Simplified static holographic evaluation method omitting the zero-order fringe

A simplified static multi-interferogram evaluation method is proposed. With its aid the absolute fringe order number can be determined in the absence of the zero-order fringe. The method can be applied to measuring 3-D displacement due to static/dynamic load in industrial environments. Data needed for determining 3-D displacement are stored on four independent interferograms. The recording holographic interferometer is presented. An experimental investigation of a hydraulic press model has been performed to illustrate the effectiveness of the proposed technique.