| Issue |
2010
|
|
|---|---|---|
| Article Number | 09006 | |
| Number of page(s) | 6 | |
| Section | Post processing | |
| DOI | https://doi.org/10.1051/ao4elt/201009006 | |
| Published online | 24 February 2010 | |
Statistics of undevelop ed speckles in partially polarized light
European Organization for Astronomical Research in the Southern Hemisphere (ESO)
Karl Schwarzschildstr. 2, D-85748 Garching b. Muenchen, Germany
a e-mail: nyaitsko@eso.org
We obtain an expression for the probability density function (PDF) of partially developed speckles formed by light with an arbitrary degree of polarization. From the probability density we calculate the detection threshold corresponding to the 5σ confidence level of a normal distribution. We show that unpolarized light has an advantage in high contrast imaging for low ratios of the deterministic part of the point spread function (DL PSF) to the halo, typical in coronagraphy.
© Owned by the authors, published by EDP Sciences, 2010