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. 2020 Mar 31;11(4):2277–2297. doi: 10.1364/BOE.388360

Fig. 1.

Fig. 1.

Schematic view of the experimental setup. Light scattering dectection was added to a commercial microscope. The illumination part was composed of a laser (850nm) attenuated (neutral density) and narrowed (L1 and L2). The detection part was composed of two lenses L3 and L4 positioned so that the front focal plane of L3 is imaged on the CCD2 camera.