The design and construction of wide FOV imaging polarimeters for use
in atmospheric remote sensing requires significant attention to the
prevention of artificial polarization induced by the optical elements.
Surface, coatings, and angles of incidence throughout the system must
be carefully designed in order to minimize these artifacts because the
remaining instrumental bias polarization is the main factor which
drives the final polarimetric accuracy of the system. In this work, we
present a detailed evaluation and analysis to explore the possibility
of retrieving the initial polarization state of the light traveling
through a generic system that has inherent instrumental polarization.
Our case is a wide FOV lens and a splitter device. In particular, we
chose as splitter device a Philips-type prism, because it is able to
divide the signal in 3 independent channels that could be
simultaneously analyze to retrieve the three first elements of the
Stoke vector (in atmospheric applications the elliptical polarization
can be neglected ). The Philips-type configuration is a versatile,
compact and robust prism device that is typically used in three color
camera systems. It has been used in some commercial polarimetric
cameras which do not claim high accuracy polarization measurements
. With this work, we address the accuracy of our polarization
inversion and measurements made with the Philips-type beam divider.