Mathematics – Complex Variables
Scientific paper
Jan 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980spie..231...38c&link_type=abstract
In: 1980 International Optical Computing Conference, Washington, DC, April 8-11, 1980, Proceedings. Book 1. (A81-37755 17-35) Be
Mathematics
Complex Variables
Antenna Arrays, Fourier Transformation, Image Reconstruction, Optical Data Processing, Radio Telescopes, Very Large Array (Vla), Visibility, Astronomical Photography, Complex Variables, Image Processing, Sky Brightness, Spatial Distribution
Scientific paper
Optical Fourier transform processing of radiotelescope visibility function data is reviewed. Emphasis is placed on the aspects of the processor design that arise from the unusual characteristics of the data. The complex visibility function is available only over a partially filled aperture consisting of a set of elliptical paths. It is recorded at the input to the optical processor on a carrier frequency as a real nonnegative transmittance. Since a bipolar sky brightness function output is to be computed, the output of the optical Fourier transform channel is mixed with a reference beam and the difference is taken of two successive measurements differing in reference phase by 180 deg. Experimental results demonstrating processor concepts are shown and a processor system design approach is described.
Aleksoff C. C.
Cindrich I.
Fienup James R.
Somers L. E.
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