Elisabeth F. Brunner,1 Iuliia Shatokhina,2 Muhammad Faizan Shirazi,1 Wolfgang Drexler,1 Christoph K. F. Hitzenberger,1 Rainer A. Leitgeb,1 Ronny Ramlau,2 Michael Pircher1
1Medizinische Univ. Wien (Austria) 2Johannes Kepler Univ. Linz (Austria)
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An adaptive optics optical coherence tomography (AO-OCT) system with a 3-sided pyramid wavefront sensor (P-WFS) is presented. Compared to the Shack-Hartmann WFS, the P-WFS promises better sensitivity in low-light scenarios and greater flexibility in pupil sampling. Key feature of the presented set-up is that part of the imaging light is used to illuminate the WFS. The double pass enables closed loop correction without beam modulation and speckle patterns in the sensor read-out are averaged out during scanning. The developed instrument is demonstrated with retinal images obtained in-vivo, where the cone mosaic is clearly visualized at ~4° eccentricity from the fovea.
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Elisabeth F. Brunner, Iuliia Shatokhina, Muhammad Faizan Shirazi, Wolfgang Drexler, Christoph K. F. Hitzenberger, Rainer A. Leitgeb, Ronny Ramlau, Michael Pircher, "In-vivo demonstration of AO-OCT with a 3-sided pyramid wavefront sensor (Conference Presentation)," Proc. SPIE 11218, Ophthalmic Technologies XXX, 112180R (9 March 2020); https://doi.org/10.1117/12.2549506