26 July 1993 Iterative recursive image reconstruction from the bispectrum
Author Affiliations +
Proceedings Volume 1983, 16th Congress of the International Commission for Optics: Optics as a Key to High Technology; 198354 (1993) https://doi.org/10.1117/12.2308603
Event: 16th Congress of the International Commission for Optics: Optics as a Key to High Technology, 1993, Budapest, Hungary
Abstract
The atmosphere degrades the angular resolution of astronomical observations with large telescopes dramatically. Instead of the theoretical resolution of, e.g., 0.04 arcseconds for a 3.6-m telescope at Ha only a value of about 1 arcsecond can be achieved in long exposure images. Short-time exposures (--, 20ms) consist of interference patterns. They are called speckle interferograms and contain the full resolution image information in convolved form. This full resolution information can be extracted from a set of speckle interferograms by bispectral analysis. One important step of this algorithm is the extraction of the object Fourier spectrum from the bispectrum, which is normally done by a recursive technique. This step can be improved using the iterative recursive reconstruction method, which is reported here. The degree of improvement has been investigated in a laboratory simulation.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
H. Weghorn, "Iterative recursive image reconstruction from the bispectrum", Proc. SPIE 1983, 16th Congress of the International Commission for Optics: Optics as a Key to High Technology, 198354 (26 July 1993); doi: 10.1117/12.2308603; https://doi.org/10.1117/12.2308603
PROCEEDINGS
2 PAGES


SHARE
Back to Top