Design of a three-channel pixelated phase mask and single-frame phase extraction technique

The pixelated phase mask (PPM) is a crucial component of the division-of-focal-plane (DoFP)-type polarization camera that is commonly used in simultaneous phase-shift interferometry. However, the traditional PPM has room for improvement in terms of the sampling rate and redundant channel information utilization due to its fixed layout and angle selection. In this work, a three-channel pixelated phase mask (TC-PPM) layout mode is proposed for the device structure improvement to further enhance the sampling rate and information utilization of the conventional PPM. Based on this, a corresponding fast-phase extraction formula for single-frame PPM interferograms is derived. The TC-PPM layout mode reduces the processing complexity of the device and uniformly increases the information sampling rate. The derived TC-PPM-based N-point average phase extraction formula can simply and efficiently correct and suppress the pixel mismatch errors and the random errors introduced by this device. The simulation and experimental results indicate that the TC-PPM scheduling model and its accompanying fast-phase extraction technique outperform mainstream PPMs by suppressing errors and improving the phase reconstruction accuracy.