multiple-beam interferometer

multiple-beam interferometer

[′məl·tə·pəl ¦bēm ‚in′tər·fə′räm·əd·ər]
(optics)
An interferometer in which a beam is reflected several times back and forth between a pair of parallel plane surfaces; examples are the Fizeau interferometer and the Fabry-Perot interferometer.
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