On the evaluation of the true phase of interferograms

Abstract

An iterati¨e technique that uses sine and cosine modulations along with low-pass filtering to extract the true phase¨alues of a carrier frequency interferogram is proposed in this paper. An illustrati¨e example is gi¨en in which this technique is applied. Results generated from the application of this technique are compared with exact phasëalues, and excellent agreement between the exact and computed phasë alues is demonstrated. ᮊ