Traditional UV absorbance tests often require benchtop spectrophotometers and lab workflows that are slow, expensive, and hard to deploy widely. This is a significant hurdle because ultraviolet measurements are deeply useful in biomedical and chemical analysis, including assays that track analytes and proteins in blood serum and urine. A practical near-UV platform that travels with the user would push testing closer to where decisions are made. The Challenge of Near-UV Sensing Nature already has a “cheat code” for this. Many insects can see ultraviolet patterns on flowers that humans cannot, because UV carries information invisible in the normal visible range. While the near-UV region is information-rich for many molecules, most low-cost imaging tools—like smartphones—ignore it.

Md. Sadik Al Rayhan, presented an in-depth talk on Optical Sensing and Optical Instrumentation at the Faculty Research Insight Session, University of Scholars, Dhaka