A general scheme for computation of photoelastic properties has been proposed using the well-established quantum ion dependent theory. The families under consideration are I-VII type ionic crystals and AB (2) type cross compounds. The calculated values of strain polarisability constant (lambda) for the crystals in these families are compared with the predicted values by some other workers as well as with the available experimental ones. The results of the present work are in much better agreement with the available experimental data than the earlier estimated ones. This formulation is proposed to extend for other families of similar nature and theoretical analysis of the properties of nano materials. The industrial applications are also suggested.