Effective coherence length estimation of optical wavefronts

Details Effective coherence length estimation of optical wavefronts Effective coherence length estimation of optical wavefronts

2009-11-04

arxiv.org/abs/0911.0818v1

XXXIV Symposium of OSI, ICOP, 2009

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

4 pages, 5 figures, in proceedings of the International Conference on Optics and Photonics, 2009

Scientific paper

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.

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