1. Super‐achromatic Optical Coherence Tomography Capsule for Ultrahigh‐resolution Imaging of Esophagus

    Super‐achromatic Optical Coherence Tomography Capsule for Ultrahigh‐resolution Imaging of Esophagus

    Endoscopic optical coherence tomography (OCT) is a noninvasive technology allowing for imaging of tissue microanatomies of luminal organs in real time. Conventional endoscopic OCT operates at 1,300 nm wavelength region with a sub‐optimal axial resolution limited to 8‐20 μm. In this paper we present the first ultrahigh‐resolution tethered OCT capsule operating at 800 nm and offering about 3‐4 fold improvement of axial resolution (plus enhanced imaging contrast). The capsule uses diffractive optics to manage chromatic aberration over a full ~200 nm spectral bandwidth centering around 830 nm, enabling to achieve super‐achromaticity and an axial ...

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