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首页> 外文会议>Optical Coherence tomography and coherence domain optical methods in biomedicine XIX >Master-Slave Optical Coherence Tomography for Parallel Processing, Calibration Free and Dispersion Tolerance Operation
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Master-Slave Optical Coherence Tomography for Parallel Processing, Calibration Free and Dispersion Tolerance Operation

机译：主-从光学相干断层扫描，用于并行处理，无标定和色散容限操作

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We present further improvements on the Master Slave (MS) interferometry method since our first communication. In this paper, we present more data collection and additionally demonstrate an important feature of the MS method, that of tolerance to dispersion. MS interferometry produces the interference of a selected point in depth based on principles of spectral domain (SD) interferometry, but without the need of a Fast Fourier transformation (FFT). The method can be used to directly produce en-face optical coherence tomography (OCT) images but also as a tool to accurately measure distances in low coherence interferometry for sensing applications. In the MS-OCT method, cross-correlation is applied to both methods of SD-OCT, spectrometer based (SP) or swept source (SS) OCT. The channelled spectrum provided by an OCT system is correlated with the signal produced by reading a stored mask. Several such masks can be used simultaneously. The masks operate as adaptive filters. Each mask (filter) determines recognition in the measured channelled spectrum delivered by the interferometer, of the pattern corresponding to each optical path difference to be recognized. The method presents net advantages in comparison with the classical method of producing axial reflectivity profiles by FFT: no need for resampling of data, possibility to tailor the trade-off between depth resolution and sensitivity. Here, using a swept source, the MS method is used to obtain axial reflectivity profiles, which are compared to the axial profiles obtained by calibration of data and FFT. The tolerance to dispersion of the MS method was assumed in but not demonstrated. Here, measurements are performed to demonstrate its axial resolution independence on dispersion.
机译：自从我们第一次交流以来，我们就主从（MS）干涉测量方法提出了进一步的改进。在本文中，我们将提供更多的数据收集，并另外展示MS方法的重要功能，即耐分散性。 MS干涉仪根据频谱域（SD）干涉仪的原理产生选定深度的点的干涉，但不需要快速傅立叶变换（FFT）。该方法不仅可以用于直接生成面部光学相干断层扫描（OCT）图像，而且还可以用作在传感应用中的低相干干涉测量中准确测量距离的工具。在MS-OCT方法中，互相关应用于SD-OCT，基于光谱仪（SP）或扫频源（SS）OCT的两种方法。 OCT系统提供的通道频谱与通过读取存储的掩码产生的信号相关。可以同时使用几个这样的面具。掩模用作自适应滤波器。每个掩模（滤波器）确定在由干涉仪传送的测量的通道频谱中对与要识别的每个光程差相对应的图案的识别。与通过FFT产生轴向反射率轮廓的经典方法相比，该方法具有净优势：无需重新采样数据，可以在深度分辨率和灵敏度之间进行权衡取舍。在这里，使用扫频光源，MS方法用于获得轴向反射率曲线，将其与通过数据校准和FFT获得的轴向曲线进行比较。假设但未证明MS方法对分散的耐受性。在这里，进行测量以证明其轴向分辨率与色散无关。

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