We extend further the performed early both theoretically and experimentally studies of the director distribution of a chiral nematic liquid crystal placed in a wedge-shaped cell with weak surface anchoring aimed to restore the actual surface anchoring potential. As a result of the present and previous experimental studies [1-3] it was found that the experimentally found surface potential (obtained from the measured potential derivative) is very nice fitted by a new model surface anchoring potential, the so called model D-potential (W-s(phi) = (W/2)phi(2)), in a wide angular range -/4< phi

Keywords:Surfaces anchoring;Cano-Grandjean wedge;polarization microscopy;restoration of surface anchoring potential