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The Twyman–Green interferometer, invented by Twyman and Green in 1916, is a variant of the Michelson interferometer widely used to test optical components. [58] The basic characteristics distinguishing it from the Michelson configuration are the use of a monochromatic point light source and a collimator.
White light interferometry is commonly used for detecting deformations of the wafer surface based on optical measurements. Low-coherence light from a white light source passes through the optical top wafer, e.g. glass wafer, to the bond interface.
SPIDER is an interferometric ultrashort pulse measurement technique in the frequency domain based on spectral shearing interferometry.Spectral shearing interferometry is similar in concept to lateral shearing interferometry, except the shearing is performed in the frequency domain.
The Twyman–Green interferometer, a double path interferometer, is a variant of the Michelson interferometer that is commonly used to test the precision of optical surfaces and lenses. [ 30 ] [ 31 ] Since reference and sample paths are divergent, this form of interferometer is extremely sensitive to vibration and to atmospheric turbulence in ...
Electronic speckle pattern interferometry (ESPI), [1] also known as TV holography, is a technique that uses laser light, together with video detection, recording and processing, to visualise static and dynamic displacements of components with optically rough surfaces. The visualisation is in the form of fringes on the image, where each fringe ...
Interferometry is a desired platform for precise estimation of physical quantities because of its ability to sense small phase changes. One of the most prominent examples of the application of this property is the detection of gravitational waves . Schematic of a conventional Mach-Zehnder interferometer.
Interferometry uses the principal of superposition to make measurements. The electron wave-packet is split into a superposition of two paths. Small differences in the paths will create a phase difference between each portion of the electron superposition.
A Fabry–Pérot interferometer differs from a Fabry–Pérot etalon in the fact that the distance ℓ between the plates can be tuned in order to change the wavelengths at which transmission peaks occur in the interferometer. Due to the angle dependence of the transmission, the peaks can also be shifted by rotating the etalon with respect to ...