  In a dual-frequency liquid crystal (DFLC), when the frequency of the applied
voltage is more than a critical value ($f_c$), the dielectric anisotropy of the
material changes from positive to negative. This causes the director to switch
its orientation from parallel to the field (for $f < f_c$), to perpendicular to
it ($f > f_c$). Hence DFLC can be used in modulating the light by switching the
frequency of an externally applied voltage. We present in this work about
application of DFLCs in full Stokes polarimetery. A polarization modulator has
been worked out based on two DFLCs and two static retarders. The combination of
DFLCs' switching and static retarders are chosen such that more or less equal
weightage is given to all the Stokes parameters. Initial results on the
optimization of position angles of the modulators are presented towards the
goal of achieving polychromatic modulator in the wavelength range 600-900 nm.
