چكيده به لاتين
Well-known methods in the field of detection using lasers include Raman spectroscopy, laser-induced fluorescence (LIF), laser-induced breakdown spectroscopy (LIBS) and infrared spectroscopy. Our focus in this dissertation is on the laser-induced fluorescence method. The advantages of this method include acceptable sensitivity, low complexity, low price and it is possible to work outside the laboratory conditions. The LIF method can be used to detect and identify materials up to a maximum range of 30 meters.
In order to test the performance of the LIF spectroscopy system in the stand-off distances, first we performed xperiments on Redamine B. After that, various vegetable oils, including olive, canola, corn and sunflower oils were tested. Finally, we studied industrial oils and petroleum derivatives. By comparing the frequency spectra of Redamine B, oil, fuel oil, industrial oils and edible oils, we show that these materials can be identified from the spectrum at the standoff distances which shows the method can be applied to various industrial applications.
