This paper evaluates whether interactions between photons and matter can be exploited to weigh oral solid dosage (OSD) units at extreme throughput (≥60,000 tablets/hour) with accuracy of ±0.1 mg across a 1 mg–2 g mass range. We analyse three photon routes — gravitational red/blue-shift, radiation pressure/momentum transfer, and photothermal (energy-absorption) calorimetry — and compare them to viable mechanical/electromechanical methods.
Conclusion: photon-based gravimetry is not a practical path to the stated specification. The only credible route is parallelisation of fast electromagnetic-force-restoration (EMFR) weighing cells, optionally combined with dynamic inertial/resonant techniques and model-based signal processing.
Download the full white paper HERE.
