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. 2017 Feb 6;7:42209. doi: 10.1038/srep42209

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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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(a) 2-D optical layout highlights the achromatic doublets and the chamber for mounting the samples, and illustrates a pair of beams to provide dual-sided illumination to the samples. (b) 3-D layout of the imaging system reveals the individual optical components. M1-10: mirror; PH: pinhole; ND: neutral density filter; BE: beam expander; S: slit; CL1-2: cylindrical lens; L1-4: achromatic doublets; Ob1-2: objective.