Special Section on Speckle-Based Metrology

Speckle noise reduction in digital holography by slightly rotating the object

[+] Author Affiliations
Jorge Herrera-Ramirez

Instituto Tecnológico Metropolitano, Calle 73 No 76A-354, Medellin 050034, Colombia

Diego Andrés Hincapie-Zuluaga

Instituto Tecnológico Metropolitano, Calle 73 No 76A-354, Medellin 050034, Colombia

Universidad Nacional de Colombia, Sede Medellin, School of Physics, A. A. 3840, Calle 59 A N 63-20, Medellin 050034, Colombia

Jorge Garcia-Sucerquia

Universidad Nacional de Colombia, Sede Medellin, School of Physics, A. A. 3840, Calle 59 A N 63-20, Medellin 050034, Colombia

Opt. Eng. 55(12), 121714 (Jul 14, 2016). doi:10.1117/1.OE.55.12.121714
History: Received April 29, 2016; Accepted June 23, 2016
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Abstract.  This work shows the realization of speckle reduction in the numerical reconstruction of digitally recorded holograms by the superposition of multiple slightly rotated digital holographic images of the object. The superposition of T uncorrelated holographic images reduces the contrast of the speckle noise of the image following the expected 1/T law. The effect of the method on the borders of the resulting image is evaluated by quantifying the utilization of the dynamic range or the contrast between the white and black areas of a regular die. Experimental results validate the feasibility of the proposed method.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Jorge Herrera-Ramirez ; Diego Andrés Hincapie-Zuluaga and Jorge Garcia-Sucerquia
"Speckle noise reduction in digital holography by slightly rotating the object", Opt. Eng. 55(12), 121714 (Jul 14, 2016). ; http://dx.doi.org/10.1117/1.OE.55.12.121714


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