multi-wavelengths light source features 2

The application of optical technology is used widely in the field of criminal science widely, for a lot of material evidence detection, various optical detection method is routine first step, it has the characters of high sensitivity and no damage to the test materials, with the continuous application of laser in the field of material evidence detection, various kinds fluorescence methods gradually recognized by the people. The laser is used as excitation light source, which is characterized by high intensity and high monochromaticity. But the disadvantage is that it has only 1 band or 2-3 bands, including UV, blue laser, green and red, etc. The main advantage of the multi wave band light source is that it has multi-wavelength output, the wave bands setting according to various fingerprint substance absorption spectrum, so you can more effectively stimulate the fluorescence fingerprint. In addition, the multi band light source is low in price and easy to carry, suitable for using at crime scene, compared to the laser, the multi band light source intensity is low, but because of higher wavelength selectivity, and its perfect excitation effect.