Calibration of a collinear backscattering Mueller matrix imaging system

A collinear backscattering Mueller matrix (CBMM) imaging system has clear advantages in the detection of bulk biological tissues, which are highly scattering and depolarizing. Due to double-pass configuration noise system, calibration a is usually complex poor accuracy. In this work, we propose an alternative modified eigenvalue method (ECM) based on equivalent standard sample. For better suppression higher accuracy, design distribution polarization states over Poincaré sphere solve for parameters samples by means optimization. Compared other variants used accuracy proposed improved more than 40 times. The comparison results with error model-based methods indicate that generally gives best precision, as well reliability.