Open AccessGeneration of fractal speckles by means of a spatial light modulator
Author(s) -
Hideki Funamizu,
Jun Uozumi
Publication year - 2007
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.15.007415
Subject(s) - optics , speckle pattern , spatial light modulator , fractal , diffuser (optics) , physics , diffraction , spatial frequency , light intensity , transmittance , light field , fresnel diffraction , ptychography , mathematics , light source , mathematical analysis
It was shown in previous studies that, when a diffuser is illuminated by coherent light with an average spatial intensity distribution obeying a negative power function, the scattered field in the Fraunhofer diffraction region exhibits random fractal properties. The method employed so far for producing such fields has a disadvantage in that generated speckle intensities are low due to small transmittance of fractal apertures used in the illumination optics. To overcome this disadvantage, a generation of fractal speckles by means of a spatial light modulator is proposed. The principle is explained and experimental results are also shown.