Point-diffraction interferometer for radio telescopes

Taishi Okumura; Hiroaki Imada; Makoto Nagai; Tom Nitta; Naomasa Nakai; Nario Kuno

doi:10.1117/12.2233942

8 August 2016 Point-diffraction interferometer for radio telescopes

Taishi Okumura, Hiroaki Imada, Makoto Nagai, Tom Nitta, Naomasa Nakai, Nario Kuno

Proceedings Volume 9906, Ground-based and Airborne Telescopes VI; 990641 (2016) https://doi.org/10.1117/12.2233942
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

We propose a novel wavefront sensor for radio telescopes with a point diffraction interferometer. A point-like object is set at a pupil plane and the electric field at the focal plane is measured. A receiver dedicated to the novel sensor is prepared which has delay lines to make interferograms. A procedure to estimate the electric field at the pupil is shown analytically. Numerical simulation reveals that the proposed system allows us to measure the phase of the electric field at the pupil with a precision of about λ/28.

Citation Download Citation

Taishi Okumura, Hiroaki Imada, Makoto Nagai, Tom Nitta, Naomasa Nakai, and Nario Kuno "Point-diffraction interferometer for radio telescopes", Proc. SPIE 9906, Ground-based and Airborne Telescopes VI, 990641 (8 August 2016); https://doi.org/10.1117/12.2233942

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