2 articles published in JoVE
Fluorescent Paper Strips for the Detection of Diesel Adulteration with Smartphone Read-out Jérémy Bell1, Raúl Gotor1, Knut Rurack1 1Bundesanstalt für Materialforschung und –prüfung (BAM) Here, we present a protocol to detect the adulteration of diesel with kerosene using test strips coated with a fluorescent viscosity probe together with a smartphone-based analysis system.
Subsurface Defect Localization by Structured Heating Using Laser Projected Photothermal Thermography Erik Thiel1, Mathias Ziegler1 1Department for Non-Destructive Testing, Thermographic Methods, Bundesanstalt für Materialforschung und -prüfung (BAM) This method aims at locating vertical subsurface defects. Here, we couple a laser with a spatial light modulator and trigger its video input to heat a sample surface deterministically with two anti-phased modulated lines while acquiring highly resolved thermal images. The defect position is retrieved from evaluating thermal wave interference minima.