A descriptive demonstration of the principles in the utilization of the two dimensional photoelasticimeter "TYPE ROBERT" is presented. This apparatus permits pointwise measures of the photoelastic chatacteristics in the bireferengerent materials. Two plate models are used to analyse the stress concentration effects around the hole, one in the state of plane stress, the other under the condition of distributed edge moments. For the latter case, stress freeze technique is adapted. Several slices are cut form the stress frozen model and photoelastically analysed. These same models are also analyzed by use of the finite element method. The photoelastic results show very good accordance with analytic solutions, while the finite element method looks less efficient for the particular problems treated.s treated.