In this work we have analysed the light scattering pattern produced by the cellulose derivative based PDLC type cells [1-5] when illuminated at normal incidence by a laser light beam. The voltage dependence of the scattering pattern was obtained along with the Voltage dependence of tile cells' transmission coefficient. Two different types of cells were studied, one assembled with films of hydroxypropylcellulose (HPC), and the other assembled with films of HPC and cellulose acetate (CA) (9.1% w/w), both cross linked and not. The presence of CA, which was seen to affect the films' surface increasing significantly its rugosity [6], is correlated with the scattering patterns obtained. The light scattering results are globally analysed in terms of their implications for the optimisation of electro-optical properties of these types of cells.