Optical astronomical interferometry - Requirements on stellar Michelson interferometry and heterodyne interferometry for high-resolution imaging

Astronomy and Astrophysics – Astronomy

Scientific paper

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Imaging Techniques, Michelson Interferometers, Optical Measuring Instruments, Radio Astronomy, Radio Interferometers, Stellar Magnitude, Carbon Dioxide Lasers, Fourier Transformation, High Resolution, Infrared Interferometers, Optical Heterodyning

Scientific paper

The requirements for optical path compensation on space-based (no atmospheric-induced disturbance) heterodyne interferometers and generalized Michelson stellar interferometers are developed. It is demonstrated that heterodyne interferometers require optical path compensation to well within the coherence length dictated by its bandwidth, while Michelson stellar interferometers require compensation to a fraction of their utilized wavelength.

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