2 December 1988 Two-Dimensional Infrared Astronomical Speckle Interferometry
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Abstract
The infrared imager currently in use at the National Optical Astronomy Observatories (NOAO) has been adapted for use as a two-dimensional infrared speckle camera operating at wavelengths of 1μm 5μm. Data have been obtained at the Kitt Peak National Observatory (KPNO) Mayall telescope (effective aperture ti 3.8m) for a number of different sources. Diffraction-limited images are presented for two objects, the "Red Rectangle" and NML Cygnus, using the Knox-Thompson algorithm to recover the Fourier phases. A comparison of phase-relaxation techniques applied to the integrated phase differences is presented using both the Hudgin method and successive over-relaxation.
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Julian C. Christou, Jacques M. Beckers, Jonathan D Freeman, Stephen T Ridgway, Ronald G. Probst, "Two-Dimensional Infrared Astronomical Speckle Interferometry", Proc. SPIE 0976, Statistical Optics, (2 December 1988); doi: 10.1117/12.948546; https://doi.org/10.1117/12.948546
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KEYWORDS
Speckle

Spatial frequencies

Infrared cameras

Phase measurement

Cameras

Statistical optics

Signal to noise ratio

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