Optical polarimetry based on geometric phase measurements: unitary Jones matrices.

We demonstrate a polarimetry technique based on geometric phase measurements. The technique can be used to obtain either the polarization state of a light beam or the properties of a polarizing optical system. On the one hand, we apply our method to determine the properties of homogeneous and unitary Jones matrices. On the other hand, we provide the recipe to measure the Stokes parameters of a light beam without requiring intensity projections.