Polarization-sensitive OCT (PS-OCT) derives image contrast from tissue birefringence. Here, we introduced triple-input polarization sensitive optical coherence tomography (TRIPS-OCT), a new polarimetric modulation and reconstruction strategy for depth-resolved tomographic birefringence imaging in-vivo. We modulated the polarization states between three repeated frames and enabled the reconstruction of the Mueller matrix at each location within the triple-measured frames. We demonstrated a 2-fold reduction of the birefringence noise floor compared to the conventional dual-input reconstruction method, and a 3-fold reduction of the measurement error of optic axis orientation in retinal imaging with the compensation of corneal retardance and diattenuation.
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