Intensity interferometry: optical imaging with kilometer baselines

Dainis Dravins

doi:10.1117/12.2234130

26 July 2016 Intensity interferometry: optical imaging with kilometer baselines

Dainis Dravins

Proceedings Volume 9907, Optical and Infrared Interferometry and Imaging V; 99070M (2016) https://doi.org/10.1117/12.2234130
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

Optical imaging with microarcsecond resolution will reveal details across and outside stellar surfaces but requires kilometer-scale interferometers, challenging to realize either on the ground or in space. Intensity interferometry, electronically connecting independent telescopes, has a noise budget that relates to the electronic time resolution, circumventing issues of atmospheric turbulence. Extents up to a few km are becoming realistic with arrays of optical air Cherenkov telescopes (primarily erected for gamma-ray studies), enabling an optical equivalent of radio interferometer arrays. Pioneered by Hanbury Brown and Twiss, digital versions of the technique have now been demonstrated, reconstructing diffraction-limited images from laboratory measurements over hundreds of optical baselines. This review outlines the method from its beginnings, describes current experiments, and sketches prospects for future observations.

Citation Download Citation

Dainis Dravins "Intensity interferometry: optical imaging with kilometer baselines", Proc. SPIE 9907, Optical and Infrared Interferometry and Imaging V, 99070M (26 July 2016); https://doi.org/10.1117/12.2234130

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