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Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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Prism beamswitch for radio telescopes.

J M Payne1, B L Ulich

  • 1National Radio Astronomy Observatory, Tucson, AZ 85712, USA.

The Review of Scientific Instruments
|December 1, 1978
PubMed
Summary
This summary is machine-generated.

A novel dielectric prism and switching mechanism enable beamswitching for Cassegrain radio telescopes. This innovation allows for detailed mapping of extended radio sources with enhanced sensitivity and stability.

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Area of Science:

  • Radio Astronomy
  • Instrumentational Astronomy

Background:

  • Cassegrain radio telescopes are crucial for astronomical observations.
  • Mapping extended radio sources presents challenges due to potential confusion.

Purpose of the Study:

  • To develop a novel beamswitching mechanism for Cassegrain radio telescopes.
  • To improve the mapping capabilities for spatially extended radio sources.

Main Methods:

  • Construction of a dielectric prism and switching mechanism.
  • Integration with a Cassegrain radio telescope.
  • Utilizing a conventional Dicke radiometer for measurements.

Main Results:

  • Successful beamswitching of the Cassegrain radio telescope.
  • Demonstrated capability to map spatially extended radio sources.
  • Maintained high sensitivity and stability inherent in the Dicke radiometer.

Conclusions:

  • The developed dielectric prism and switching mechanism are effective for Cassegrain radio telescope beamswitching.
  • This technology allows for confusion-free mapping of extended radio sources.
  • The system leverages the inherent sensitivity and stability of Dicke radiometers for improved astronomical observations.