&lt;title&gt;Phase-diverse speckle reconstruction of solar data&lt;/title&gt;

Seldin, John H.; Paxman, Richard G.

doi:10.1117/12.188044

Cited by 34 publications

(37 citation statements)

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“…There are a variety of methods that have been developed over the years that take advantage of this observation, including speckle imaging [4,5] and deconvolution from wavefront sensing [6,7]. Among the more recent approaches are Multi-Frame Blind Deconvolution (MFBD) [1 , 8], and PhaseDiverse Speckle (PDS) [3,9,10,11]. The description of these data-collection and post-detection processing techniques will only be summarized here, and we refer the reader to the open literature cited above for further details.…”

Section: Algorithmsmentioning

confidence: 99%

<title>Multiframe blind deconvolution of infinite-extent objects</title>

Kampen

Paxman

1998

SPIE Proceedings

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Multi-Frame Blind Deconvolution (MFBD) has been shown to be useful for overcoming the blurring effects of turbulence-and instrument-induced aberrations in ground-based imaging of satellites. In this scenario, the object has a finite extent that is often entirely contained within the sensor fieldof-view. We report on the generalization of MFBD to accommodate objects that extend beyond the field of view (scenes) , as would be encountered, for example, in solar and planetary astronomy or in down-looking scenarios. We simulate both down-looking and up-looking scenarios, and vary parameters such as the level of scene illumination and the number of data realizations included. In the simulations, MFBD performance is evaluated by comparing results to the true scenes as well as to reconstructions using more established Phase-Diverse Speckle (PDS) techniques. Using real data, MFBD reconstructions of solar-granulation scenes are validated by comparison with well-accepted PDS results.

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Section: Algorithmsmentioning

confidence: 99%

<title>Multiframe blind deconvolution of infinite-extent objects</title>

Kampen

Paxman

1998

SPIE Proceedings

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“…Solar PD was independently developed by two teams (Löfdahl & Scharmer 1994a,b;Seldin & Paxman 1994), who used data from the Swedish Vacuum Solar Telescope (SVST) to establish PD as a reliable method for restoring solar data. A PD-restoration example (2005).…”

Section: Multi-frame Blind Deconvolutionmentioning

confidence: 99%

Modern solar facilities - advanced solar science

Kneer¹,

Puschmann²,

Wittmann³

2007

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“…This technique has been successfully used by some authors to determine aberrations Kendrick et al 1994;Lee et al 1997;Thelen et al 1999;Löfdahl et al 2000) and also to restore images, as in solar imaging through turbulence (Restaino 1992;Löfdahl & Scharmer 1994;Seldin & Paxman 1994). It uses a low-cost, optically simple wavefront sensor which consists in the imaging camera itself, but it requires a complex numerical and iterative processing to restore the unknowns from the images.…”

Section: Phase Diversity Principlementioning

confidence: 99%

Calibration of NAOS and CONICA static aberrations

Blanc

Fusco²,

Hartung

et al. 2003

A&A

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Abstract. We describe and evaluate the performance of a phase diversity wavefront sensor used to measure the static aberrations of the VLT instrument NAOS-CONICA. The main limitations of this phase diversity technique are compiled. We investigate the systematic errors due to the experimental implementation and the design restrictions. Further error sources stem from the imperfect knowledge of the system, and from limitations of the algorithm. The influence of these errors on the wavefront estimation is evaluated on numerical and experimental data. This study highlights the essential verifications and calibrations needed to obtain accurate results and gives a practical guideline for the application of a phase diversity wavefront sensor. The comprehensive calibration results and the final gain in optical performance are presented and discussed in a complementary paper (Hartung et al. 2003).

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<title>Phase-diverse speckle reconstruction of solar data</title>

Cited by 34 publications

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<title>Multiframe blind deconvolution of infinite-extent objects</title>

<title>Multiframe blind deconvolution of infinite-extent objects</title>

Modern solar facilities - advanced solar science

Calibration of NAOS and CONICA static aberrations

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