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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 ...
While white light interferometry is not new, combining old interferometry techniques with modern electronics, computers, and software has produced extremely powerful measurement tools. Yuri Denisyuk and Emmett Leith , have done much in the area of white light holography and interferometry.
Figure 2. Path of light in Michelson interferometer. A Michelson interferometer consists minimally of mirrors M 1 & M 2 and a beam splitter M (although a diffraction grating is also used [3]). In Fig 2, a source S emits light that hits the beam splitter (in this case, a plate beamsplitter) surface M at point C.
Interference can also be seen in everyday phenomena such as iridescence and structural coloration. For example, the colours seen in a soap bubble arise from interference of light reflecting off the front and back surfaces of the thin soap film. Depending on the thickness of the film, different colours interfere constructively and destructively.
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
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.
In the experiment, light from a monochromatic slit source reflects from a glass surface at a small angle and appears to come from a virtual source as a result. The reflected light interferes with the direct light from the source, forming interference fringes. [2] [3] It is the optical wave analogue to a sea interferometer. [4]
A simple two-element optical interferometer. Light from two small telescopes (shown as lenses) is combined using beam splitters at detectors 1, 2, 3 and 4.The elements create a 1/4 wave delay in the light, allowing the phase and amplitude of the interference visibility to be measured, thus giving information about the shape of the light source.