1. A Microscope in a Needle

    A Microscope in a Needle

    A microscope small enough to fit into a needle creates many new possibilities for optics in medicine. We have developed a range of optical coherence tomography (OCT) needle probes. Connected to an OCT scanner via a single mode fiber, the probes are constructed by fusing exact lengths of no-core fiber and graded-index fiber to focus a broadband light beam. We terminated the optics with anglepolished, gold-coated no-core fiber to deflect the beam. Encased in a needle (outer diameter 310 ?m), these probes are capable of 3-D imaging. However, the important developments of 2012 have been where we have taken these ...

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