endoscope

Definition: Optical instrument used to view in inaccessible places e.g. inside human body, in confined spaces of buildings or machinery. * It uses a bundle of fibre optics arranged coherently to relay images from the objective at the far end to the eyepiece. * Cables running along the outside of the fibre-optic allow the operator to manipulate the fibre optic while light is led down non-coherent fibres in an outer layer of the fibre optic bundle.

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