Word Finder - interferometer

definition

Any of several instruments that use the interference of waves to determine wavelengths and wave velocities, determine refractive indices, measure small distances, temperature changes, stresses, and many other useful measurements.

For Terrestrial Planet Finder, five spacecraft, flying in formation about one kilometer apart, will function as an optical interferometer.

The Laboratory has an on-going program developing techniques such as the shearing interferometer, including data processing methods.

Furthermore, because virtually all materials change a solvents refractive index, the interferometer can detect samples containing no natural chromophores.

Step scan permits the separation of the dynamics of scanning the interferometer from the dynamics of the chemical event to be measured.

This process keeps the interferometer accurately aligned in real time, as the interferometer accurately aligned in real time, as the interferometer is scanning and also while it is idling between scans.

In a stellar interferometer, the light sources can be two stars, or light from opposite ends of a star along its diameter.

The tiny distortions are measured by means of a laser interferometer.

Chu has devised an atom interferometer based on this cooling process.

In contrast to other optical methods of the detection of Shear force interactions the fiber interferometer enables to measure the tip amplitude oscillation.

This requires rather fancy technology and very, very high precision measurement using what's now become known as interferometer.

By scanning a photodiode along a line across the beam reflected by the interferometer, a line array of ultrasound receivers is effectively synthesized.

He early directed his researches to the velocity of light and while in Cleveland invented his interferometer (see 14.693), which enabled him to measure distances by means of the length of light-waves.

Magnusson, is to introduce a thin film of the dye into one of the optical paths of a Michelson interferometer, and to determine the consequent displacement of the fringes.

Some other appliance in which interference with long difference of path is made use of, such as the interferometer of Fabry and Perot, or Lummer's plate (see Interference Of Light) .

Michelson, who has compared the theoretical widening with that found experimentally by means of his interferometer, had to use a somewhat more complicated expression for the comparison, as his visibility curve does not directly give intensities for particular frequencies but an integral depending on a range of frequency?

A Japanese space radio telescope, HALCA, works with radio telescopes on the ground to form an interferometer twice as big as Earth.

The echelon and interferometer serve only a limited purpose, but must be called into action when the detailed structure of lines is to be examined.

Puccianti, who measured it by the interferometer in the case of more than a hundred lines of different metals; he found its degree to differ much in different lines of the same spectrum.