Stellar speckle interferometry and speckle holography at low light levels

Details Stellar speckle interferometry and speckle holography at low light levels Stellar speckle interferometry and speckle holography at low light levels

Jan 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980spie..243..103w&link_type=abstract

In: Applications of speckle phenomena; Proceedings of the Seminar, San Diego, CA, July 29, 30, 1980. (A81-39439 18-35) Bellingha

Physics

Optics

2

Holographic Interferometry, Image Reconstruction, Speckle Patterns, Stellar Spectrophotometry, Astronomical Photography, Atmospheric Optics, Atmospheric Turbulence, Autocorrelation, Image Resolution, Telescopes

Scientific paper

A brief review of speckle interferometry and speckle holography techniques is presented, along with examples of each. The application of speckle interferometry to the observation of objects near a point source, i.e., the reconstruction of direct images from speckle interferograms, is discussed, as is the application of the technique for observing faint astronomical objects, such as galactic nuclei and quasars, by measuring the single photon events in speckle interferograms. The two types of measurements were performed using the ESO 3.6 m telescope and other telescopes. The techniques have been used to overcome atmospheric image degradation completely, making the resolution of the speckle measurements about 30 times higher than that of ordinary astrophotography. Speckle interferometry up to 14th magnitude has been achieved, and the measurements yielded high resolution autocorrelations of the objects. Direct images were deconvolved using the speckle holography technique.

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