Information Retrieval from Atmospheric Induced Speckle Patterns

Korff, D.; Dryden, Gordon L.; Miller, Merlin G.

doi:10.1016/0030-4018(72)93000-3

Cited by 79 publications

(6 citation statements)

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“…Here, we adopt an approximation for the transfer function: (Korff et al 1972), where 〈P i ðuÞ〉 and T ðuÞ are the longexposure and the diffraction-limited transfer functions, respectively, and D and r 0 are the telescope's diameter and the seeing correlation diameter, respectively. Under this approximation, equation (2) is rewritten as…”

Section: Data Processing and Resultsmentioning

confidence: 99%

Image Restoration of Io by Shift-and-Add Method and Deconvolution

Kuwamura

Tsumuraya²,

Miura

et al. 2008

PUBL ASTRON SOC PAC

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ABSTRACT. Atmospheric turbulence degrades the image resolution of a ground-based telescope, and a speckle imaging technique can restore the image with high resolution up to the diffraction limit. We have obtained the speckle data of Io (a Jupiter's satellite) using the 2 m telescope in Nishi-Harima Astronomical Observatory. The speckle data are reduced by the shift-and-add method followed by a background-subtraction procedure. The reduced image is then deconvolved by the similarly reduced image of the unresolved binary star HR6168. The comparison with the close-up image taken by the Voyager 2 spacecraft reveals that the restored image shows well-resolved structural features on the surface of Io.

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Section: Data Processing and Resultsmentioning

confidence: 99%

Image Restoration of Io by Shift-and-Add Method and Deconvolution

Kuwamura

Tsumuraya²,

Miura

et al. 2008

PUBL ASTRON SOC PAC

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“…One must therefore rely on theoretical models of the MTF . Most of the observers use the fact, demonstrated by Korff et al . [14], that in the strong turbulence limit the high frequency tail of the MTF is proportional to the pupil autocorrelation function [15] . The accuracy of this approximation depends on the ratio D/ro of the telescope pupil diameter over Fried's turbulence parameter ro . Under usual seeing conditions it gives a reasonable description of the highest spatial frequencies observed through a large telescope in the visible range (D/r o^_-50) .…”

Section: Introductionmentioning

confidence: 98%

Modulation Transfer Function for Infra-red Stellar Speckle Interferometry: Evidence for a Log-normal Statistic

Chelli

Léna

Roddier³

et al. 1979

Optica Acta: International Journal of Optics

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“…However, if a short exposure (<0.05 seconds) image is taken of a bright astronomical point source, it is found to consist of many bright spots -speckles -spread over the area defined by the long exposure image (see Figure la). Labeyrie (1970) and many subséquent authors (e.g. Korff, Dryden and Miller 1972;Korfif 1973;Dainty 1974;Roddier 1974;Lynds et al 1975) hâve shown that thèse speckles are of a size similar to that of the diffraction limited image (the Airy disk).…”

Section: Introductionmentioning

confidence: 99%