Abstract
Non-Gaussian speckle contrast from a phase-perturbed random object field in a spatially partially coherent system is simulated. A quasi-monochromatic extended incoherent source is modeled as a collection of independent point sources distributed on a regular grid. The source illuminates a phase screen object in a Kohler configuration. Speckle is calculated from the incoherent sum of irradiances in the image plane generated from the point sources. Simulated speckle contrasts are verified by an experiment with a fractallike rough surface distribution that is fabricated using a grayscale maskless lithography tool. Characteristics of the simulation method and physical quantities affecting speckle contrast are discussed.
© 2009 Optical Society of America
Full Article | PDF ArticleMore Like This
Dongyel Kang and Tom D. Milster
J. Opt. Soc. Am. A 26(12) 2577-2585 (2009)
Dongyel Kang, Eric Clarkson, and Tom D. Milster
Opt. Express 17(5) 3084-3100 (2009)
Junji Ohtsubo
Appl. Opt. 21(22) 4167-4175 (1982)