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Proceedings Paper

Optical Processor For The Very Large Array (VLA) Radiotelescope: Aberration Analysis
Author(s): C. C. Aleksoff; L. E. Somers
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Paper Abstract

It is shown that an optical Fourier transform processor can convert VLA telescope visibility data at its input to a high accuracy ski-brightness map at its output. A particularly attractive Fourier transform processor that minimized the number of lens elements and hence potential background scattering sources is one for which the input is placed after the Fourier transform lens. This lens in its simplest form illuminates the input signal with a converging spherical wave. Such a system does not produce a perfect Fourier transform, but rather produces an aberrated one. The aberration is effectively analyzed as an error term within a Fourier transform integral. Error reduction techniques for the output map are described and numerical results from digital simulations are presented for the VLA A-array aperture.

Paper Details

Date Published: 22 August 1980
PDF: 11 pages
Proc. SPIE 0231, 1980 Intl Optical Computing Conf I, (22 August 1980); doi: 10.1117/12.958832
Show Author Affiliations
C. C. Aleksoff, Environmental Research Institute of Michigan (United States)
L. E. Somers, Lawrence Livermore Laboratory (United States)

Published in SPIE Proceedings Vol. 0231:
1980 Intl Optical Computing Conf I
William T. Rhodes, Editor(s)

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