Adaptive technique for phase noise reduction from the speckle correlation fringes

Phanindra Narayan Gundu; Erwin Hack; Pramod K. Rastogi

doi:10.1117/12.616554

10 September 2005 Adaptive technique for phase noise reduction from the speckle correlation fringes

Phanindra Narayan Gundu, Erwin Hack, Pramod K. Rastogi

Proceedings Volume 5908, Optical Information Systems III; 59080X (2005) https://doi.org/10.1117/12.616554
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

We show improvement in the signal-to-noise ratio of speckle correlation fringe patterns by providing a conjugate phase to the scattered object beam. This conjugate phase negates the speckle phase and will leave the speckle intensity as the only statistically varying quantity. Since one of the random variables is reduced the signal-to-noise ratio improves. The variation of intensity in the fringe profile is reduced after the adaptive phase correction. This improvement is vividly seen after a simple morphological filtering. The experiment is performed using a twisted nematic liquid crystal display SLM in transmission.

Citation Download Citation

Phanindra Narayan Gundu, Erwin Hack, and Pramod K. Rastogi "Adaptive technique for phase noise reduction from the speckle correlation fringes", Proc. SPIE 5908, Optical Information Systems III, 59080X (10 September 2005); https://doi.org/10.1117/12.616554

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