Police investigations, fingerprint is very important. Researchers Waseda University Institute of Science and police cooperation, the development of a no contact can quickly detect the new device fingerprints, and even if the two added together can identify fingerprints.

Previously fingerprint, often used sprinkle drops of a solution of aluminum or the like so that the fingerprint surface. However, these methods may damage the article attached with fingerprint useful DNA (deoxyribonucleic acid) substances, also difficult to distinguish overlapping fingerprint.

The study, hyperspectral imaging technology, to launch targeted article has little effect on the DNA of a wavelength of 532 nm green laser, color differences by observing the reflected light, it is possible to discern the shape of the fingerprint. Even if there are two overlapping fingerprint, since there is a slight color difference, it is possible with 70% accuracy distinguish.

Since the composition of fats and amino acids in fingerprints will change over time, they will also change the reaction to light, so the technology can understand fingerprint retention time.

The size of such devices as a suitcase, easily transported to the scene. In the future, the research team is prepared to continue improving, strive to make the device to practical use in 2017.