22 August 1980 Optical Processor For The Very Large Array (VLA) Radiotelescope: Aberration Analysis
Author Affiliations +
Proceedings Volume 0231, 1980 Intl Optical Computing Conf I; (1980) https://doi.org/10.1117/12.958832
Event: 1980 Technical Symposium East, 1980, Washington, D.C., United States
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.
© (1980) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
C. C. Aleksoff, C. C. Aleksoff, L. E. Somers, L. E. Somers, } "Optical Processor For The Very Large Array (VLA) Radiotelescope: Aberration Analysis", Proc. SPIE 0231, 1980 Intl Optical Computing Conf I, (22 August 1980); doi: 10.1117/12.958832; https://doi.org/10.1117/12.958832


Back to Top