an astronomical technique in which the images from two or more telescopes are superimposed. Interferometry has many uses, and one of the most intriguing is its ability to cancel out the light from a point source such as a star by superimposing the images in such a way that the oscillations in light intensity from one image are the reverse of the oscillations from the other image. With this method, planets orbiting the star can be directly observed, and the composition of their atmospheres can be investigated using spectral analyses. Note that this has not yet been accomplished as of summer 2000.
Measurement of distances or movements by means of the phenomena caused by the interference of two rays of light (optical interferometry) or of sound (acoustic interferometry).
The production and measurement of interference from two or more coherent wave trains emitted from the same source
Technique in widespread use to dramatically improve the resolution of radio and infrared maps. Several telescopes observe an object simultaneously, and a computer analyzes how the signals interfere with one another to reconstruct a detailed image of the field of view.
the use of interference phenomena of light waves to measure distances and angles between objects.
Technique where light is collected by two or more separated collectors such as radio antennas or telescope mirrors and then correlated. It is generally used to improve the resolution of a source.
A method for increasing resolving power by combining light obtained by two or more telescopes.
Technique in widespread use to dramatically improve the resolution of telescopes, especially radio telescopes. Several radio telescopes observe the object simultaneously, and a computer analyzes how the signals interfere with each other.
In interferometry, the data from two separate telescopes are used silmutaneouly to create a very good image (much better than either telescope alone).
Technique for manipulating patterns of interference between coherent beams generated from a specific device.
a technique of observation which consists in the superimposion of two sheaves of electromagnetic waves that come from the same source, but are detected by two or more separate instruments. Their superimposion can determine a strengthening or an attenuation of the intensity of the light; one can obtain different information about the source by studying the images obtained, such as for example its angular dimensions.
The use of interference phenomena for purposes of measurement. In radar, one use of interferometric techniques is to determine the angle of arrival of a wave by comparing the phases of the signals received at separate antennas or at separate points on the same antenna. Another interferometric application is to shape and steer the beams of phased- array antennas by adjusting the phases of the different elements of the array.
Experimental technique making use of an interferometer to measure a physical parameter.
Interferometry is the science and technique of superposing (interfering) two or more waves, which creates an output wave different from the input waves; this in turn can be used to explore the differences between the input waves. Because interference is a very general phenomenon with waves, interferometry can be applied to a wide variety of fields, including astronomy, fiber optics, optical metrology, oceanography and various studies of quantum mechanics. Interferometry can be applied to both one-dimensional waves such as time varying signals, or to mutli-dimensional waves such as coherent images produced by laser illumination.