| 摘要 |
<p>The micro-optical system of the synthesis of visual images claimed as the invention is primarily a device used to certify the authenticity of products and can be used efficiently to protect bank notes, securities, documents, plastic cards, bank charge cards, documentary, identification, and control stamps, and various consumer goods against counterfeit. The micro-optical system in accordance with the claimed invention consists of a base with a single layer of flat optical elements, which have the form of flat off-axis Fresnel lenses with a paraboloid phase function or flat off-axis Fresnel lenses with a saddle-shaped phase function made in the form of microrelief and effecting, when the microoptical system is illuminated, the synthesis of images consisting of separate points exhibiting the visual effect of the motion of synthesized images when the base is tilted with respect to the observer. The technical result consists in improved reliability of the visual control of the products protected using the claimed system due to the creation of easy-to-control effect of image motion combined with reduced thickness of the claimed system. The invention can be implemented using the already available standard equipment.</p> |
