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Computational aberration correction in spatiotemporal optical coherence (STOC) imaging

机译:时空光学相干性的计算像差校正(STOC)成像

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Spatiotemporal optical coherence (STOC) imaging is a new technique for suppressing coherent cross talk noise in Fourier-domain full-field optical coherence tomography (FD-FF-OCT). In STOC imaging, the time-varying 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 cross-talk-free volumetric optical coherence tomography (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, enabling 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 mosaics. (C) 2020 Optical Society of America
机译:时空光学相干(STOC)成像是用于傅立叶域全视野光学相干断层扫描(FD-FF-OCT)抑制相干串扰噪声的新技术。在STOC成像中,时变的不均匀相掩模调制入射光以改变干涉信号。然后将产生的干扰图像如标准FD-FF-OCT中处理并平均不相干或相干以产生样品的无偶可传离的体积光学相干断层扫描(OCT)图像。这里,我们表明,当同时对两个干涉仪臂执行相位调制时,相干平均是合适的。我们解释了一致性对通电话的优点。具体地,我们示出了调制信号,在相干平均保持横向相位稳定性之后,使得能够计算阶段校正以补偿几何像差。最终,我们使用它来纠正存在于人视网膜的感光层的图像中存在的像差,所述人视网膜的图像露出不可见的光感受器马赛克。 (c)2020美国光学学会

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