(redirected from interferometry)
Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.


Any of several optical, acoustic, or radio-frequency instruments that use interference phenomena between a reference wave and an experimental wave or between two parts of an experimental wave to determine wavelengths and wave velocities, measure very small distances and thicknesses, and calculate indices of refraction.

in′ter·fer′o·met′ric (-fîr′ə-mĕt′rĭk) adj.
in′ter·fer′o·met′ri·cal·ly adv.
in′ter·fe·rom′e·try n.


1. (General Physics) physics any acoustic, optical, or microwave instrument that uses interference patterns or fringes to make accurate measurements of wavelength, wave velocity, distance, etc
2. (Astronomy) astronomy a radio or optical array consisting of two or more telescopes separated by a known distance and connected so that the radiation from a source in space undergoes interference, enabling the source to be imaged or the position of the source to be accurately determined
interferometric adj
ˌinterˌferoˈmetrically adv
ˌinterferˈometry n


(ˌɪn tər fəˈrɒm ɪ tər)

1. a device that splits light into two or more beams, usu. by reflection, and then brings them together to produce interference, used to measure wavelength, index of refraction, and astronomical distances.
2. an optical instrument for measuring the angular separation of double stars or the diameter of giant stars by means of the interference phenomena of light they emit.
in`ter•fer`o•met′ric (-ˌfɪər əˈmɛ trɪk) adj.
in`ter•fer`o•met′ri•cal•ly, adv.
in`ter•fer•om′e•try, n.


an instrument that measures wavelengths, minute distances, or the refractivity of lenses by comparison of interference patterns generated by the splitting and reuniting of a beam of light passed through a lens. — interferometry, n.
See also: Instruments
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.interferometer - any measuring instrument that uses interference patterns to make accurate measurements of waves
measuring device, measuring instrument, measuring system - instrument that shows the extent or amount or quantity or degree of something
References in periodicals archive ?
Oil reserves and diamond caches aren't the only buried structures that atom interferometers could find, says Lowell, program manager for atom interferometry applications at the Defense Advanced Research Projects Agency (DARPA), an arm of the military that supports speculative research.
They highlight new results and developments in such topics as neutron electric dipole moment searches, neutron optics and interferometry, Standard Model tests using neutron beta decay, neutron facilities, neutron polarimetry, and nucleon-nucleon interactions.
During his career, Newhall worked on spacecraft navigation and orbit determination, very-long- baseline interferometry and lunar laser ranging.
It was a major milestone in the development of optical interferometry --a technique that is ushering in a new era of extremely high-resolution astronomy.
Materials must be at least semi-transparent to be measured, as the new sensor will be based on white-light interferometry.
Speaking at an Entrepreneurial Mindset Conference at Wits University in Johannesburg on Monday, Science and Technology Minister Naledi Pandor, said : "Our partnership with the eight other African nations that will host remote stations of the SKA remains strong and we are developing with them, in preparation of the full SKA, a new African network of telescopes, the African Very-long Baseline Interferometry Network or AVN, adding that in the process, "we are making a valuable contribution to the training of the next generation of African scientists and engineers.
Subjects include: applications of optical interferometry to engineering measurements at different scales, laser detectors on atomic layer thermopile materials, long-period fiber-grating-based interferometers, examination and elimination of periodic error in heterodyne interferometry, and the condensed matter scheme for emergent gravity and interferometry.
To visualize the temperature field we used the method of holographic interferometry.
This technique is known as Differential SAR Interferometry (DInSAR).
The high-resolution images, which show NGC 1068 structures as small as 3 light-years across, are the first to be derived from infrared interferometry of any object outside our own galaxy, he notes.
In laboratory and industrial applications, interferometry enables extremely sensitive measurements of motion and distance.
The data collected there will produce a three-dimensional image of the ground's surface, a technique called interferometry.