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Endoscopic forward viewing optical coherence tomography is analogous to conventional endoscopic views and can be achieved by resonant scanning of an optical fiber. Multi-beam endoscopic resonant scanning is demonstrated by a set of optical fibers mounted to a piezoelectric bender actuator and depth-multiplexed using a long coherence length swept laser at 200 kHz sweep rate and 8 mm imaging range. A compact translation mechanism adjusting the distance between the imaging fibers and lenses enabled the precise tuning of optical magnification. Scalable fields of view between 1.3 mm and 2.8 mm were demonstrated.
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