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Two-beam holographic microscope for field use. (A) Schematic of the shared optical path design, as described by Wallace et al. (2015). (B) A fieldable version containing onboard computer and electronics. (C) Deployed in a sackhole for examination of sea ice brines in Kobbefjord, Greenland (this instrument and setup were used in the collection of the data for Fig. 5 in this paper).
