Real-time amplitude and phase integration for diffraction limited imaging discrete photon case

Details Real-time amplitude and phase integration for diffraction limited imaging discrete photon case Real-time amplitude and phase integration for diffraction limited imaging discrete photon case

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986spie..627..780h&link_type=abstract

IN: Instrumentation in astronomy VI; Proceedings of the Meeting, Tucson, AZ, Mar. 4-8, 1986. Part 2 (A87-36376 15-35). Bellingha

Astronomy and Astrophysics

Astronomy

1

Faint Objects, Image Reconstruction, Noise Spectra, Real Time Operation, Speckle Interferometry, Telescopes, Charge Coupled Devices, Fourier Transformation, Signal Detectors, Video Signals

Scientific paper

Both video raster detectors and newly developed two-dimensional photoelectron event locators are now employed to collect data at large astronomical telescopes for diffraction limited optical imaging by a number of speckle interferometric techniques. The Knox-Thompson (1974) algorithm is among the best understood of these techniques. The image amplitude and phase integrations required for its implementation can be accomplished directly in event-coordinate space (in the extreme photon-limited case) more efficiently than in the more conventional Fourier transform space. Hardware to accomplish the integrations required for Knox-Thompson image reconstruction in real-time at the telescope, alleviating the principal data processing bottleneck in the present applications of diffraction-limited astronomical imaging, are described.

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