Friedericksz threshold in bipolar nematic droplets with rigidly fixed poles

We have studied experimentally a problem of the threshold behavior of Fried ericksz transition in bipolar nematic droplets with rigidly fixed poles. Th e dependence of the light transmission of the PDLC film on the applied volt age has obviously revealed a threshold for the straightforward passing beam , confirming the threshold behavior of reorientation process in a central p art of the droplet, which was theoretically predicted in [5]. In agreement with a simulation [5] the dependencies of scattering light intensity versus voltage have showed the non-threshold behavior. We have checked-up also th e interference origin of the oscillations of volt-contrast curves for these PDLC films. A number of oscillations and their amplitude depend on wavelen gth and films thickness.