时空光学相干（STOC）成像中的计算像差校正
Computational aberration correction in spatiotemporal optical coherence (STOC) imaging
摘要：
时空光学相干（STOC）成像是傅里叶域全视场光学相干层析成像（FD-FF-OCT）中抑制相干串扰噪声的一种新技术。在STOC成像中，时变非均匀相位掩模调制入射光以改变干涉信号。然后，如在标准FD-FF-OCT中那样处理所得干涉图像，并非相干地或相干地求平均以产生样品的无串扰体积OCT图像。在这里，我们表明，相干平均是合适的相位调制时，两个干涉仪臂同时进行。我们解释的优势，相干非相干平均。具体地说，我们表明，调制信号，相干平均后，保持横向相稳定性。这使得计算相位校正能够补偿几何像差。最终，我们采用它来纠正人类视网膜感光层图像中存在的像差，该像差揭示了不可见的感光马赛克。
英文摘要：
Spatiotemporal optical coherence (STOC) imaging is a new technique for suppressing coherent crosstalk noise in Fourier-domain full-field optical coherence tomography (FD-FF-OCT). In STOC imaging, the timevarying inhomogeneous phase masks modulate the incident light to alter the interferometric signal. Resulting interference images are then processed as in standard FD-FF-OCT and averaged incoherently or coherently to produce crosstalk-free volumetric OCT images of the sample. Here, we show that coherent averaging is suitable when phase modulation is performed for both interferometer arms simultaneously. We explain the advantages of coherent over incoherent averaging. Specifically, we show that modulated signal, after coherent averaging, preserves lateral phase stability. This enables computational phase correction to compensate for geometrical aberrations. Ultimately, we employ it to correct for aberrations present in the image of the photoreceptor layer of the human retina that reveals otherwise invisible photoreceptor mosaic.
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