In this paper, we proposed a random phase retrieval approach based on two differential interferograms and VU factorization. Firstly, three interferograms with arbitrary phase shifts are subtracted, and then two differential interferograms are obtained. On this basis, the phase related to the matrix is solved via VU factorization and the measured phase is obtained. Compared with the commonly used high-accuracy phase-shifting algorithms, this method does not require long-time iteration and approximate conditions, so…