Method and device for the determinination of contaminations

摘要: Process for determining contamination comprises radiating a sample with pulsed laser beam from light source (1); detecting fluorescence radiation in first step as the measured value F1 and second F2; prevailing not third separated by distance x, F3; degree of forming ratio values F2 taking into consideration. An Independent claim is also included device comprising (1) producing radiation, an illuminating observation lens (2) applying onto one (3) receiving detector unit (4) sample. Preferred Features: The radiated frequency more than 1 kHz.