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Related to interferometer: laser interferometer, Michelson interferometer


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 ?
Before falling onto the skew-symmetric interferometer the incident neutron beam was collimated and monochromatized by the 220-Bragg reflection of a Si perfect crystal monochromator placed in the thermal neutron guide H25.
A new interferometer combining infrared light collected by two of the Very Large Telescope's four 8-meter telescopes in Paranal, Chile, has finally provided a view that's sharp enough.
The facility will be open for use by other UK businesses and will include a clean room equipped with leading-edge instrumentation such as a Taylor Hobson PGI 1240 nanometric profiler, a Talysurf CCI non-contact 3D surface profiler, a spectrophotometer, an atomic force microscope, and a laser interferometer.
A portable laser interferometer to perform measurements at a low first term maximum permissible error (MPE).
The measurement of the real part of the n-p coherent scattering length was performed at the National Institute of Standards and Technology (NIST) Center for Neutron Research (NCNR) Interferometer and Optics Facility using a triple-blade, single perfect crystal silicon neutron interferometer.
For their study of Achemar, the researchers used a recently installed interferometer at the Paranal Observatory in Chile.
Contract notice: Fizeau interferometer based surface analyzer.
All three test methods apply to thin films such as found in MEMS materials, which can be imaged using a non-contact optical interferometer.
After the Laser Interferometer Space Antenna, or LISA, is launched in 2008, it should detect these types of waves from black holes already merging.
LRAS3 provides precise far-target location by incorporating advanced Second Generation Forward Looking Infrared (FLIR) technology, a global positioning interferometer, an eye-safe laser range finder, a designator laser for guided weapons and a day video camera.
Delivery of a Large Aperture Fizeau Interferometer with 12 inches beam aperture.
The electron and hole recombine in the QD, emitting exactly one photon that is incident on an intensity interferometer with a 50/50 percent beamsplitter and photon counting detectors.