OPTICAL INVESTIGATION OF THE VECTOR FIELD OF DIRECTORS IN THE L-C BOUNDARIED NEMATIC MEDIUM UNDER ELECTRIC-FIELDS AND MAGNETIC-FIELDS

We have measured both phase difference decrease delta between ordinary and extraordinary rays passing through liquid crystal cell and dielec tric constants epsilon of 4-trans-n-hexyl-cyclohekxylisothiocyanatoben zene (6CHBT). The results of the studies for different alignment and t hicknesses under various electric measuring and magnetic fields are pr esented. The exposed experimental technique and data processing allows K-11 and K-33 determination. Determination Theta(Z) is derived from c ontinuum theory so it is not purely experimental determination but sem iempirical method.