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Figure 1. The light path through a Michelson interferometer.The two light rays with a common source combine at the half-silvered mirror to reach the detector. They may either interfere constructively (strengthening in intensity) if their light waves arrive in phase, or interfere destructively (weakening in intensity) if they arrive out of phase, depending on the exact distances between the ...
From a book published in 1807 relating lectures given by Young in 1802 to London's Royal Institution. While studying medicine at Göttingen in the 1790s, Young wrote a thesis on the physical and mathematical properties of sound [4] and in 1800, he presented a paper to the Royal Society (written in 1799) where he argued that light was also a wave motion.
Figure 3. Formation of fringes in a Michelson interferometer This photo shows the fringe pattern formed by the Michelson interferometer, using monochromatic light (sodium D lines). As shown in Fig. 3a and 3b, the observer has a direct view of mirror M 1 seen through the beam splitter, and sees a reflected image M' 2 of mirror M 2.
Figure 1: Schematic layout of a White-light Interferometer. A CCD image sensor like those used for digital photography is placed at the point where the two images are superimposed. A broadband “white light” source is used to illuminate the test and reference surfaces. A condenser lens collimates the light from the broadband light source.
Because the frequency of light waves (~10 14 Hz) is too high for currently available detectors to detect the variation of the electric field of the light, it is possible to observe only the intensity of an optical interference pattern. The intensity of the light at a given point is proportional to the square of the average amplitude of the wave.
Grating-Coupled Interferometry schematics. GCI is based on phase-shifting waveguide interferometry.Light of the sensing arm of the interferometer is coupled into a monomode waveguide through a first grating, and undergoes a phase change until it reaches a second grating, depending on the local refractive index within the evanescent field (see image).
Both arms of the interferometer were contained in a transparent solid . The light source was a Helium–neon laser. ~7 km/s Trimmer et al. [30] [31] 1973: They searched for anisotropies of the speed of light behaving as the first and third of the Legendre polynomials. They used a triangle interferometer, with one portion of the path in glass.
Watson interferometer (microscopy) White-light interferometer (see also Optical coherence tomography, White light interferometry, and Coherence Scanning Interferometry) White-light scatterplate interferometer (white-light) (microscopy) Young's double-slit interferometer; Zernike phase-contrast microscopy