FIELD: physics, optics.
SUBSTANCE: invention relates to special types of printing allowing to create in the body the sheet material of image from crystals. The method of image forming consists in adding to the sheet material of the composition of solution of materials for formation of crystals containing metals, metalloids or semiconductors, action by laser impulses on specified points of the sheet material with formation in these points of blind channels, creation in channels of low-temperature plasma with formation of gaseous medium with presence of atomic hydrogen, recovery in this medium of material of crystals up to clean material with formation of high concentration of clusters, melting with formation of fluid substrate, with the subsequent obtaining of germs, their growth with formation of crystals, coalesced with the sheet material. Before action of laser impulse on the solution in the body of the sheet material the surface is coated by a layer of material with reflecting surface. A hole there is made with laser above the channel in the body of the sheet material. It is impeded by a layer of the material with reflecting surface releasing a heat. The phase of existence of material melt is prolonged at formation of the fluid substrate during crystallisation. Growth of crystals is decelerated, with growing in channels of the oriented crystals, and creation of the image visible in transmitting and reflected light from the specified set of channels with the crystals, grown in them.
EFFECT: invention provides not only its high protection from falsification, but also provides easy identification of the obtained image.
5 cl, 3 dwg
