Portable Microscopic Phase Retrieval System Using the Transport of Intensity Equation on Android Platform

The microscope used in the traditional phase retrieval method based on the transport of intensity equation (TIE) is not portable enough. In this paper, a microscopic phase retrieval software and hardware system with good portability, high precision and strong adaptability is designed under the Android system. The intensity images are captured by the system which uses a smart phone with a portable microscope, and controls the lifting and lowering of the stage through a high-precision motor. Then the self-designed Android application software calculate the phase of the obtained image by using TIE method. Finally, the effectiveness of the system is verified by simulation experiments and experimental measurements.