Patent ID: 6177995
Filing Date: 2001-01-23
Classification: G01J

Abstract:
A polarimeter (1,31) comprising:an initial separator designed for separating an incident beam of light to be measured with a Stokes vector into a reflected beam and a transmitted beam, whereas the said separator has a reflection coefficient, a couple of ellipsometric angles in reflection, a transmission coefficient and a couple of ellipsometric angles in transmission,two final separators designed for separating respectively each of the reflected and transmitted beams into at least two final beams,means for detection designed for measuring the intensities of the final beams, anda processing unit linked to the means of detection, producing the Stokes vector of the light to be measured,wherein the initial separator comprises a prism that does not induce any interference effect and having properties, notably such a refraction index and a configuration that the transmitted beam undergoes at least one reflection internal to the said prism according to an angle of internal reflection.