Fig. 2.

Design of the proposed PSA using the ASF. a Schematic diagram of the PSA with a novel ASF that allows angle-resolved forward scattering measurements, in combination with a CMOS image sensor array and a collimated LED source, b An example raw image of sample with a volume median diameter of 44 µm at a concentration of 15 mg ml⁻¹ obtained from the CMOS image sensor array. c Photograph of the fabricated ASF and d laboratory prototype showing the compactness of the proposed PSA