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Multimodal probe for optical coherence tomography epidetection and micron-scale indentation

机译:用于光学相干断层显像和微米级压痕的多峰探针

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We present a multimodal ferrule-top sensor designed to perform the integrated epidetection of Optical Coherence Tomography (OCT) depth-profiles and micron-scale indentation by all-optical detection. By scanning a sample under the probe, we can obtain structural cross-section images and identify a region-of-interest in a nonhomogeneous sample. Then, with the same probe and setup, we can immediately target that area with a series of spherical-indentation measurements, in which the applied load is known with a μN precision, the indentation depth with sub-μm precision and a maximum contact radius of 100μm. Thanks to the visualization of the internal structure of the sample, we can gain a better insight into the observed mechanical behavior. The ability to impart a small, confined load, and perform OCT A-scans at the same time, could lead to an alternative, high transverse resolution, Optical Coherence Elastography (OCE) sensor.
机译:我们提出了一种多峰套圈式传感器,该传感器设计用于通过全光学检测对光学相干断层扫描(OCT)深度轮廓和微米级压痕进行整合式外延检测。通过在探针下扫描样品,我们可以获得结构横截面图像并识别非均质样品中的感兴趣区域。然后,使用相同的探针和设置,我们可以立即通过一系列球形压痕测量来瞄准该区域,其中已知施加的载荷的精度为µN,压痕深度的精度为µm,最大接触半径为100微米由于样品内部结构的可视化,我们可以更好地了解观察到的机械行为。施加较小的有限载荷并同时执行OCT A扫描的能力可能会导致一种替代的高横向分辨率光学相干弹性成像(OCE)传感器。

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