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

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