Effective coherence length estimation of optical wavefronts

In adaptive optics, the measurement of spatial coherence length helps in deciding the optimum design parameters of a Shack Hartmann Sensor (SHS). Two methods of estimating the spatial coherence length of optical wavefronts are presented. The first method is based on counting the number of Hough peak...

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Bibliographic Details
Published in:arXiv.org 2009-11
Main Authors: Vyas, Akondi, Roopashree, M B, B Raghavendra Prasad
Format: Article
Language:English
Subjects:
Adaptive optics
Coherence length
Computer simulation
Data mining
Design parameters
Estimation
Monte Carlo simulation
Optical properties
Statistical analysis
Wave fronts
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Summary:In adaptive optics, the measurement of spatial coherence length helps in deciding the optimum design parameters of a Shack Hartmann Sensor (SHS). Two methods of estimating the spatial coherence length of optical wavefronts are presented. The first method is based on counting the number of Hough peaks in the wavefront. The second method is based on a simple data mining technique applied on the wavefronts. Optical wavefronts with different properties are simulated and used for statistical analysis. A comparison of the performance of the two methods is presented using Monte Carlo simulations. It is shown that both these methods can become efficient tools in estimating the effective coherence length of optical wavefronts.
ISSN:2331-8422