17 February 2012 Multi-MHz FDML OCT: snapshot retinal imaging at 6.7 million axial-scans per second
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We demonstrate the acquisition of densely sampled wide-field 3D OCT datasets of the human retina in 0.3s. This performance is achieved with a multi-MHz Fourier domain mode-locked (FDML) laser source operating at 1050nm. A two-beam setup doubles the 3.35MHz laser sweep rate to 6.7MHz, which is 16x faster than results achieved with any non-FDML source used for retinal OCT. We discuss two main benefits of these high line rates: First, large datasets over an ultra-wide field of view can be acquired with a low probability of distortions. Second, even if eye movements occur, now the scan rate is high enough to directly correct even the fastest saccades without loss of information.
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Thomas Klein, Thomas Klein, Wolfgang Wieser, Wolfgang Wieser, Raphael André, Raphael André, Tom Pfeiffer, Tom Pfeiffer, Christoph M. Eigenwillig, Christoph M. Eigenwillig, Robert Huber, Robert Huber, } "Multi-MHz FDML OCT: snapshot retinal imaging at 6.7 million axial-scans per second", Proc. SPIE 8213, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XVI, 82131E (17 February 2012); doi: 10.1117/12.908798; https://doi.org/10.1117/12.908798

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