Non-invasive Estimation of the Powder Size Distribution from a Single Speckle Image
Qihang Zhang,
George Barbastathis,
Ajinkya Pandit
et al.
Abstract:Non-invasive characterization of powders may take one of two approaches: imaging and counting individual particles; or relying on scattered light to estimate the particle size distribution (PSD) of the ensemble. The former approach runs into practical difficulties, as the system must conform to the working distance and other restrictions of the imaging optics. The latter approach requires an inverse map from the speckle autocorrelation to the particle sizes. The principle relies on the pupil function determini… Show more
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