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. 2017 Apr 18;12(4):e0175766. doi: 10.1371/journal.pone.0175766

Fig 1. Schematic of the 8-spot single-molecule FRET setup.

Fig 1

A freely-diffusing single molecule sample is probed via 8 independent excitation spots generated by a 532 nm CW laser and an LCOS spatial-light modulator. The fluorescent signal from each excitation spot is optically conjugated to a pair of pixels in the two detectors. The donor and acceptor emission are separated in two distinct spectral bands and detected by two different SPAD arrays.