Hidden letters detection (IMAGE) Forschungszentrum Juelich Caption The SWIR detector developed at Jülich makes hidden letters in the NIR and SWIR range visible (VIS = visible light/camera). Credit Forschungszentrum Jülich / Politecnico di Milano Usage Restrictions Please give credit! License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.