HSI technology, the quantum leap in NIR sorting: the new generation of UniSort equipment is based on the latest NIR camera technology – Hyper Spectral Imaging (HSI). Its advantages are due to the combination of extremely high spatial and spectral resolution. As a result, small objects can also be reliably recognized. Complex sorting tasks are possible because the system records the complete spectral region for every spatial point, and utilizes mature, fast spectrometric algorithms, making this new generation of equipment extremely versatile.

High-performance, state-of-the-art hardware components enable the analytical processing of the flood of data from the spectroscopic measurements even at the highest possible spatial resolution. Furthermore, the spectral measurements are not simply compared with known patterns. The specially developed algorithms not only classify the standard plastics, but can also be adapted to tackle more difficult tasks.

HSI’s advantages over standard NIR technology:

- All of the spectroscopic data recorded are measured simultaneously and processed in the high speed camera. The HSI technology uses the principle of a high-resolution line camera with a resolution of 320 pixels perpendicular to the belt direction.

- Another advantage of the system is its optimal use of the incident light, as the system measures continuously rather than only recording one scan point at a time. This means that HSI technology requires significantly lower light levels and thus less energy.

- The system’s spatial resolution is approximately 6 x 6 mm and is thus conceived for fraction sizes of 10 mm and above. The HSI sensor is mounted above the conveyor belt in such a way that larger objects such as bulky components or canisters that are smaller than 500 mm and have found their way onto the belt can pass without problems.