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首页> 外文会议>Optical Coherence tomography and coherence domain optical methods in biomedicine XVII >Combining Gabor and Talbot bands techniques to enhance the sensitivity with depth in Fourier domain optical coherence tomography
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Combining Gabor and Talbot bands techniques to enhance the sensitivity with depth in Fourier domain optical coherence tomography

机译：结合Gabor和Talbot波段技术，以提高傅里叶域光学相干断层扫描的深度敏感性

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The purpose of this study was to show how to favorably mix two effects to improve the sensitivity with depth in Fourier domain optical coherence tomography (OCT): Talbot bands (TB) and Gabor-based fusion (GF) technique. TB operation is achieved by directing the two beams, from the object arm and from the reference arm in the OCT interferometer, along parallel separate paths towards the spectrometer. By changing the lateral gap between the two beams in their path towards the spectrometer, the position for the maximum sensitivity versus the optical path difference in the interferometer is adjusted. For five values of the focus position, the gap between the two beams is readjusted to reach maximum sensitivity. Then, similar to the procedure employed in the GF technique, a composite image is formed by edging together the parts of the five images that exhibited maximum brightness. The combined procedure, TB/GF is examined for four different values of the beam diameters of the two beams. Also we demonstrate volumetric FD-OCT images with mirror term attenuation and sensitivity profile shifted towards higher OPD values by applying a Talbot bands configuration.
机译：这项研究的目的是说明如何在傅里叶域光学相干断层扫描（OCT）中更好地混合两种效果以提高灵敏度和深度：Talbot带（TB）和基于Gabor的融合（GF）技术。 TB操作是通过将来自OCT干涉仪中物镜臂和参考臂的两束光沿着平行的分开的路径射向光谱仪而实现的。通过改变两束光在通向光谱仪的路径中的横向间隙，可以调整干涉仪中最大灵敏度与光程差的位置。对于聚焦位置的五个值，重新调整两个光束之间的间隙以达到最大灵敏度。然后，类似于GF技术中所采用的步骤，通过将五个图像中显示最大亮度的部分合并在一起来形成合成图像。针对两个光束的光束直径的四个不同值，检查了组合过程TB / GF。此外，我们还演示了通过应用Talbot波段配置，具有镜像项衰减和灵敏度曲线向较高OPD值偏移的体积FD-OCT图像。

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