index profiles for planar media of monotonically decreasing refractive index, such as those used for optical waveguides. The technique is based upon a generalization of the classical experiment of Lloyd's Mirror, involving the interference pattern formed by a point source and its mirage, i.e., its reflection in such a graded planar medium.