Speckle photography: mixed domain fractional Fourier motion detection

Opt Lett. 2006 Jan 1;31(1):32-4. doi: 10.1364/ol.31.000032.

Abstract

A reflection-based optical implementation of two simultaneous scale-invariant fractional Fourier transforms (FRTs) is used to develop a novel compact speckle photographic system. The system allows the independent determination of both surface tilting and in-plane translational motion from two sequential mixed domain images captured using a single camera.