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An astronomical interferometer or telescope array is a set of separate telescopes, mirror segments, or radio telescope antennas that work together as a single telescope to provide higher resolution images of astronomical objects such as stars, nebulas and galaxies by means of interferometry.
A simple two-element optical interferometer. Light from two small telescopes (shown as lenses) is combined using beam splitters at detectors 1, 2, 3 and 4.The elements create a 1/4 wave delay in the light, allowing the phase and amplitude of the interference visibility to be measured, thus giving information about the shape of the light source.
The characteristics of the interference pattern depend on the nature of the light source and the precise orientation of the mirrors and beam splitter. In Fig. 2a, the optical elements are oriented so that S ′ 1 and S ′ 2 are in line with the observer, and the resulting interference pattern consists of circles centered on the normal to M 1 ...
This technique works by superposing ("interfering") the signal waves from the different telescopes on the principle that waves that coincide with the same phase will add to each other while two waves that have opposite phases will cancel each other out. This creates a combined telescope that is the size of the antennas furthest apart in the array.
The distance between the radio telescopes is then calculated using the time difference between the arrivals of the radio signal at different telescopes. This allows observations of an object that are made simultaneously by many radio telescopes to be combined, emulating a telescope with a size equal to the maximum separation between the telescopes.
Amazon addressed those concerns in a statement to CNN, saying one of the two prototype satellites it launched Friday will test antireflective technology aiming to mitigate telescope interference.
A deformable mirror can be used to correct wavefront errors in an astronomical telescope. In microscopy, adaptive optics is used to correct for sample-induced aberrations. [15] The required wavefront correction is either measured directly using wavefront sensor or estimated by using sensorless AO techniques.
A University of Toronto team created an algorithm to organize telescope data to weed out interference. The scientists claim this will help the search for an advanced extraterrestrial civilization ...