Quantitative phase reconstruction for orthogonal-scanning differential phase-contrast optical coherence tomography

TL;DR

This paper introduces a method for quantitative phase reconstruction in differential phase-contrast optical coherence tomography using orthogonal scanning and a mathematical algorithm, enabling accurate phase maps from two orthogonal images.

Contribution

It presents a novel combination of orthogonal DPC-OCT scanning with a shape from shading algorithm for precise phase mapping, advancing OCT imaging capabilities.

Findings

Successful phase reconstruction on technical samples

Accurate quantitative phase maps achieved

Enhanced directional phase gradient sensing

Abstract

We present differential phase-contrast optical coherence tomography (DPC-OCT) with two transversally separated probing beams to sense phase gradients in various directions by employing a rotatable Wollaston prism. In combination with a two-dimensional mathe- matical reconstruction algorithm based on a regularized shape from shading (SfS) method accurate quantitative phase maps can be determined from a set of two orthogonal en-face DPC-OCT images, as exemplified on various technical samples.