Share Email Print

Proceedings Paper

Adaptive technique for phase noise reduction from the speckle correlation fringes
Author(s): Phanindra Narayan Gundu; Erwin Hack; Pramod K. Rastogi
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper 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.

Paper Details

Date Published: 10 September 2005
PDF: 7 pages
Proc. SPIE 5908, Optical Information Systems III, 59080X (10 September 2005);
Show Author Affiliations
Phanindra Narayan Gundu, EMPA--Swiss Federal Labs. for Materials Testing and Research (Switzerland)
Erwin Hack, EMPA--Swiss Federal Labs. for Materials Testing and Research (Switzerland)
Pramod K. Rastogi, Swiss Federal Institute of Technology Lausanne (Switzerland)

Published in SPIE Proceedings Vol. 5908:
Optical Information Systems III
Bahram Javidi; Demetri Psaltis, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?