Single-particle light-scattering measurements with a photodiode array

A monolithic 128-element photodiode array is used to detect the light scattered between 7.5 and 21.5° with 0.1° resolution from single particles in a flow stream. The scan of the linear array is synchronized with the light-scattering event by a precursor signal. Monodispersed samples of polystyrene latex microspheres with diameters of 12.5, 15.7, and 19.8 μm were examined.A monolithic 128-element photodiode array is used to detect the light scattered between 7.5 and 21.5° with 0.1° resolution from single particles in a flow stream. The scan of the linear array is synchronized with the light-scattering event by a precursor signal. Monodispersed samples of polystyrene latex microspheres with diameters of 12.5, 15.7, and 19.8 μm were examined.