Experiments on speckle imaging using projection methods

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Experiments on speckle imaging using projection methods

Conference Paper (2011)

Author(s)

M. Loktev (Flexible Optical B.V.)

G. Vdovin (Flexible Optical B.V.)

O. Soloviev (Flexible Optical B.V.)

S. Savenko (Flexible Optical B.V.)

Affiliation

External organisation

Image processing Imaging systems Atmospheric optics

DOI related publication

https://doi.org/10.1117/12.893462 Final published version

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https://resolver.tudelft.nl/uuid:1c55a5f6-df7f-4078-a543-2595271492f0

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Publication Year

2011

Language

English

Affiliation

External organisation

Article number

81650M

ISBN (print)

9780819487759

Event

Unconventional Imaging, Wavefront Sensing, and Adaptive Coded Aperture Imaging and Non-Imaging Sensor Systems (2011-08-21 - 2011-08-25), San Diego, CA, United States

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Abstract

In this paper we present some experimental results of speckle imaging for near-diffraction-limited observation of ground-based scenery and astronomical objects through atmospheric turbulence. The method of alternating projections onto convex sets is used for iterative reconstruction of the point-spread function (PSF), combined with Wiener filtering for deconvolution and several pre-processing techniques. A modification of the optical system with aperture segmentation is considered. The results of imaging on a horizontal path and astronomical imaging are reported and compared with time averaged and best frame images. Apparent image improvement is demonstrated in a field much wider than the isoplanatic patch size.