Simulation of Speckle in Optical Imaging

doi:10.1117/3.2644988.ch4

Book: Simulating Speckle with Mathematica^®

Author(s): Joseph W. Goodman

Published: 2022

https://doi.org/10.1117/3.2644988.ch4

Author Affiliations +

Abstract

In this chapter we examine methods for simulating speckle in optical imaging. Unlike the 1D examples in previous chapters, the simulations in this chapter will be two-dimensional, since images are 2D entities. Discrete models must be used in the simulations. Thus, the field complex amplitudes must be represented by discrete arrays, and therefore sampling is inherent in the simulation. An important question concerns the sampling density that must be used in the various cases, with the density chosen high enough to avoid aliasing. According to the sampling theorem, the required density depends on the bandwidth of the complex amplitude representation of the light leaving the rough surface or diffuser.