partial coherence

partial coherence

[′pär·shəl kō′hir·əns]
(physics)
Property of two waves whose relative phase undergoes random fluctuations which are not, however, sufficient to make the wave completely incoherent.
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References in periodicals archive ?
Accuracy and reproducibility of biometry using partial coherence interferometry.
The partial coherence of the light over the sample is determined by the Van Cittert-Zernike theorem (Born & Wolf, 2005) what stablish that the diameter of the area almost coherently illuminated is given by [D.
Technically, OCT is a partial coherence interferometer.
The author has organized the main body of his text in nine chapters devoted to random variables, random processes, first-order properties of light, the temporal and spatial coherence of optical waves, problems involving higher-order coherence, the effects of partial coherence in imaging systems, and a variety of other related subjects.
Advanced aero-acoustic measures including partial coherence techniques, orthogonal beam forming and deconvolution beam forming will be utilized to fully assess the noise emission of the landing gear.
Nevertheless, this kind of method is directly to use Fourier inversion algorithm for solving the approximate brightness temperature distribution, and ignores the visibility observation error caused by the antenna position errors, and partial coherence between the radiation sources and some other factors.
s] is the source coherence parameter, which is the degree of the partial coherence of the source laser beam at the transmitter.
If these precautions are not taken the theory of partial coherence may have to be used for the computations.
Beam wander, the theory of partial coherence of the source, and phase fluctuations are also covered.
Another effect of the initial Rosslyn validation was the development of a fully three-dimensional (3D) ray model that accommodates arbitrarily oriented building and terrain faces and provides results with full vector fields and, if desired, rays combined with full phase information, This model also allows the user to combine rays with no coherence, partial coherence or full coherence.
8) compared the keratometry results obtained with Scheimpflug camera imaging (Pentacam, Oculus, Germany), corneal topography, or partial coherence interferometer (PCI) for intraocular power calculations in cataract surgery.