Depolarization of light can be measured by polarization-sensitive optical coherence tomography (PS-OCT) and has been used to improve tissue discrimination as well as segmentation of pigmented structures. Most approaches to depolarization assessment for PS-OCT – such as the degree of polarization uniformity (DOPU) – rely on measuring the uniformity of polarization states using spatial evaluation kernels. In this article, we present a different approach which exploits the spectral dimension. We introduce the spectral DOPU for the pixelwise analysis of polarization state variations between sub-bands of the broadband light source spectrum. Alongside a comparison with conventional spatial and temporal DOPU algorithms, we demonstrate imaging in the healthy human retina, and apply the technique for contrasting hard exudates in diabetic retinopathy and investigating the pigment epithelium of the rat iris.

中文翻译：

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偏振敏感OCT的光谱偏振均匀度

光的去偏振可以通过偏振敏感光学相干断层扫描 (PS-OCT) 来测量，并且已被用于改善组织辨别力以及色素结构的分割。PS-OCT 去极化评估的大多数方法——例如偏振均匀度 (DOPU)——依赖于使用空间评估内核测量偏振态的均匀性。在本文中，我们提出了一种利用光谱维度的不同方法。我们介绍了光谱 DOPU，用于对宽带光源光谱的子带之间的偏振态变化进行像素分析。除了与传统的空间和时间 DOPU 算法进行比较外，我们还展示了健康人类视网膜的成像，