Radio-astronomy precedent for optical interferometer imaging

Details Radio-astronomy precedent for optical interferometer imaging Radio-astronomy precedent for optical interferometer imaging

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986josaa...3.1311s&link_type=abstract

Optical Society of America, Journal, A: Optics and Image Science (ISSN 0740-3232), vol. 3, Aug. 1986, p. 1311-1319.

Astronomy and Astrophysics

Astronomy

2

Image Correlators, Imaging Techniques, Interferometers, Optical Heterodyning, Radio Astronomy, Coherence, Fourier Transformation, High Resolution, Radio Interferometers, Very Large Array (Vla)

Scientific paper

The techniques used by radio astronomers to construct high-resolution images of cosmic sources from large-array or VLBI-network observations are reviewed; optical analogs are considered analytically; and the design and theoretical performance of a heterodyne optical/IR interferometer are presented. Consideration is given to the theory of radio interferometry, image synthesis, the CLEAN deconvolution algorithm for improving dirty images, phase closure, heterodyne-receiver interferometry, and the SNR obtainable at various wavelengths. Desiderata for optical/IR inteferometry include 1-GHz-bandwidth optical detectors which can be organized in arrays of 1000 or more, phase-stable local-oscillator signal-transmission methods, local oscillators capable of producing combs of 1000 monochromatic laser signals, an array of 500,000 or more signal correlators, and a 1-GHz-clock-rate digital delay-line system replicable for 27,000 detectors. Diagrams, graphs, and sample images are provided.

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