22 August 1980 Optical Processor For The Very Large Array (VLA) Radiotelescope: System Concept
Author Affiliations +
Proceedings Volume 0231, 1980 Intl Optical Computing Conf I; (1980) https://doi.org/10.1117/12.958831
Event: 1980 Technical Symposium East, 1980, Washington, D.C., United States
Abstract
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°. Experimental results demonstrating processor concepts are shown and a processor system design approach is described.
© (1980) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
I. Cindrich, I. Cindrich, C. C. Aleksoff, C. C. Aleksoff, J. R. Fienup, J. R. Fienup, L. E. Somers, L. E. Somers, } "Optical Processor For The Very Large Array (VLA) Radiotelescope: System Concept", Proc. SPIE 0231, 1980 Intl Optical Computing Conf I, (22 August 1980); doi: 10.1117/12.958831; https://doi.org/10.1117/12.958831
PROCEEDINGS
17 PAGES


SHARE
Back to Top