High resolution speckle methods for overcoming image degradation caused by the atmosphere and telescope aberrations

Details High resolution speckle methods for overcoming image degradation caused by the atmosphere and telescope aberrations High resolution speckle methods for overcoming image degradation caused by the atmosphere and telescope aberrations

Jun 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986opten..25..706w&link_type=abstract

Optical Engineering (ISSN 0091-3286), vol. 25, June 1986, p. 706-711. DFG-supported research.

Astronomy and Astrophysics

Astronomy

12

Astronomical Photography, Image Resolution, Speckle Patterns, Astronomical Spectroscopy, Atmospheric Effects, Diffraction Limited Cameras, Holographic Interferometry, Image Correlators, Image Reconstruction, Masking, Very Long Base Interferometry

Scientific paper

Analytical techniques are described for using speckle interferometry (SI) obtain 0.03 arcsec resolution images of stellar objects. SI proceeds by computing the ensemble average power spectrum of all speckle interferograms, compensating for the photon bias in the spectrum and for the SI transfer function, and calculating the object autocorrelations from the object power spectrum. Techniques employed for holographic SI, speckle masking to obtain diffraction-limited images, and speckle spectroscopy are defined. Photon-counting techniques and autocorrelations and image reconstruction from long-baseline and multiple-mirror interferometry are also defined. Sample SI images are provided of numerous stellar objects, including the asteroids Juno and Amphitrite, Pluto and is moon Charon, spectroscopic and Hyades double stars, and the gravitational lens quasar PG 1115+080A.

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