The laser has biological effects.
Light is a very special thing, as even high school students know, it has both wave and particle duality.
Waves give it energy.
Particles give it impact.
Laser with specific wavelengths can react with biological proteins, which is the principle behind using lasers to develop fingerprints.
In Lu Chuan's Intermediate Fingerprint Collection Skills card, there is an analysis of the effects of different wavelength lasers on fingerprint collection.
A laser source with a wavelength of 445±5 nanometers and output power greater than 13 watts can non-destructively develop fingerprints on paper.
Of course, fingerprints on leather and clothes can also be developed using this method.
However, the corresponding laser wavelengths are different.
With the equipment, Lu Chuan quickly completed the fingerprint information collection on the envelope.
But this is not the end.
The economic investigation department needs the fingerprint comparison results.
