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The Stokes I, Q, U and V parameters. The Stokes parameters are a set of values that describe the polarization state of electromagnetic radiation.They were defined by George Gabriel Stokes in 1851, [1] [2] as a mathematically convenient alternative to the more common description of incoherent or partially polarized radiation in terms of its total intensity (I), (fractional) degree of ...
Mueller calculus is a matrix method for manipulating Stokes vectors, which represent the polarization of light. It was developed in 1943 by Hans Mueller. In this technique, the effect of a particular optical element is represented by a Mueller matrix—a 4×4 matrix that is an overlapping generalization of the Jones matrix.
Degree of polarization (DOP) is a quantity used to describe the portion of an electromagnetic wave which is polarized. DOP can be calculated from the Stokes parameters. A perfectly polarized wave has a DOP of 100%, whereas an unpolarized wave has a DOP of 0%.
The Stokes parameters are sometimes denoted I, Q, U and V. The four Stokes parameters are enough to describe 2D polarization of a paraxial wave, but not the 3D polarization of a general non-paraxial wave or an evanescent field. [8] [9]
In optics, polarization mixing refers to changes in the relative strengths of the Stokes parameters caused by reflection or scattering—see vector radiative transfer—or by changes in the radial orientation of the detector.
Areas where the degree of polarization is zero (the skylight is unpolarized), are known as neutral points. Here the Stokes parameters Q and U also equal zero by definition. The degree of polarization therefore increases with increasing distance from the neutral points. These conditions are met at a few defined locations on the sky.
The four-component radiation vector, = (,,,) where I, Q, U and V are the first through fourth elements of the Stokes parameters, respectively, fully describes the polarization state of the electromagnetic radiation. It is this vector-nature that considerably complicates the equation.
Pages in category "Polarization (waves)" The following 78 pages are in this category, out of 78 total. ... Spin polarization; Stokes parameters; Sunstone (medieval) T.