The authors in this publication present analytical and numerical models using wave optics to understand dynamic speckle, i.e., changes in the speckle pattern due to perturbations in the imaging system. Such perturbations are commonly introduced to sum the dynamic speckle patterns over the image capture time and produce a speckle free image. Different perturbation methods commonly used to reduce the speckle in images are modeled and their impact on the image quality is presented. The models agree well with previously reported experiments and present an important tool for furthering our understanding of speckle. Such simulations can help optimize the experimental setups to provide high-quality results with good repeatability.
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