Patent ID: 7623236
Filing Date: 2009-11-24
Classification: G01J

Abstract:
1. A spectroscopic polarimetry, comprising: a step of preparing a polarimetric spectroscope, where a first retarder, a second retarder and an analyzer, through which light under measurement passes in sequence, and a device for obtaining a spectral intensity of the light having passed through the analyzer are provided, the second retarder is arranged such that the direction of a principal axis of the second retarder disagrees with the direction of a principal axis of the first retarder, and the analyzer is arranged such that the direction of a transmission axis of the analyzer disagrees with the direction of the principal axis of the second retarder; a step of launching the light under measurement into the polarimetric spectroscope to obtain a spectral intensity; and an arithmetic step of obtaining a set of phase attribute functions of a measurement system, and also obtaining a parameter indicating a wavenumber-distribution of a state of polarization (SOP) of the light under measurement by the use of the above obtained spectral intensity, wherein the set of phase attribute functions is a set of functions defined by properties of the polarimetric spectroscope, and includes a function depending upon at least a first reference phase function (φ