The optical model of a particle is developed for investigating the energy and polarization characteristics of light transmitted through a semitransparent oriented plate. The equations for scattering cross sections proportional to the corresponding parameters of the Stokes vector are obtained for any point of the forward hemisphere. These equations relate the physical parameters of the particle (dimensions, refractive index) and the parameters of the incident radiation (wavelength, state of polarization) to the characteristics of radiation transmitted through the crystal at different positions of the source, receiver, and the crystal.