“…Usually Pin*, P,, < P,, P , holds and we denote the sum of the components along the polar z-axis of the latter two by Po. If we insert (5) into (4), several contribution are obtained, from which only the following two are relevant here: the birefringence contribution -(n3/2) g , & , already mentioned and the spatially where P,, is related to the space charge amplitude e spatially modulated in the x-y-plane via iKP,, = Q , where i denotes the imaginary unit (for more details see [9]). Given the intensity I , of the isotropically scattered light intensity in direction k, the anisotropically scattered intensity can be estimated from ?t cos (9,/2)…”