Shift-and-Add Method with Optically Pre-Processed Stellar Specklegrams

Details Shift-and-Add Method with Optically Pre-Processed Stellar Specklegrams Shift-and-Add Method with Optically Pre-Processed Stellar Specklegrams

Sep 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996optrv...3..335k&link_type=abstract

Optical Review, Volume 3, Issue 5, pp.335-340

Physics

1

Stellar Speckle Interferometry, Shift-And-Add Method, Convolutional Pre-Processing, Incoherent Optical Processing

Scientific paper

We propose a simple optical approach for the convolutional pre-processing of stellar specklegrams in the shift-and-add (SAA) method. It uses an incoherent optical processing, where a speckle pattern on a displaying device is re-imaged and a point-spread-function of the re-imaging system is used as the convolution kernel. This approach is suitable for use in the real-time SAA-system recently proposed. Experimental results using observational stellar specklegrams displayed on a cathode-ray-tube-monitor are reported to demonstrate that the optical pre-processing improves the signal-to-noise ratio of the final image.

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