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At the shorter wavelengths used in infrared astronomy and optical astronomy it is more difficult to combine the light from separate telescopes, because the light must be kept coherent within a fraction of a wavelength over long optical paths, requiring very precise optics. Practical infrared and optical astronomical interferometers have only ...
There also exists some amateur radio astronomy digital interferometers, such as the ALLBIN of the European Radio Astronomy Club. As most radio astronomy interferometers are digital they do have some shortcomings due to the sampling and quantization effects as well as the need for much more computing power when compared to analog correlation.
Expected Future Performance of Astronomical Interferometers Interferometer and observing mode Waveband Limiting magnitude Minimum baseline (m) (un-projected) Maximum baseline (m) Approx. no. visibility measurements per year (measurements per night x nights used per year) Max ratio of no. phase / no. amplitude measurements
Interferometry typically uses electromagnetic waves and is an important investigative technique in the fields of astronomy, fiber ... Interferometers are devices that ...
Air-wedge shearing interferometer; Astronomical interferometer / Michelson stellar interferometer; Classical interference microscopy; Bath interferometer (common path) Cyclic interferometer
The Michelson stellar interferometer is one of the earliest astronomical interferometers built and used. The interferometer was proposed by Albert A. Michelson in 1890, following a suggestion by Hippolyte Fizeau .
The Laser Interferometer Gravitational-Wave Observatory (LIGO) is a large-scale physics experiment and observatory designed to detect cosmic gravitational waves and to develop gravitational-wave observations as an astronomical tool. [1]
Very-long-baseline interferometry (VLBI) is a type of astronomical interferometry used in radio astronomy. In VLBI a signal from an astronomical radio source, such as a quasar, is collected at multiple radio telescopes on Earth or in space. The distance between the radio telescopes is then calculated using the time difference between the ...