Raytracing Models for Diffractive Optical Elements

Abstract

Optical designers currently have several ways to model surface relief diffractive optical elements (DOE's) on the computer. We are aware of three distinct techniques: the phase model1,2, the Sweatt model3 and the Southwell model4. We will compare them for accuracy, applicability and ease of use. These models must perform two functions: a) Accurately simulate the performance of the DOE. b) Be translatable into information that will allow the physical part to be produced.