Results 281 to 290 of about 217,614 (319)
Double Bragg Interferometry [PDF]
Physical Review Letters, 2016 We employ light-induced double Bragg diffraction of delta-kick collimated Bose-Einstein condensates to create three symmetric Mach-Zehnder interferometers. They rely on (i) first-order, (ii) two successive first-order, and (iii) second-order processes which demonstrate the scalability of the corresponding momentum transfer.
Ahlers, H. +16 more
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Journal of the Optical Society of America A, 2018
When a parallel beam of light undergoes a discontinuous change in phase or in phase gradient in the central part of the beam, two wavefronts with a common border are formed. In this paper, we formulate the interference of two such wavefronts and show that conventional diffraction and interference are special cases of a generalized interference with ...
M. Taghi Tavassoly, Hamid Salvdari
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When a parallel beam of light undergoes a discontinuous change in phase or in phase gradient in the central part of the beam, two wavefronts with a common border are formed. In this paper, we formulate the interference of two such wavefronts and show that conventional diffraction and interference are special cases of a generalized interference with ...
M. Taghi Tavassoly, Hamid Salvdari
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Applied Optics, 1979
The generalized principle of moiré interferometry is explained theoretically. As a result it becomes clear that the application of incoherent moiré techniques to a two-beam interferometer enables measurement of wavefront deformation that is given by an object at two different times, but it cannot reduce distortion in a viewing system.
S, Yokozeki, S, Mihara
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The generalized principle of moiré interferometry is explained theoretically. As a result it becomes clear that the application of incoherent moiré techniques to a two-beam interferometer enables measurement of wavefront deformation that is given by an object at two different times, but it cannot reduce distortion in a viewing system.
S, Yokozeki, S, Mihara
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Optics Letters, 2005
We present a surprising modification of optical interferometry. A so-called spiral phase element in the beam path of a standard microscope results in an interferogram of phase samples, for which the interference fringes have the shape of spirals instead of closed contour lines as in traditional interferograms.
Severin, Fürhapter +3 more
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We present a surprising modification of optical interferometry. A so-called spiral phase element in the beam path of a standard microscope results in an interferogram of phase samples, for which the interference fringes have the shape of spirals instead of closed contour lines as in traditional interferograms.
Severin, Fürhapter +3 more
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SPIE Proceedings, 1990
The use of a two-frequency, Zeeman effect laser permits simple, stable, rapid, and highly accurate interferometry. There are a number of interesting applications. Three if them are discussed here.
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The use of a two-frequency, Zeeman effect laser permits simple, stable, rapid, and highly accurate interferometry. There are a number of interesting applications. Three if them are discussed here.
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Workshop on Optical Fabrication and Testing, 1986
The primary limitation of conventional phase-shifting or heterodyne interferometry (PSI) is its inability to measure the profile of surfaces or wavefronts with large departures from a best-fit reference sphere. The surface must have limited asphericity.
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The primary limitation of conventional phase-shifting or heterodyne interferometry (PSI) is its inability to measure the profile of surfaces or wavefronts with large departures from a best-fit reference sphere. The surface must have limited asphericity.
openaire +2 more sources