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. 2017 Mar 3;7:43631. doi: 10.1038/srep43631

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Copyright © 2017, The Author(s)

This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/

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L₁–L₄: lens, M: Mirror, LF: laser line filter (Semrock, LL01-785-12.5), EF: edge filter (Semrock, Di02-R561), FC: fibre collimator (Thorlabs, F220FC_A), ND: neutral-density filter, OB₁: Mitituyo M Plan Apo, Magnification = 10x, NA = 0.23, WD = 20 mm, OB₂: Nikon CFI, Magnification = 60x, NA = 0.80, BS₁: fibre beam splitter (Thorlabs, FC532_50B_FC), BS₂: cube beam splitter, NF₁: notch filter (Semrock, NFD01-785-25x36), NF₂: notch filter (Semrock, NF03-785E), F/#: F-number matching optics, DET₁: CMOS camera (Imaging Source, DFK 42AUC03), DET₂: CCD camera (Andor Technology, Newton DU920P_DR).