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Distal scanning tethered OCT imaging capsule operating at 800 nm. (A) Capsule design schematic consisting of a ferrule, achromatic optics, reflector, micromotor, holders and enclosure. (B) Schematic of the achromatic optics which includes two achromatic doublets lenses and one diffractive lens. (C) Photograph of the tethered capsule assembly. (D) Zoomed-in photograph of the capsule.
