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. 2019 Oct 10;9:14651. doi: 10.1038/s41598-019-50996-2

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© The Author(s) 2019

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Wavefront sensorless adaptive optics. (a) Sample photograph. (b) A-scans taken at the sample with different phase patterns applied. The depth-range from which the feedback signal for wavefront optimization is calculated is highlighted. (c) Flat wavefront applied to both beams for the acquisition of the initial scan. The pattern corresponds to a beam diameter of 4 mm at the SLM. (d) Wavefront optimized at the sample beam. (e) Wavefront optimized at the reference beam.